USER MANUAL - Ashdown Amplification
Contents
1. pressing this button mutes all sound from the amplifier and allows a tuner connected to the TUNER socket to operate for silent tuning Release the button and you are back in action again TUNER OUT This output socket provides a line level signal that can be used for a permanent connection to a tuner The signal from this socket remains when all other outputs from the amplifier are Muted allowing all sound from the amplifier to be silenced while tuning is in progress LINE OUT This output socket provides a line level post Output Level control signal for connection to an external power amplifier driving additional speaker cabinets OUTPUT LEVEL The OUTPUT control adjusts the overall level of the amplifier Adjust this for your preferred overall stage playing volume can be produced by this type of amplifier Do not operate for prolonged periods of time at high volume without suitable ear protection or at a level that causes you discomfort in any way REAR PANEL FACILITIES LINE INPUT The rear panel has a Line Input socket for connection of other signal sources into the system This can be used for plugging a CD Tape or player into the amplifier for practising rehearsing or for connection of a second pre amp into the system EFFECTS SEND RETURN A serial effects loop is provided at a level of 8 The EFFECTS SEND socket can also be used as a Line Out socket if required as the signal path through the preamp is only broke2. or Slow Blow or Time delay type fuses and have the prefix T or H in the part number So for example a 5 Amp fuse would be T 5A H The exact rating for each particular fuse can be found next to the holder in which that fuse fits If you are not sure what to buy when purchasing replacements take the amplifier with you and show the rear panel to the retailer 7 Warnings used on this equipment The exclamation mark contained within a triangle is intended to alert the user to important operating and servicing instructions contained in the literature accompanying this product The lightning flash within a triangle is intended to alert the user to the presence of un insulated dangerous voltage within the product enclosure that may be of sufficient magnitude to constitute a risk of electric shock This highlights the CAUTION presence of dangerous voltages within the equipment enclosure Never try to operate the unit out of the enclosure ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR 8 Grounding Instructions This product must be grounded earthed If it should malfunction or break down the grounding provides the path of east resistance for the electric current to reduce the risk of electric shock This product is equipped with a power cord which contains a grounding conductor and a grounding plug The plug must be plugged into a compatible mains outlet that is properly installed and grounded in accordance with the
3. DUAL 40 CABINETS SINGLE CABINET DUAL 80 CABINETS 4 SINGLE 80 CABINET Ashdown BTA 427 Small Block and Little Bastard bass amps feature valve output stages It is therefore important to connect the speaker cabinet s correctly before switching the amplifier on Switching the amplifier on without the speaker cabinet s connected can cause damage to the amplifier Damage caused by the failure to correctly connect speaker cabinets is not covered under warranty lt gt 3 2 gt or y 24 gt gt 4 gt 2 i gt jo SS Se we gt gt 5 gt 4 a lt gt Te lt 6 kez 2 f 7 gt pepe 2 gt lt lt 5 0 2S So AF 4 to aS gt ee e FE x aes lt we os 2 4 0 2 a c Maal SS gt gt ot ent 2 z WWW ASHDOWNMUSIC COM
4. Note The CE mark attached to these products means it conforms to EMC 89 69 EEC 93 68 EEC and LDV 72 23 EEC USER MANUAL A 421 SMALL BLOCK HEAD MIDDLE BASS TREBLE GAIN MASTER 2 5 2 INPUTS EFFECTS HIGH SEND RETURN MID SHIFT BASS SHIFT BRIGHT MUTE PRE POST OUTPUT 0 INTERNAL FUSE FAILURE NEONS BTA ONLY gt ec ne een Hr WARNING REDUCE THE RISK OF FIRE OR ELECTRIC AVIS DANS LE BUT DE REDUIRE LES RISQUES D INCENDIE MAINS FUSE ALL TUBE gt DIOUT men AN PREHEAT OUVRIRI ROHS DAMAGE X SPEAKER IS CONNECTED INPUT POWER 600VA STANDBY FRONT PANEL FACILITIES MUTE In the up position this switch mutes the out put of the amplifier INPUTS There are two instrument inputs marked LOW and HIGH The LOW input is high sensitivity and also high impedance to suit the output from PASSIVE Low Output basses The HIGH input is low sensitivity and lower impedance to suit the output from ACTIVE High Output basses Plugging an active High Output bass into the LOW input will overload the input creating a fatter warmer and more distorted sound Experiment by
