Samson HA2500 Specifications
Contents
1. Om Hartke GRAPHIC EQUALIZER CONTOUR MASTER POWER 30Hz 64Hz 125Hz 250Hz 500Hz 1KHz 2KHz 3KHz SKHz SKHZ Q IN E COMPRESSION LOW PASS HIGH PASS VOLUME a o esa sa MMM om Hartke 9 mre PRE AMP COMP GRAPHIC EQUALIZER CONTOUR MASTER POWER 125H2 250H2 5 2KMz 3KMz 8KHz A B 7 PASSIVE 1 ACTIVE 12 W COMPRESSION et LOW PASS HIGH PASS VOLUME 14 c7 VR SOLID STATE MASTER SECTION Appendix B Block Diagram COMPRESSOR IN OUT SWITCH AN RMS DETECTOR COMPRESS x VCA 10 BAND EQ 10 BAND OUT o 10 BAND IN Model 2500 15 o SEND 50 mV OUT c 0 dB TO 4dB RETURN ER 2 BAND CONTOUR PRE 5 2 9 O POST ne 3 50 mV OUT 20 dB TO 30 dB GND LIFT NORMAL o d PROTECTION ads 4 Appendix Changing the Model 2500 Voltage Following are step by step instructions for changing the mains voltage of the Model HA2500 WARNING Before carrying out this operation remove the power cord o 1 Insert a small screwdriv er into the slot beneath the 2 Remove fuse sled fuse sled and gently press in and up2. brands of speak ers can be used In line effects such as footpedals intended for low signal levels should be placed between the bass and the amplifier Input and not connected with the Effect Send and Return jacks Note that the settings of the ten band graphic equalizer will affect a Post Direct Out signal regardless of the position of the front panel In Out switch Setting Up and Using the Model 2500 SPEAKER OUTPUTS MINIMUM IMPEDANCE 4 OHMS INPUT Setting up your Hartke Systems 5500 Bass Amplifier is a simple procedure which takes only a few minutes 1 Remove all packing materials save them in case of need for future service and decide where the amplifier is to be physically placed To avoid potential overheating problems be sure that the rear panel is unobstructed and that there is good ventilation around the entire unit particularly behind the rear panel fan 2 Begin by hooking up your bass cabinet or cabinets using the 1 4 unbalanced Speaker output connectors on the rear panel it is never a good idea to power up any amplifier that is not connected to loudspeakers We recommend the use of a single 4 ohm cabinet or two 8 ohm cabinets Hartke amps are optimized for use with Hartke bass cabinets although other brands of speakers can be substituted Any appropriately rated bass cabinet with a minimum impedance of 4 ohms that is 4 ohms or greater can be used In order to ensure correct phase correlati
3. information see the About Equalization section on pages 10 11 of this manual 9 Contour High Pass control This acts as a broad band high frequency equalizer providing 18 dB of boost or attenuation at 10 kHz You should generally adjust this control and the Contour Low Pass control described in 48 above prior to fine tuning the system with the graphic equalizer as described in 47 above For more information see the About Equalization section on pages 13 14 of this manual 10 Master Volume control This is the overall volume control For best sig nal to noise ratio keep the output of your bass at or near maximum and adjust the amp s Master Volume to the desired level 11 Power LED Lights whenever the Model 2500 is powered on 12 Power switch Use this to power the Model 2500 on or off Guided Tour Model 2500 Rear Panel EFFECT Hartke Distributed Exclusively by Samson Technologies Corp www samsontech com MODEL 2500 0 WATTS 802175 WATTS 402250 WATTS CAUTION RETURN SEND SPEAKER OUTPUTS TO PREVENT SHOCK DO NOT OPEN NO U EXPOSE TO RAIN OR MOISTURE 1 Fuse sled This contains a fuse holder and shows the currently selected voltage rating for your Model 2500 Make sure the voltage rating is correctly set before powering up the amplifier Fuse ratings are 10 amp for 115 vac and 6 2 amp for 230 vac For information on how to change the voltage rat
4. out how each graphic equalizer slider affects the sound of your par ticular bass start with all ten bands flat that is all ten sliders at their detent ed 0 center position Then one by one raise and lower each slider lis tening carefully to the effect of each If you don t specifically need to utilize the ten band graphic equalizer bypass it by setting the In Out switch to its Out position Alternatively you can preset a custom graphic equalization curve for example for a feature solo and activate it simply by pressing the switch when needed Note that turning all EQ controls up the same amount will have virtually the same effect as simply turning up the Master Volume conversely turning them all down the same amount will have virtually the same effect as turning down the Master Volume Both approaches are pointless after all that s why we gave you a Master Volume control In many instances the best way to deal with equalization is to think in terms of which frequency areas you need to attenuate as opposed to which ones you need to boost Be aware that boosting a frequency area also has the effect of boosting the overall signal specifically too much low frequency EQ boost can actually cause overload distortion or even harm a connected speaker though the Model 2500 s compression circuitry if on will act to some extent to prevent this from occurring In general if you re going to apply a fair amount of low frequency EQ b
