C10 C20 Manual - Public Address Amplifiers
Contents
1. Bogen Models C10 and C20 public address amplifiers are rated at 10 and 20 watts respectively and are UL and C UL listed The amplifiers accommodate low impedance microphones and high impedance auxiliary sources A front panel selector switch offers a choice of either two low impedance balanced microphones MIC1 MIC2 or one micro phone and one auxiliary input MIC1 AUX The AUX input can be muted when a customer supplied SPST nor mally open switch is used for microphone precedence Independent volume controls and a treble control for tonal balance are provided Balanced and unbalanced outputs are provided for 4 8 and 16 ohm speakers and for 25 and 70 volt constant voltage systems An accessory transformer Bogen Model WMT1A can be installed to provide input and output matching to a telephone line The amplifiers operate from a 120V AC 60 Hz source A thermostat enclosed in the power transformer protects the unit against overloads The amplifier also accommodates a transformer balanced TEL page input with VOX detector for muting the AUX Front Panel MIC1 MIC2 AUX TREBLE a POWER Classic CtEI 1 MIC2 AUX Mode Switch Switch selects either the MIC2 or AUX connection as the active input 2 MIC1 Level Control Individual level control for dedicated microphone input 3 MIC2 AUX Level Control Individual level control for a dedicated microphone input or for an auxi2. be repaired by the Bogen Factory Service Department same address as above or call 201 934 8500 The parts and labor involved in these repairs are warranted for 90 days when repaired by the Bogen Factory Service Department All shipping charges in addition to parts and labor charges will be at the owner s expense All returns require a Return Authorization number 07 22 2008 BOGEN COMMUNICATIONS INC 50 Spring Street Ramsey NJ 07446 U S A Tel 201 934 8500 Fax 201 934 9832 www bogen com
3. on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufac turer Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped IMPORTANT CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION TO PREVENT THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL The lightning flash with arrowhead sym bol within an equilateral triangle is intended to alert the user to the pres ence of uninsulated dangerous volt age within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equi lateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompa nying the appliance Contents DESCRIPTION ccccsssssssssssssecesssscssssessssseesssesssseessesesseesssnceessesessasse
4. Classic Series Public Address Amplifiers C10 amp C20 Models Installation and Use Manual 2009 Bogen Commun ications Inc All rights reserved ecifications subject to change without notice 54 5978 01B 0901 Notice Every effort was made to ensure that the information in this guide was complete and accurate at the time of printing However information is subject to change Important Safety Information WARNING To Reduce The Risk of Fire Or Electric Shock Do Not Expose This Apparatus To Rain Or Moisture Always follow these basic safety precautions when installing and using the unit SD oF ew eS Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with dry cloth DO NOT block any ventilation openings Install in accor dance with the manufacturer s instructions Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or grounding type plug A polarized 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 the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet Protect the power cord from being walked
5. ble via a tilt open door e Heavy gauge steel construction Technical Specifications Power Output RMS C10 C20 Distortion Frequency Response Hum and Noise MIC Input AUX Input TEL Input Input Sensitivity MIC Lo Z Balanced AUX TEL Outputs Output Connections Input Connections MIC TEL AUX Controls Tone Control Power Requirements C10 C20 Dimensions Product Weight C10 C20 10W 20W Less than 1 Rated Power Output 70 Hz 16 kHz 1 dB 20 Hz to 20 kHz 55 dB below rated output 70 dB below rated output 70 dB below rated output 600 uV 85 mV 75 mV 4 8 16 ohms 25V and 70V Screw terminal strip Lo Z screw terminals RCA jack MIC1 MIC2 AUX switch selected TREBLE VOX TEL TREBLE 10 dB to 0 dB 10 kHz 120V AC 60 Hz 38W 50W 11 3 8 W x 2 7 8 H x 7 3 8 D both models 5 Ib 6 Ib Limited Warranty Exclusion of Certain Damages Bogen Classic Series Amplifiers Models C10 and C20 are warranted to be free from defects in material or workmanship for two 2 years from the date of sale to the original purchaser Any part of the product covered by this warranty that with normal instal lation and use becomes defective will be repaired or replaced by Bogen at our option provided the product is shipped insured and prepaid to Bogen Factory Service Department 50 Spring Street Ramsey NJ 07446 USA The product will be returned to you freight prepaid Thi
6. c is restored Microphone Precedence Muting the AUX channel can be accomplished with a customer supplied normally opened SPST switch which must be connected to the MUTE terminals When the contacts are closed the microphone will have precedence over the AUX input TREBLE Use the TREBLE control to adjust the tonal balance of the amplifier output Rotated fully clockwise there is no effect Rotate counterclockwise to attenuate the TREBLE of the audio Overload Protection The amplifier output is protected against overload and shorted speaker lines by an electronic shut down circuit and a thermostat enclosed in the power transformer If the protection operates the amplifier will have no output Set the Power switch to off and wait a reasonable amount of time for the protection to reset If the protection trips again have the problem investigated by a qualified technician Accessories WMT1A Line Matching Transformer Hi Z 10k ohm primary impedance e Lo Z 600 ohm secondary impedance balanced with center tap e Matches high impedance unbalanced or low impedance balanced signals Jumper selection allows line level signal to microphone level signal conversion RPK35B Rack Panel Kit RPK35B adapts Classic Series amps Models C10 and C20 for 19 rack mounting 2 rack spaces 3 1 2 e Heavy gauge steel construction In Wall Mounting e Cabinet fits between standard 2 x 45 on standard 16 e Controls are accessi