5. TREBLE 0 VOLUME gt FRONT PANEL 130VA 1 13A 115V Ot POWER AVOID DAMAGE TO THIS UNIT DO NOT OPER IL SPEAKERS ARE CONNECTED SPEAKER OUTPUTS MAINS FUSE 230V T1 6A RC OOOO no HANDMADE BY ASHDOWN REAR PANEL INPUTS There are two instrument inputs marked LOW and HIGH The LOW input is high sensitivity and also high impedance to suit the output from PASSIVE Low Output basses The HIGH input is low sensitivity and lower impedance to suit the output from ACTIVE High Output basses Plugging an active High Output bass into the LOW input will overload the input creating a fatter warmer and more distorted sound Experiment by plugging your bass into either input to achieve the desired sound EFFECTS SEND AND RETURN These 1 4 jack sockets should be used to connect to an external effects device or pedal board The EFFECTS SEND output should connect to the INPUT of the effects unit and the output of the effects unit should be connected to the EFFECTS RETURN input EQ CONTROLS Use the MIDDLE BASS and TREBLE controls to effect the overall tone of the sound The MID SHIFT switch causes the MIDDLE control to operate on higher frequencies in the up position and lower frequencies in the down position The BASS SHIFT switch causes the BASS control to operate on deeper frequencie
6. a Sad 5 550 SPYDER 550 TOURING 200 300 400 LITTLE BASTARD 427 SMALL BLOCK USER MANUAL 427 SMALL BLOCK 550 SPYDER 550 TOURING 200 300 400 1 WELCOME ASHDOWN VALVE BASS AMPS Thank you for choosing an Ashdown Valve Series amplifier To ensure that you receive the full benefits of the Ashdown warranty please register your amplifier at www ashdownmusic com WARRANTY Your amplifier is covered by a one year warranty against defects in materials and workmanship for the original purchaser Ashdown will at their discretion replace or repair any product or part thereof which is found by Ashdown to be defective This warranty shall not apply to the damage of covering fittings or finishes when affected by carelessness accident or extreme climate changes Nor does it apply to normal wear and tear of parts such as valves fuses light bulbs speakers controls etc In the unlikely event of any defect please contact an authorised Ashdown dealer All transport charges are to be pre paid by the Owner Unless your purchase is registered on line normal country warranty laws apply IMPORTANT SAFETY INSTRUCTIONS This Ashdown amplifier has been designed to provide you with many years of faithful service on the road in a studio or in a domestic environment By following the rules set out below you will ensure that the unit functions safely Valve tube instrument amplifi
7. local electrical safety codes applicable to your country DANGER Improper connection of the grounding conductor can result in the possibility of an electric shock If you are in any doubt about the ground connection check with a qualified electrician before using this product NEVER modify the mains power cord Have a suitable mains outlet fitted The wires contained within the supplied power cord are colour coded as follows GREEN amp YELLOW GROUND OR EARTH CONDUCTOR BROWN LIVE CONDUCTOR BLUE NEUTRAL CONDUCTOR 9 Other markings Other markings appear on the rear panel of the amplifiers as follows back of the amplifier has some other markings on it as follows Directs you to recycle this product by taking it to a disposal area for electronic waste when you have finished with it and not dispose of it in the normal household waste Indicates that the product contains only the permitted levels of substances known to be hazardous to your health RoHS 2001 95 EC 9 Indicates that the product has been constructed to European Harmonised Standards and is intended to show that the product is safe to use At present the manufacturer can self certify Relates to an independent safety testing laboratory and shows that the product has been subjected to and passed a series of safety and quality tests and indicates that the product meets all the criteria for sale in Canada and the USA
8. plugging your bass into either input to achieve the desired sound EFFECTS SEND AND RETURN These 1 4 jack sockets should be used to connect to an external effects device or pedal board The EFFECTS SEND output should connect to the INPUT of the effects unit and the output of the effects unit should be connected to the EFFECTS RETURN input EQ CONTROLS Use the MIDDLE BASS and TREBLE controls to effect the overall tone of the sound The MID SHIFT switch causes the MIDDLE control to operate on higher frequencies in the up position and lower frequencies in the down position The BASS SHIFT switch causes the BASS control to operate on deeper frequencies in the up position and less deep frequencies in the down position The BRIGHT switch adds an overall brightness to the sound when in the up position Note The BRIGHT switch is not effective when the GAIN control is set to full GAIN This controls the level of the signal sent to the MASTER section To achieve a cleaner sound turn the GAIN control down and the MASTER up To achieve a richer more distorted sound turn the GAIN control up and the MASTER down MASTER This controls the overall output of the amplifier useful for tuning etc PRE POST This switch determines whether the signal from the DI OUTPUT see Rear Panel Facilities is taken before PRE the EQ section down position or after POST up position VU METER The VU meter provides a visual indication of