5. un clair dans un triangle pr vient l utilisateur de la pr sence d une tension dangereuse et non isol e dans l appareil Cette tension constitue un risque d lectrocution Le signe avec un point d exclamation dans un triangle pr vient l utilisateur d instructions importantes relatives l utilisation et la maintenance du produit Consignes de s curit importantes 1 Veuillez lire toutes les instructions avant d utiliser l appareil Conserver ces instructions pour toute lecture ult rieure Lisez avec attention toutes les consignes de s curit Suivez les instructions du fabricant Ne pas utiliser cet appareil pr s d une source liquide ou dans un lieu humide Nettoyez l appareil uniquement avec un tissu humide Veillez ne pas obstruer les fentes pr vues pour la ventilation de l appareil Installez l appareil selon les instructions du fabricant 8 Ne pas installer pr s d une source de chaleur radiateurs etc ou de tout qui pement susceptible de g n rer de la chaleur amplificateurs de puissance par exemple 9 Ne pasretirer la terre du cordon secteur ou de la prise murale Les fiches cana diennes avec polarisation avec une lame plus large ne doivent pas tre modi fi es Si votre prise murale ne correspond pas au modele fourni consultez votre lectricien 10 Prot gez le cordon secteur contre tous les dommages possibles pincement tension torsion etc Veillez ce que le cordon secteur soit libre
6. 10 kHz Ten Band Graphic 15 dB center detented 30 Hz 64 Hz 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 3 kHz 5 kHz 8 kHz Compression Ratio 2 1 to infinity Send Output Level 0 dBM Return Input Level 0 dBM Appendix A Sound Set up Templates Below you will find blank 2500 set up templates that you can use to write down your favorite settings Feel free to photocopy these pages if needed amp MODEL HA2500 250 WATTS Z uuu LLL PRE AMP COMP GRAPHIC EQUALIZER CONTOUR MASTER POWER 30Hz 64Hz 125Hz 250Hz 500Hz 1KHz 2KHz 3KHz SKHz 8KHz O PASSIVE orr ACTIVE AN Dh LOW PASS HIGH PASS VOLUME COMPRESSION 9 amp MODEL HA2500 250 WATTS a PRE AMP GRAPHIC EQUALIZER CONTOUR MASTER POWER 30Hz 64Hz 125Hz 250Hz 500Hz 1KHz 2KHz 3KHz 5 8 2 O 2 o By 24 E 2 VON E 4 we COMPRESSION LOW PASS HIGH PASS VOLUME Hartke o COMP GRAPHIC EQUALIZER CONTOUR MASTER POWER 30Hz 64Hz 125Hz 250Hz S00Hz 1KHz 2KHz 3KHz SKHz 8KHz O A B PASSIVE ACTIVE WZ COMPRESSION LOW PASS HIGH PASS VOLUME e
7. As the knob is raised clockwise at settings from 1 to co increasing amounts of compression is applied At the highest settings loud sounds will not just be compressed but limited where the output remains virtually constant regardless of input Compression has three main uses First as just described it evens out the notes played by your bass so that they all appear at virtually equal level Second it adds punch to a sound since all levels are nearly the same you can play with greater force without worrying about the loudest notes distort ing Finally it serves to protect your loudspeakers from damage as a result of brief transient high output levels as might be caused by finger popping or other performance techniques Whether or not you need to use compression with your Model 2500 will be a matter of personal taste and playing style experiment and see if you like the effect If you usually play at low volume levels you ll find that even with the Compression knob turned up the compression circuitry may have no audible effect so it might as well be off In general if you don t need compression leave it off Specifications Input Sensitivity Passive Input 100 k Ohms 20 mv Active Input 100 k Ohms 60 mv Rated Output Power 250 watts 4 ohms 180 watts 8 ohms Total Harmonic Distortion less than 5 Signal To Noise Ratio approx 78 dB Equalizer Contour Low Pass 18 dB 100 Hz Contour High Pass 18 dB