7. liary input depending on input mode selected 4 Treble Control Controls the amount of attenuation to treble frequencies above 10 kHz 5 Power AC Power switch Illuminates when ON Rear Panel a et AUX POWE GND 40780 160 25v 70 BOGEN MUTE _MIc2 MIC1 COMMUNICATIONS INC 269000009 noe 200000090 CLASS 2 WIRING ACCEPTABLE C10 0 2 GND 10 4 AUX Li PN NE O oge ENCLOSED IN VOX TEL AUX GND CIAL ER COMME TRANSFORMER AMPLIFIER 1 Amplifier Output Screw terminal strip containing all available speaker outputs 2 Mute Input Screw terminal input for microphone precedence 3 MIC1 MIC2 Screw terminal input for Lo Z balanced microphone signal 4 AUX Power A grounded unswitched AC convenience receptacle with 300W maximum capacity is provided for external equipment 5 VOX SENS Control Variable control for adjusting the TEL input signal level trigger point for automatic muting of the AUX input 6 TEL Volume Control Adjusts the telephone paging level 7 AUX Input RCA unbalanced high impedance input AUX is switch selectable with MIC2 8 TEL Input Screw terminal input for 600 ohm balanced telephone signal Installation Power and Grounding The AC line cord has a three prong plug which must be plugged into a three wire grounded 120 volt 60 Hz outlet Note It is important to ground the amplifier pro
8. ontrols to the minimum counter clockwise position if the inputs are not used AUX For one auxiliary input the MIC2 AUX selector switch should be in the AUX position The AUX control is used to adjust the volume of the auxiliary input Rotate the control clockwise to increase volume and counterclockwise to decrease it Turn the control to the minimum counter clockwise position if the input is not used TEL The TEL volume control on the rear panel adjusts the telephone paging level It does not affect the microphone level Rotate the control counterclockwise to decrease the level Rotate the control clockwise to increase the level Turn the control to the minimum counter clockwise position if the input is not used VOX SENS The VOX SENSitivity control should be set so that only the desired TEL signal is above the threshold level while noise and unwanted signal is below it When an input signal such as a voice is detected the AUX channel will be muted To adjust the sensitivity of the circuit 1 Rotate the control fully clockwise While making a page announcement and talking at a low level the sound should not be choppy nor missing parts of words If it is choppy or if intelligibility is poor rotate the con trol counter clockwise to the point where the sound is clear and crisp but not to the maximum counter clockwise position 2 If the background music shuts down when no page is in progress rotate the control clockwise until the musi
9. perly Input Connections Microphone Connections Two low impedance balanced microphones may be connected simultaneously to the corresponding screw termi nals on the rear panel of the amplifier Microphone Precedence A built in circuit provides microphones precedence over the AUX channel For this function a customer supplied normally open SPST switch must be connected to the MUTE terminals When the contacts are closed the micro phone will have precedence AUX The AUX inputs may be used for any signal source having a line level greater than 85mV output TEL A balanced isolating transformer input for a telephone line is provided A 600 ohm telephone line may be connected to the TEL terminals Output Connections Speakers General The amplifier may be used with most conventional speaker systems Connect one speaker lead to the screw ter minal that corresponds to the total impedance or proper voltage of the speakers used in the system and the other lead to the COM terminal For balanced output lines remove the link between the COM and GND output termi nals Class 2 wiring may be used Operation POWER The front panel ON OFF switch applies power to the amplifier MIC1 MIC2 For two microphone inputs the MIC2 AUX selector switch should be in the MIC2 mode The MIC controls are used to adjust the volume of the microphone inputs Rotate the controls clockwise to increase volume and coun terclockwise to decrease it Turn the c
10. s warranty does not extend to any of our products that have been subjected to abuse misuse improper stor age neglect accident improper installation or have been modified or repaired or altered in any manner whatsoever or where the serial number or date code has been removed or defaced THE FOREGOING LIMITED WARRANTY IS BOGEN S SOLE AND EXCLUSIVE WARRANTY AND THE PUR CHASER S SOLE AND EXCLUSIVE REMEDY BOGEN MAKES NO OTHER WARRANTIES OF ANY KIND EITHER EXPRESS OR IMPLIED AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED AND EXCLUDED TO THE MAXIMUM EXTENT ALLOWABLE BY LAW Bogen s liability arising out of the manufacture sale or supplying of products or their use or disposi tion whether based upon warranty contract tort or otherwise shall be limited to the price of the product IN NO EVENT SHALL BOGEN BE LIABLE FOR SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO LOSS OF PROFITS LOSS OF DATA OR LOSS OF USE DAMAGES ARISING OUT OF THE MANUFACTURE SALE OR SUPPLYING OF PRODUCTS EVEN IF BOGEN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES OR LOSSES Some States do not allow the exclusion or limitation of incidental or con sequential damages so the above limitation or exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from State to State Products that are out of warranty will also
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