9. ASTER up To achieve a richer more distorted sound turn the GAIN control up and the MASTER down MASTER This controls the overall output of the amplifier MANUFACTURED IN ENGLAND BY gt CE ZA SPEAKER OUTPUTS N MIN LOAD 4 OHMS REAR PANEL TOURING COMBO MUTE In the up position this switch mutes the out put of the amplifier useful for tuning etc PRE POST This switch determines whether the signal from the DI OUTPUT see Rear Panel Facilities is taken before PRE the EQ section down position or after POST up position VU METER The VU meter provides a visual indication of the output level of the amplifier REAR PANEL FACILITIES DI OUTPUT This 1 4 stereo jack socket is used to connect the amplifier to a low impedance balanced input on a PA system or recording mixer The signal can be taken PRE or POST EQ see above ie with or without the tone shaping added by the EQ section of the amplifier The 550 Touring replicates this facility on an XLR socket SPEAKER OUTPUTS The 550 Spyder features a single Speakon connector to connect to a cabinet configuration with a minimum impedance load of 4Q The 550 Touring combo has two Speakon connectors one of which connects to the internal speaker the other of which can be used to connect an extention cabinet POWER This switch is used to switch the amplifier on and off 4 LITTLE BAS ayy 774
10. CILITIES INPUTS There are two instrument inputs marked LOW and HIGH The LOW input is high sensitivity and also high impedance to suit the output from PASSIVE Low Output basses The HIGH input is low sensitivity and lower impedance to suit the output from ACTIVE High Output basses Plugging an active High Output bass into the LOW input will overload the input creating a fatter warmer and more distorted sound Experiment by plugging your bass into either input to achieve the desired sound EFFECTS SEND AND RETURN These 1 4 jack sockets should be used to connect to an external effects device or pedal board The EFFECTS SEND output should connect to the INPUT of the effects unit and the output of the effects unit should be connected to the EFFECTS RETURN input EQ CONTROLS Use the MIDDLE BASS and TREBLE controls to effect the overall tone of the sound The MID SHIFT switch causes the MIDDLE control to operate on higher frequencies in the up position and lower frequencies in the down position The BASS SHIFT switch causes the BASS control to operate on deeper frequencies in the up position and less deep frequencies in the down position The BRIGHT switch adds an overall brightness to the sound when in the up position Note The BRIGHT switch is not effective when the GAIN control is set to full GAIN This controls the level of the signal sent to the MASTER section To achieve a cleaner sound turn the GAIN control down and the M
11. O O 0 Baso TREBLE 0 O 9 PTA 200 Vatre Pars 5 e FLATSHARE INSTRUMENT 6 6 60 PASSIVEIACTIVE out eu rout pusu To MUTE Tuner tune out 63 0 INPUT LEVEL VALVE DRIVE EQ COMPRESSION suB SUB HARMONICS OUTPUT MUTE 63 SERIALNo INTERNAL FUSE FAILURE FOOT LINE IN BTAONLY gt SWITCH SEND RETURN RECTIFIER MAIN HT MAINS FUSE 230 T4AH 115V FULL ALLTUBE ONLY gt DI OUT LINE IN 3 WARNING MODEL AVOID DAMAGE POWER THIS UNIT ee 9 JOGO OFF STANDBY INPUT POWER 600VA FRONT PANEL FACILITIES INPUTS There is a single instrument input provided linked to a PASSIVE ACTIVE selector switch The Passive input switch out is high sensitivity and also high impedance to suit the output from PASSIVE basses The Active input switch in is low sensitivity and lower impedance to suit the output from ACTIVE basses INPUT CONTROL The INPUT control sets the signal level through the preamp in conjunction with the INPUT LEVEL VU Meter This is adjusted to give a reading of OVU on the meter for average playing dynamics with occasional peaks into the red region Please note t
12. be produced by this type of amplifier Do not operate for prolonged periods of time at high volume without suitable ear protection or at a level that causes you discomfort in any way If you experience any hearing loss or ringing in the ears you should consult a doctor or audiologist 6 Fuses and ratings Your amplifier is fitted with several fuses to protect yourself and the expensive electronics inside from damage in the event of a malfunction within the amplifier The size and rating of the fuses bas been calculated to offer the most protection from damage possible Various circumstances can lead to fuse failure It is recommended that you familiarise yourself with the type and rating of the individual fuses fitted to your amplifier and carry spare fuses clearly marked with you as replacements Occasionally a fuse will fail as a result of a power surge in the supply or as a result of incorrect connection of the loudspeaker It is permissible to replace the damaged fuse with one of the same type and rating as stated on the rear panel of the amplifier having first unplugged the amplifier from the mains supply and allowed it to cool down If the fuse keeps blowing this indicates that there is a more serious fault within the amplifier such as a damaged tube In this event you must take the amplifier to a qualified technician for repair Never fit a fuse larger than the recommended rating The fuses fitted to you amplifier are Anti Surge