8. E undesirable distortion 8 When you have settled on a Pre Amp balance the next step is to adjust the two Contour bass and treble equalizer controls to taste For more information see the About Equalization section on page 10 of this manual When you get a great setting that complements your instrument and playing style it s a good idea to write it down for future use CONTOUR LOW PASS HIGH PASS 9 Next experiment with the Model 2500 graphic equalizer Begin by setting each of the ten sliders to their flat 0 center detented position Then press in the In Out switch to its In position so that the graphic equalizer is activated Finally move each slider in turn as you play your bass For more information see the About Equalization section on page 10 of this manual Again when you get a graphic equalization setting that complements your instrument and playing style it s a good idea to write it down for future use 1 250Hz mu BKH 10 Now try out the Model 2500 compression circuitry Activate it by turning the Compression knob clockwise from its Off position you ll hear a click when it is activated As you turn the knob clockwise the input signal from your bass becomes more and more severely compressed you ll hear peak signals such as string slaps and pulls begin to soun
9. HAZBOO CONTOUR 250 WATT BASS AMPLIFIERS Owners Manual Hartke Safety Instructions Consignes de s curit Sicherheitsvorkehrungen Instrucciones de seguridad CAUTION WARNING DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE CAUTION AVIS RISQUE DE CHOC ELECTRONIQUE NE PAS OUVRIR WARNING To reduce the risk of fire or electric shock do not expose this unit to rain or moisture To reduce the hazard of electrical shock do not remove cover or back No user serviceable parts inside Please refer all servicing to qualified personnel The lightning flash with an arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the product Important Safety Instructions Please read all instructions before operating the unit Keep these instructions for future reference Please heed all safety warnings Follow manufacturers instructions Do not use this unit near water or moisture Clean only with a damp cloth Do not bloc
10. Q controls of the Model 2500 don t m forget that your bass also provides EQ controls in the form of its tonal set H tings this can be particularly effective in instruments that have active ene circuitry Also try various EO settings with different Pre Amp blends and se ne with and without Compression For more information see the About Compression section on the following page 11 About Compression Model 2500 Compression control The dynamic range of a sound is the difference between its loudest and soft est points For example as you play your bass you ll probably find that some notes for example notes played on the upper frets of the lowest string are considerably louder than others The function of the Compression circuitry in the Model 2500 Bass Amplifier is to reduce overall dynamic range by auto matically reducing the level of the loudest sounds you play so that they are closer in level to softer ones the end result is that the sound evens out and all notes played have pretty much the same level The front panel Compression control determines the amount of compression peak signal reduction by simultaneously adjusting both threshold and com pression ratio which ranges from 2 1 to infinity limiting At the fully coun terclockwise Off position the circuitry is bypassed and no compression is applied the knob clicks when set to the Off position
11. The fuse sled will pop out approximately 3 8 inch 3 Use a small pair of needlenose pliers to gently pull out the mains jumper d 11 TJ a 4 Use the needlenose pliers to reverse 5 Be sure that the proper the mains jumper so that the other voltage selection shows in voltage value is facing outwards then the Fuse Sled window um reinsert the mains jumper Finally before use reinsert the fuse sled by gently pushing it back in until you hear a click Note that the fuse sled carries two fuses one for 115 volt operation actually 105 120 volts and another for 230 volt operation actually 220 240 volts The position of the two fuses in the sled as well as the fuse ratings must be maintained for adequate protection Fuse ratings for the Model 2500 are 5 amp for 115 VAC and 2 5 amp for 230 VAC 16 Hartke 45 Gilpin Avenue Hauppauge New York 11788 8816 Phone 1 800 3 SAMSON 1 800 372 6766 Fax 631 784 2201 www hartke com
12. d increasingly squashed relative to the lower level signals produced by standard playing The result will be a decreased dynamic range but an overall leveling of signal throughout the full pitch range of your instrument For more information see the About Compression section on page 12 11 If you re using an external signal processor turn your Hartke amplifier off momentarily and then connect a standard audio cable between the Effect Send jack and your effects processor input and another standard audio cable between the Effect Return jack and your effects processor output if required multiple effects processors can be daisy chained together output to input Then turn the amp back on and play your bass while adjusting the controls of your outboard effects processor s For best results set both the input and output gain of all connected effects processor s to 0 dB unity gain so that there is no increase or decrease in level whether the effects are switched in or out EFFECT If you have followed all the steps above and are still experiencing difficulties call Model 2500 Effect Send Return jacks Samson Technical Support 516 932 1062 between 9 AM and 5 PM EST About Equalization CONTOUR LOW PASS HIGH PASS Contour controls GRAPHIC EQUALIZER 5 zm Graphic equali
