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User’s Manual

P/N

18800

Commercial Audio 60-Watt 2-Channel

70V/100V Mixer Amplifier

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Summary of Contents for 18800

Page 1: ...User s Manual P N 18800 Commercial Audio 60 Watt 2 Channel 70V 100V Mixer Amplifier ...

Page 2: ...ODUCT OVERVIEW 6 Front Panel 6 Rear Panel 7 CONSTANT VOLTAGE VS 8 OHM SPEAKER SYSTEMS 7 SAMPLE CONNECTION DIAGRAM 9 CONSTANT RESISTANCE INSTALLATION 9 CONSTANT VOLTAGE INSTALLATION 11 BLOCK DIAGRAM 13 SPECIFICATIONS 14 TECHNICAL SUPPORT 15 REGULATORY COMPLIANCE 15 Notice for FCC 15 Notice for Industry Canada 16 ...

Page 3: ... ventilates excessive heat through the slots and openings in the case Do not block or cover these openings Ensure that the device is in an open area where it can get sufficient airflow to keep from overheating Do not expose this device to excessive vibration Do not place or install this device in an area where it can be exposed to excessive amounts of dust humidity oil smoke or combustible vapors ...

Page 4: ...r modify this device Ensure that the terminal cover is installed over the speaker terminals before applying power These terminals carry high voltage and can cause severe electric shock if touched during operation Always set the Master Volume knob to the minimum position before applying power to the amplifier Transient voltage spikes during power on can cause loud popping in the speakers which can ...

Page 5: ...trols for MIC 1 MIC 2 AUX 1 and MIC 3 AUX 2 Treble and bass controls MIC 1 input has priority 4 ohm and 8 ohm constant resistance output options 70 volt and 100 volt constant voltage output options 100 240 VAC 50 60 Hz input voltage range CUSTOMER SERVICE The Monoprice Customer Service department is dedicated to ensuring that your ordering purchasing and delivery experience is second to none If yo...

Page 6: ...t Monoprice Customer Service for a replacement 1x Commercial Audio 60 Watt 2 Channel 70V 100V Mixer Amplifier 1x User s Manual PRODUCT OVERVIEW Front Panel 1 MIC 1 Mixing Volume Control 2 MIC 2 AUX 1 Mixing Volume Control 3 MIC 3 AUX 2 Mixing Volume Control 4 Bass Level Control 5 Treble Level Control 6 Master Volume Control 7 Power LED Indicator 8 Power Switch ...

Page 7: ... to raise the voltage and lower the current on the transmission line At the speaker end a step down transformer converts the signal back to a normal speaker level voltage This reduces power loss during transmission which allows for the use of longer speaker wire runs using smaller gauge wire Additionally a constant voltage speaker system allows for the use of multiple speakers on each channel with...

Page 8: ...and with a constant voltage system you consider first the RMS output wattage of the amplifier This should be reduced by 20 to compensate for insertion loss For example if using a 100 watt amplifier the total load from speakers should not exceed 80 watts Each individual speaker on a given channel is set to a value such that the total does not exceed the rated power less 20 You do not need to worry ...

Page 9: ...before making any electric audio connections 2 Place the amplifier in its intended location 3 Using speaker wire not included create a speaker array with a 4 ohm or 8 ohm overall load This can be a single 4 ohm or 8 ohm speaker or a number of speakers calculated to produce a 4 ohm or 8 ohm load For example you could connect two 4 ohm speakers in series to create an 8 ohm load Alternatively you can...

Page 10: ...plug a dynamic microphone into the MIC 3 Input 13 or plug a line level device such as a CD player into the AUX 2 Input 11 If using the MIC 3 Input set the AUX 2 MIC 3 Switch 12 to the MIC 3 position otherwise if using the AUX 2 input set it to the AUX 2 position 8 Ensure that the Master Volume Control 6 is turned fully counterclockwise to the minimum position 9 Set the MIC 1 Mixing Volume Control ...

Page 11: ... a value that is equal to or less than 48 watts in total 80 of the 60 watt amplifier power rating For example if you have 4 speakers each one should be set to a value of 12 watts or less Note that you do not need to worry about making the total as close as possible to the limit just ensure that the total does not exceed the limit Also note that the speakers do not have to be set to the same wattag...

Page 12: ...t set it to the AUX 2 position 9 Ensure that the Master Volume Control 6 is turned fully counterclockwise to the minimum position 10 Set the MIC 1 Mixing Volume Control 1 the AUX 1 MIC 2 Mixing Volume Control 2 and the AUX 2 MIC 3 Mixing Volume Control 3 knobs to the midpoint 11 Ensure that the Power Switch 8 is in the OFF position 12 Plug the AC Power Cord 9 into a nearby AC power outlet then fli...

Page 13: ...13 BLOCK DIAGRAM ...

Page 14: ...itivity 5mV Auxiliary Input Sensitivity 350mV Frequency Response 80 Hz 16 kHz 3dB Signal to Noise Ratio 75dB Total Harmonic Distortion 1 Bass Tone Control 10dB at 100 Hz Treble Tone Control 10dB at 10kHz Priority Function MIC 1 has priority Protect Circuits High temperature overload short circuit Input Power 120 VAC 50 60 Hz Power Consumption 80 watts Dimensions 11 2 x 7 4 x 2 6 284 x 188 x 67 mm ...

Page 15: ... without Monoprice s authorization may result in the equipment no longer complying with FCC requirements for Class B digital devices In that event your right to use the equipment may be limited by FCC regulations and you may be required to correct any interference to radio or television communications at your own expense This equipment has been tested and found to comply with the limits for a Clas...

Page 16: ...ment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Notice for Industry Canada This Class B digital apparatus complies with Canadian ICES 003 Cet appareil numérique de la classe B est conforme à la norme NMB 003 du Canada ...

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