13. ers contain very high voltages and fragile glass tubes and should therefore be handled with care A number of important precautions which must be observed are set out below Before using the amplifier run through the check list below If you are in any doubt about any aspect of the amplifier s operation stop using it immediately and do not resume operation until the amplifier has been thoroughly inspected by a qualified technician 1 Storage and moving When your amplifier is not in use make sure that the power cord is unplugged from the mains outlet and that all leads are removed from the amplifier including jack leads and footswitch leads Jack socket connectors are self cleaning so the process of plugging in and unplugging the leads when not in use will ensure that the internal contacts will be cleaned when you plug in again Store your amplifier in a warm dry place away from moisture and condensation A motor vehicle or cellar may look dry but condensation can form inside the unit causing short circuits and possible electric shock If you suspect the amplifier may have become exposed to moisture move it to a warm dry place and leave it to dry out for at least 48 hours before attempting to use it Condensation can also occur when you move the amplifier from a hot humid place such as a nightclub to a cold place like a motor vehicle In such instances always move the amplifier into a warm dry room to prevent damage When movin
14. g the amplifier handle it as carefully as you would your instruments Although solidly built an amplifier is easily damaged by shock so be careful not to drop it or allow it to fall over Use a protective cover to protect the finish and if you are transporting it with other equipment make sure that the amplifier is on a solid floor at the bottom of the pile Amplifiers are heavy Take care when lifting always use the handles fitted to the amplifier to move it and get help if you have to lift the amplifier to a greater height than you feel comfortable with Never attempt to operate the amplifier after it has been dropped Take it to a qualified technician and have it checked before using it again 2 Leads and plugs Your amplifier contains possibly lethal voltages and must therefore be connected to the mains using the correct power cord which is a three terminal type with a ground connection The power cord supplied with the unit should be of the correct type If it does not fit your mains outlet consult your dealer or a qualified electrician for advice before attempting to use the amplifier Never modify the power cord or attempt to use it with a two pin outlet Store all your leads in a dry case and take care when packing them away All leads including guitar leads are easily damaged with careless handling so it is a good idea to carry a spare lead of every type you use Flexible power cords get damaged very easily At the first s
15. gree of Sub Harmonics is also dependant on the setting of the BASS control DIRECT INJECT 0 1 A balanced D I is provided on a latching XLR socket This has a push button placed below it that allows the user to choose either a Pre E Q signal button pushed IN or a Post E Q Post Sub and effects ignal button OUT 2 he output signal from this XLR socket is set to a level and impedance uitable for connecting directly into the Microphone input of a mixing desk for ither Direct Injection into the PA system or for recording This must ONLY be sed into a Balanced Microphone input it is not intended for any other type connection This has a floating ground that is referenced to the mixing console it is plugged into and should not need ground lifting It is also unaffected by Phantom Powering on the Microphone input Make sure your XLR plug does not have the shell of the plug internally connected to signal ground or this will connect the system to chassis ground of the ABM and may cause problems with hum PUSH TO MUTE When pushed IN this button mutes the output from the preamp to the power amp mutes the output from the 0 1 socket and mutes the output from the LINE Out socket as well This leaves the output from the TUNER socket still available to allow muted tuning An LED is provided next to this switch to indicate when the amplifier is muted This function operates only from the front panel MUTE push switch
16. hat the setting of this may have to be re adjusted after modification of the EQ controls PUSH FLAT SHAPE With this button in its OUT position a fixed E Q is superimposed on the preamp to give a bright but punchy character to the sound Pushing this button IN returns the preamp to a Flat frequency response This function may also be controlled from a footswitch For the footswitch to operate this button must be in its OUT position VALVE DRIVE This routes the signal either through a clean Solid State amplification section control on zero or through a Dual Triode Tube amplification overdrive section in order to add either tonal character i e warmth with the control set at 9 o clock a slight edge in the sound at 12 O clock through to an increasing degree of Tube distortion overdrive as the control is advanced to maximum A Mix of these two amplification sections can be achieved with this control N B The degree of tube distortion provided by this control will also depend on the setting of the INPUT control VALVE DRIVE IN OUT This push button switches the valve drive section IN or OUT This function may also be controlled from the Ashdown 4 way footswitch For the footswitch to operate this button must be in its OUT position E Q IN OUT This push button switches the Equalisation section IN or OUT i e the Bass Middle and Treble controls plus the two sets of sliders placed between each of these This function may al