13. djust the relative amount of Send dry versus Return wet effect signal being routed to the speaker outputs Electronically balanced direct output that provides a means of routing sig nal to professional mixing consoles in both live performance and recording environments A ground lift switch helps prevent hum or buzz from enter ing the signal and a pre post switch allows the direct signal to be derived either before or after the amp EQ section Rugged construction makes the Model 2500 eminently road worthy Guided Tour Model 2500 Front Panel 1 3114 51 6 7 8 9 10 11 MODEL HA2500 7250 WATTS SE gt INPUT PRE AMP CONTOUR 250Hz kHz PASSIVE M N ACTIVE N N Y is LOW PASS HIGH PASS VOLUME 1 Passive Input jack If your bass guitar has passive circuitry connect it to the Model 2500 here This standard 1 4 unbalanced jack provides a high impedance 100 k Ohms input sensitivity of 20 millivolts 2 Active Input jack If your bass guitar has active circuitry connect it to the Model 2500 here This standard 1 4 unbalanced jack provides a high imped ance 100 k Ohms input sensitivity of 60 millivolts 3 Pre Amp A Tube Emulation control This determines the amount of pre amplification being provided by special circuitr
14. e o el enchufe est n da ados o si se han derramado l quidos o se ha introducido alg n objeto dentro de la unidad si esta ha quedado expuesta a la lluvia o la humedad si no funciona normalmente o si ha ca do al suelo Table of Contents Introduction en ere ere Sine 2 pru a rr e ENEE 3 Guided sis rem Front Panel ce 4 5 Rear P nel eer in aia ae 6 7 Setting Up and Using the Model 2500 8 9 About Equalization u 10 11 About Compression n Re ee ELE AER E 12 Specifications eer NEES en 13 Appendix A Sound Set up Templates 14 Appendix A Block Diagram eu 15 Appendix B Changing the Model 2500 Voltage 16 Copyright 2005 2006 Samson Technologies Corp Printed June 2006 v1 2 Samson Technologies Corp 45 Gilpin Avenue Hauppauge New York 11788 8816 Phone 1 800 3 SAMSON 1 800 372 6766 Fax 631 784 2201 www hartke com Introduction Congratulations on purchasing the Hartke Model 2500 Bass Amplifier Although this unit is designed for easy operation we suggest you first take some time to go through these pages so you can fully understand how we ve implemented a number of unique features The Model 2500 provides 250 watts of power to a 4 ohm speaker system or 180 wa
15. eine Teile die vom Anwender gewartet werden k n nen berlassen Sie die Wartung qualifiziertem Fachpersonal Der Blitz mit Pfeilspitze im gleichseitigen Dreieck soll den Anwender vor nichtisolierter gef hrlicher Spannung im Ger teinnern warnen Diese Spannung kann so hoch sein dass die Gefahr eines Stromschlags besteht Das Ausrufezeichen im gleichseitigen Dreieck soll den Anwender auf wichtige Bedienungs und Wartungsanleitungen aufmerksam machen die im mit gelieferten Informationsmaterial n her beschrieben werden Wichtige Sicherheitsvorkehrungen 1 Lesen Sie alle Anleitungen bevor Sie das Ger t in Betrieb nehmen 2 Bewahren Sie diese Anleitungen f r den sp teren Gebrauch gut auf Bitte treffen Sie alle beschriebenen Sicherheitsvorkehrungen Befolgen Sie die Anleitungen des Herstellers Benutzen Sie das Ger t nicht in der N he von Wasser oder Feuchtigkeit Verwenden Sie zur Reinigung des Ger ts nur ein feuchtes Tuch Blockieren Sie keine Bel ftungs ffnungen Nehmen Sie den Einbau des Ger ts nur entsprechend den Anweisungen des Herstellers vor 8 Bauen Sie das Ger t nicht in der N he von W rmequellen wie Heizk rpern Warmeklappen Ofen oder anderen Ger ten inklusive Verst rkern ein die Hitze erzeugen 9 Setzen Sie die Sicherheitsfunktion des polarisierten oder geerdeten Steckers nicht auBer Kraft Ein polarisierter Stecker hat zwei flache unterschiedlich breite Pole Ein geerdeter Stecker hat zwei flache Po
16. en particulier sa sortie du boitier 11 D connectez l appareil du secteur en pr sence d orage ou lors de p riodes d inutilisation prolong es 12 Consultez un service de r paration qualifi pour tout dysfonctionnement dom mage sur le cordon secteur baisse de performances exposition la pluie pro jection liquide dans l appareil introduction d un objet dans le boitier etc Ii SEH A PRECAUCION Para reducir el riesgo de incendios o descargas no permita que este aparato quede expuesto a la lluvia o la humedad Para reducir el riesgo de descarga el ctrica nunca quite la tapa ni el chasis Dentro del aparato no hay piezas susceptibles de ser reparadas por el usuario Dirija cualquier reparaci n al servicio t cnico oficial El s mbolo del rel mpago dentro del tri ngulo equil tero pretende advertir al usuario de la presencia de voltajes peligrosos no aislados dentro de la carcasa del producto que pueden ser de la magnitud suficiente como para constituir un riesgo de descarga el c trica a las personas El s mbolo de exclamaci n dentro del tri ngulo equil tero quiere advertirle de la existencia de importantes instrucciones de manejo y mantenimiento reparaciones en los documentos que se adjuntan con este aparato Instrucciones importantes de seguridad 1 Leatodo este manual de instrucciones antes de comenzar a usar la unidad 2 Conserve estas instrucciones para cualquier consulta en el futuro Cumpla con todo l
17. ing see Appendix B on page 14 2 AC input Connect the supplied standard 3 pin IEC plug here 3 Fan The fan provides vital cooling to your Model 2500 Make sure that it is kept free of all obstructions and that cool fresh air is accessible at all times Also try to ensure that the Model 2500 is used in a dust free environment 4 Effect Return jack Use this 1 4 unbalanced jack to return low impedance 600 ohm signal to the Model 2500 from a professional outboard effects processor Guided Tour 2500 Rear Panel 5 Effect Send jack Use this 1 4 unbalanced jack to send low impedance 100 ohm signal from the Model 2500 to a professional outboard effects processor such as a reverb echo chorus flanger or harmonizer device Output level is approximately 0 dB to 4 dB and is post EQ and post compression but unaffected by the setting of the Master Volume control You can also use the Effect Send jack to route signal to an external mixing console or amplifier with an input sensitivity of 4 dB 6 Speaker outputs Connect any 4 8 or 16 ohm bass cabinet s to these standard unbalanced 1 4 jacks WARNING Because of the high power levels and low frequency content of the signal generated by the Model 2500 use only appropriately rated speaker cabinets at least 250 watts at 4 ohms that are specifically designed for bass instruments We recommend that Hartke amplifiers be used with Hartke bass cabinets although other
18. k any of the ventilation openings Install in accordance with the manu facturers instructions 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 Do not defeat the safety purpose of the polarized or grounding type plug A polar ized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or third prong is pro vided for your safety When the provided plug does not fit your outlet consult an electrician for replacement of the obsolete outlet 10 Protect the power cord from being walked on and pinched particularly at plugs convenience receptacles and at the point at which they exit from the unit 11 Unplug this unit during lightning storms or when unused for long periods of time 12 Refer all servicing to qualified personnel Servicing is required when the unit has been damaged in any way such as power supply cord or plug damage or if liquid has been spilled or objects have fallen into the unit the unit has been exposed to rain or moisture does not operate normally or has been dropped NQUBWN gt ACHTUNG Um die Gefahr eines Brandes oder Stromschlags zu verringern sollten Sie dieses Ger t weder Regen noch Feuchtigkeit aussetzen Um die Gefahr eines Stromschlags zu verringern sollten Sie weder Deckel noch R ckwand des Gerats ent fernen Im Innern befinden sich k
19. le und einen dritten Erdungsstift Der breitere Pol oder der dritte Stift dient Ihrer Sicherheit Wenn der vorhandene Stecker nicht in Ihre Steckdose passt lassen Sie die veraltete Steckdose von einem Elektriker ersetzen 10 Sch tzen Sie das Netzkabel dahingehend dass niemand dar ber laufen und es nicht geknickt werden kann Achten Sie hierbei besonders auf Netzstecker Mehrfachsteckdosen und den Kabelanschluss am Ger t 11 Ziehen Sie den Netzstecker des Ger ts bei Gewittern oder l ngeren Betriebspausen aus der Steckdose 12 berlassen Sie die Wartung qualifiziertem Fachpersonal Eine Wartung ist not wendig wenn das Ger t auf irgendeine Weise beispielsweise am Kabel oder Netzstecker beschadigt wurde oder wenn Fl ssigkeiten oder Objekte in das Ger t gelangt sind es Regen oder Feuchtigkeit ausgesetzt war nicht mehr wie gewohnt betrieben werden kann oder fallen gelassen wurde So Urge p FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE ONLY WITH SAME TYPE FUSE ATTENTION UTILISER UN FUSIBLE DE RECHANGE DE M ME TYPE RISK OF ELECTRIC SHOCK DO NOT OPEN ATTENTION Pour viter tout risque d lectrocution ou d incendie ne pas exposer cet appareil la pluie ou l humidit Pour viter tout risque d lectrocution ne pas ter le couvercle ou le dos du boitier Cet appareil ne contient aucune pi ce rem placable par l utilisateur Confiez toutes les r parations un personnel qualifi Le signe avec