17. he volume of the note will be the same no matter how hard or soft you hit the string Compression also adds sustain to notes making them longer before they die away The Compression Level control adjusts the degree of compression applied to the bass signal For this to function correctly the Input Level must be correctly set as described in the INPUT CONTROL section left When the Input Level is correctly set there will be hardly any difference in volume between Compression IN and Compression OUT This is because the amplifier automatically compensates for the reduction in level that would be apparent when Compression is added by increasing the overall gain to restore the volume to its pre compression level because of this you may notice an increase in background noise with high compression settings COMPRESSION IN OUT This push button switches the Compression IN or OUT This function may also be controlled from the Ashdown 4 way footswitch For the footswitch to operate this button must be in its OUT position SUB HARMONICS This section produces Sub Harmonics an octave below the notes being played The level of these Sub Harmonics relative to the straight bass sound can be adjusted using the LEVEL control This is very effective in thickening the sound and you will find in use that only a small degree of this lower octave is required to really fill out the sound and provide a character that is not possible by any other means The de
18. ign of damage discard it and purchase a new one Always replace the power cord with one of the same type Moulded cords are the best choice with both plugs permanently fitted to the cord When using your amplifier and other equipment it is a good idea to connect to the supply using a unit known as an R C D These units are not expensive and offer the user additional protection against electric shock An electrical shop should be able to supply you with a suitable unit 3 Before Use Inspect your amplifier for damage before use Check each lead for damage before you plug them in to the amplifier and ensure that the loudspeaker is connected before you switch the amplifier on Never try to operate the amplifier without the speaker connected If you do serious damage to the amplifier will result which will be very expensive to repair Double check the connections you have made to your amplifier and make sure you have connected the speaker to the correct outlet socket that matches the cabinet you are using The impedance of the speaker is important and is usually shown on a plate affixed to the back of the cabinet so if the cabinet is 16R Ohms then you plug into the 16R outlet on the amplifier 4 Using the amplifier When you set the amplifier up for use it is important that you adhere to the following rules Place the amplifier away from sources of heat including radiators etc The amplifier itself will get hot in normal use Make s
19. n when a jack plug is inserted into the EFFECTS RETURN socket The EFFECTS SEND is situated after the EQ the Valve section the Compression and the Sub Bass Processor 4 WAY FOOTSWITCH SOCKET For the 4 way footswitch to operate it is essential that the corresponding front panel push buttons be in the OUT position This is a mono jack socket for connection of the supplied Ashdown 4 way footswitch only Always connect this prior to turning on the power to the amplifier as the footswitch derives its power from the amplifier and sends a serial data stream to the amplifier in order to operate the various functions Each of the 4 facilities available for selection is indicated by an LED that will light when that facility is selected from the footswitch SPEAKER OUTPUTS There are dedicated Speakon connectors for 2 4 and 8Q load speaker cabinet configurations It is important that the correct output or outputs are used to match the impedance load of your cabinets Please refer to the diagrams later in this manual OFF PREHEAT Use this switch to pre heat the valves bringing them up to the correct operating temperature before performing STANDBY FULL No signal is sent to the speakers when this switch is in the STANDBY position Switch to FULL when you are ready to perform USER MANUAL LITTLE BASTARD HEAD Cm SHIFT ass SHIFT BRIGHT MUTE 00460 4 Low 4 RETURN 9 MIDDLE 55