20. o indicado en las precauciones de seguridad Observe y siga todas las instrucciones del fabricante Nunca utilice este aparato cerca del agua o en lugares h medos Limpie este aparato solo con un trapo suave y ligeramente humedecido No bloquee ninguna de las aberturas de ventilaci n Instale este aparato de acu erdo a las instrucciones del fabricante 8 No instale este aparato cerca de fuentes de calor como radiadores calentadores hornos u otros aparatos incluyendo amplificadores que produzcan calor naupw 9 Noanule el sistema de seguridad del enchufe de tipo polarizado con toma de tierra Un enchufe polarizado tiene dos bornes uno mas ancho que el otro Uno con toma de tierra tiene dos bornes normales y un tercero para la conexi n a tierra El borne ancho o el tercero se incluyen como medida de seguridad Cuando el enchufe no encaje en su salida de corriente llame a un electricista para que le cambie su salida anticuada 10 Evite que el cable de corriente quede en una posici n en la que pueda ser pisado o aplastado especialmente en los enchufes recept culos y en el punto en el que salen de la unidad 11 Desconecte de la corriente este aparato durante las tormentas el ctricas o cuando no lo vaya a usar durante un periodo de tiempo largo 12 Dirija cualquier posible reparaci n solo al servicio t cnico oficial Deber hacer que su aparato sea reparado cuando est dafiado de alguna forma como si el cable de corrient
21. on the tip of the Model 2500 speaker jack should be connected to the hot input of your loudspeaker and the sleeve of the Model 2500 speaker jack should be connected to the ground input of your loudspeaker WARNING Hartke amplifiers can deliver very high power levels Driven to full power they can damage connected loudspeakers regardless of brand size or configuration Care should be taken not to strain connected loud speakers as this can cause permanent damage and will degrade the per formance of the entire system If you see connected loudspeakers moving excessively turn your system down immediately or use the equalization and or compression controls to reduce the amount of subharmonic extremely low frequency signal 3 Next connect the 3 pin AC plug into any grounded AC socket Don t turn the amplifier on just yet though 4 Use a standard music instrument cable to connect your bass to the appropri ate Input jack on the front panel if your bass has active circuitry connect it to the Active input if not connect it to the Passive input On the front panel of the Model 2500 set the Master volume control to 0 fully counterclockwise and set both Pre Amp A Tube Emulation and B Solid State knobs to 5 the twelve o clock position Set the Compression knob to its Off position fully counterclockwise you ll hear a click and set both Contour knobs to their center detented 0 position Finally
22. oost it s a good idea to keep Compression on if only to protect your speakers from potential damage The specific EO you will apply to your bass signal is very much dependent upon your particular instrument and personal taste and playing style However here are a few general suggestions For that super deep reggae or Motown sound boost low frequen GRAPHIC EQUALIZER cies slightly while attenuating the highest ones leave mid range frequencies flat or slightly attenuated as shown in the illustration gt on the right o 5 3 4 OH To remove boxiness and make your instrument sound more hi fi 9979999985 hr try attenuating mid range frequencies while leaving low and high frequency settings flat as shown in the illustration on the right GRAPHIC EQUALIZER For a twangy cutting sound try boosting the high and high mid range frequencies as shown in the illustration on the right putting new roundwound strings on your bass will help a lot also our O Whenever you get a really good EQ setting for a particular instru ment or song write it down you d be amazed how easy it is to for get these things GRAPHIC EQUALIZER Finally as you experiment with the E