20. s in the up position and less deep frequencies in the down position The BRIGHT switch adds an overall brightness to the sound when in the up position MASTER This controls the overall output of the amplifier MUTE In the up position this switch mutes the out put of the amplifier useful for tuning etc VU METER The VU meter provides a visual indication of the output level of the amplifier REAR PANEL FACILITIES DI OUTPUT This XLR socket is used to connect the amplifier to a low impedance balanced input on a PA system or recording mixer The DI output is taken from a separate winding on the output transformer allowing the full character of the valve tone to be sent to the PA or recording console SPEAKER OUTPUTS There are dedicated 1 4 jack connectors for 4 and 80 load speaker cabinet configurations It is important that the correct output or outputs are used to match the impedance load of your cabinets Please refer to the diagrams later in this manual POWER This switch is used to switch the amplifier on and off RECORD YOUR INFORMATION You should us this space to record all the important information off the rear panel of your amplifier for future reference ji AT if USER MANUAL SPYDER 550 TOURING suze CABINET CONFIGURATIONS 427 smau SINGLE CABINET DUAL 80 CABINETS
21. so be controlled from the Ashdown 4 way footswitch For the footswitch to operate this button must be in its OUT position EQ CONTROLS These consists of BASS MIDDLE and TREBLE controls with two sliders placed between each control These can be used in a number of ways Firstly as a very simple Bass Middle and Treble tone control section as found on older traditional amplifiers This is done by leaving the two sets of sliders interposed between these controls set in their centre positions and using only the BASS MIDDLE and TREBLE controls to alter the overall tone Secondly if more control is required then the sliders can also be used to tailor the E Q in the regions between the main tone controls This provides a very versatile Equalisation section it is simple to understand and operate yet provides a wide degree of variation It retains the simplicity of a three control tone section but provides the flexibility of a graphic equaliser COMPRESSION Adding small amount of compression gives fat bottom end to the sound and allows a greater volume of amplification to be used without the playing peaks distorting the amplifiers output stage You will also find that this will add definition to your playing bringing out notes within a run more clearly as it evens out the dynamics of your playing A large amount of compression can be used as an effect but it will tend to reduce the dynamics in your playing to such an extent that t
22. the output level of the amplifier REAR PANEL FACILITIES DI OUTPUT This 1 4 stereo jack socket is used to connect the amplifier to a low impedance balanced input on a PA system or recording mixer The signal can be taken PRE or POST EQ see above ie with or without the tone shaping added by the EQ section of the amplifier LINE INPUT This 1 4 jack socket is used to connect the output of line level devices such as samplers and sound modules SPEAKER OUTPUTS There are dedicated Speakon connectors for 2 4 and 8Q load speaker cabinet configurations It is important that the correct output or outputs are used to match the impedance load of your cabinets Please refer to the diagrams later in this manual OFF PREHEAT Use this switch to pre heat the valves bringing them up to the correct operating temperature before performing STANDBY FULL No signal is sent to the speakers when this switch is in the STANDBY position Switch to FULL when you are ready to perform MIDDLE 85 TREBLE GAIN MASTER FAO esac 00000 6 MUTE PREPOST OUTPUT a CLOW HIGH SEND RIN MID SHIFT 8455 SHIFT FRONT PANEL VOLTAGE SERIAL SPEAKER OUTPUTS MIN LOAD 4 OHMS OUTPUT 550 WATTS RMS MAINS INPUT 700 V A MAINS INPUT 700 VA 6A 115V REAR PANEL SPYDER HEAD FRONT PANEL FA
23. ure that all the grilles on the amplifier are not obstructed in any way so that cooling air can circulate through the amplifier Do not place anything on or behind the amplifier that might restrict the flow of air This includes items of clothing or other equipment Do not place the amplifier in such a position where it may get splashed with liquid or water e g near tables of drinks or near equipment that contains water e g smoke and bubble machines Never stand bottles or containers of liquid on the amplifier If any liquid is accidentally spilled into the amplifier unplug it from the mains supply immediately and take the amplifier to a qualified technician for inspection Do not place objects on the amplifier that could fall inside and cause a malfunction e g coins tools etc 5 Sound level The level of sound or volume you choose to use will mainly be dependant on the size of the room you are playing in and you should use the volume level that gives you the desired results Always operate the amplifier at the lowest level you can in any given situation Each room will have a sweet spot Play at too low a level and the instrument will not react with the amplifier too high and the instrument will be unplayable In all cases you should use a level that you feel comfortable with The Human ear is a very sensitive instrument and can easily be permanently damaged by exposure to the high sound pressure levels that can
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