23. ressed in the In position the Model 2500 s graphic equalizer circuitry as described in 47 below is opera tional When pressed out the Out position it is bypassed The provision of this switch allows you to set up a custom equalization curve an equalization preset with the graphic EQ sliders which can then be activated with the press of a single button 7 Graphic Equalizer These sliders allow you to draw the tonal response of the system by adding 15 dB of boost or attenuation to ten different narrow band frequency areas 30 Hz 64 Hz 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 3 kHz 5 kHz and 8 kHz affecting the main output signal of the Model 2500 When a slider is at its center detented 0 position the selected frequency areais unaffected it is said to be flat When a slider is moved up above the 0 position towards the 15 position the selected frequency area is boosted and when it is moved down below the 0 position towards the 15 position the selected frequency area is attenuated For more informa tion see the About Equalization section on pages 10 11 of this manual 8 Contour Low Pass control This acts as a broad band low frequency equal izer providing 18 dB of boost or attenuation at 100 Hz You should generally adjust this control and the Contour High Pass control described in 9 below prior to fine tuning the system with the graphic equalizer as described in 7 above For more
24. s guitar energy at 10 kHz the High Pass Contour control should be thought of as your overall noise con trol turning it down to the left of the 0 position will help to eradicate hiss and buzz while having very little effect on the bass guitar signal Similarly the Low Pass Contour control when set left of 0 can be used to eliminate rumble and woofiness The ten band graphic equalizer provides ten sliders each corresponding to a single narrow frequency band at 30 Hz 64 Hz 125 Hz 250 Hz 500 Hz 1 kHz 2 kHz 3 kHz 5 kHz and 8 kHz This allows you to draw the desired tonal response of your system When a slider is in its center detented position 0 it is having no effect When it is moved above center towards 4 15 the particular frequency area is being boosted when it is moved below center towards 15 the frequency area is being attenuated We carefully selected these frequency areas because they have maximum impact on bass signals For example the lowest slider 30 Hz affects the very lowest audible frequen cies in fact most humans cannot hear below 20 Hz while the highest four sliders 2 3 5 and 8 kHz affect the twang of a bass string WARNING Use caution when raising the 30 Hz slider above 0 if you are operating at high volume levels especially if Compression is not being used since this can place undue stress on connected loudspeakers About Equalization To find
25. set the graphic equalizer In Out switch to its Out position 5 Press the front panel Power switch in order to turn on the amplifier After approximately three seconds you ll hear a click indicating that the relay protec tion circuitry has completed cycling and that power to the system has been pro vided 6 Set the output of your bass to maximum and then while playing slowly turn the Master volume control up until the desired level is achieved If you hear dis tortion even at low amplifier Master volume settings back off the output of your bass or check for a faulty cable Bass guitars that have active circuitry normally require a battery for the circuitry to be functional Setting Up and Using The Model 2500 7 Experiment with altering the balance of the two Pre Amp knobs listening to the effect each has on the overall sound Depending upon the specific instru ment you are using and your personal taste you may prefer the sound of one over the other or you may prefer a particular blend of the two Note that when both are used at equal settings the amplifier will be twice as loud as when only one is used In step 4 on the previous page we recommended that you begin with both knobs at their midway 5 setting but the two Pre Amp knobs can in fact be set to any blend you like However you will usually want to avoid setting both to their maximum 10 position since this setting will almost always result in TURE U
26. shipping your unit Please retain the original packing material and if possible return the unit in its original carton and packing materials Features The Hartke Model 2500 bass amplifier offers all the newest concepts in bass amplification Here are some of its main features Power to spare The Model 2500 a full 250 watts delivered to a 4 ohm speaker system or 180 watts to an 8 ohm speaker system Our unique Transient Attack circuitry which ensures that every nuance of your bass performance is reproduced faithfully Two Pre Amp input knobs allowing custom blending of solid state and tube type sounds Ten bands of high quality graphic equalization allowing you to create a broad range of tonal colors for your bass instrument A dedicated in out button allows you to preset an equalization curve Two fully adjustable contour knobs high pass and low pass which provide further control over shaping your bass sound A built in compressor which not only adds real punch to your bass sound but also allows you to smooth out volume differences between notes Two independent inputs that accommodate both passive and active bass guitars Protection relay circuitry that protects connected speakers from dangerous overloading and also prevents thumps when powering on or off Effect loop send and return jacks that allow you to connect to professional outboard effects processors An effect Balance knob which enables you to a
27. tts to an 8 ohm speaker system With that kind of power the Model 2500 is EXTREMELY loud and punchy In addition the Model 2500 offers a number of additional advanced features including front panel compression and graphic equalizers effects send and return jacks an effects send return balance knob and a direct output with ground lift and pre or post EQ selec tion The Model 2500 is optimized for use with electric bass instruments You ll find it to be an excellent bass amplifier for live performance use in small and medium size venues in addition the Model 2500 s advanced pre amp fea tures makes it ideal for use in recording environments In these pages you ll find a detailed description of the many features of the Model 2500 bass amplifier as well as a guided tour through it s front and rear panels step by step instructions for setting up and using your amplifier detailed discussions about equalization and compression and full specifica tions You ll also find a warranty card enclosed please don t forget to fill it out and mail it so that you can receive online technical support and so we can send you updated information about these and other Hartke and Samson products in the future SPECIAL NOTE Should your unit ever require servicing a Return Authorization number RA is necessary Without this number the unit will not be accepted Please call Samson Technologies at 516 932 1062 for a Return Authorization number prior to
28. y which delivers the sound of a classic tube amplifier Note that when both Pre Amp knobs are used at equal settings the amplifier will be twice as loud as when only one is used Avoid setting both Pre Amp knobs on maximum 10 since the result will almost always be undesirable distortion 4 Pre Amp B Solid State control This determines the amount of pream plification being provided by special circuitry which delivers the sound of a solid state amplifier Note that when both Pre Amp knobs are used at equal settings the amplifier will be twice as loud as when only one is used Avoid setting both Pre Amp knobs on maximum 10 since the result will almost always be undesirable distortion Bass guitars that have active circuitry normally require a battery for the cir cuitry to be functional Guided Tour Model 2500 Front Panel 5 Compression control This determines the amount of compression peak signal reduction by simultaneously adjusting both threshold and compres sion ratio which ranges from 2 1 to infinity limiting At the fully coun terclockwise Off position the circuitry is bypassed and no compression is applied the knob clicks when set to the Off position As the knob is raised clockwise at settings from 1 to co increasing amounts of compression are applied For more information see the About Compression section on page 12 of this manual 6 Graphic Equalizer In Out switch When p
29. zer The Hartke Systems Model 2500 Bass Amplifier gives you enormous control over shaping the sound of your bass using a process called equalization To understand how this works it s important to know that every naturally occur ring sound consists of a broad range of pitches or frequencies combined together in a unique way This blend is what gives every sound its distinctive tonal color EQ controls allow you to alter a sound by boosting or attenuating specific frequency areas they operate much like the bass and treble controls on your hi fi amp but with much greater precision The Model 2500 provides you with two different means for equalizing your bass sound Low Pass and High Pass Contour controls provide 18 dB of cut or boost in two broad frequency bands A Graphic Equalizer provides 15 dB of cut or boost in ten narrow fre quency bands Normally you will adjust the two Contour controls before fine tuning your EQ with the Graphic Equalizer The Low Pass Contour control affects a broad band of frequencies with 100 Hz as the center point similarly the High Pass Contour control affects a broad band of frequencies with 10 kHz as the cen ter point When either is in its center detented position 0 it is having no effect When it is moved right of center the particular frequency area is being boosted when it is moved left of center the frequency area is being cut attenuated Because there is very little bas
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