40 Watt Mixer Amplifier with Media Player Owners Manual Model #USB-80 ©2009 MCM Electronics MCM Custom Audio MCM Electronics Centerville, Ohio www.mcmelectronics.
USB-80 Mixer Amplifier Owners Manual SAFETY INSTRUCTIONS • • • • • • • • • Please be sure to read all the instructions carefully before using this product. As several safety messages are printed in this instruction sheet, please be sure to observe these as they are important. It is recommended that this manual be kept for future reference. Do not store or use this device in dusty or humid locations, or in direct exposure to sunlight.
USB-80 Mixer Amplifier Owners Manual Front Panel Description 1. Output Power Meter Displays relative output level of the amplifier. Left most yellow indicator acts as power indicator for the amplifier and will remain continuously lit when power is turned on. 2. Input #1~3 Level Controls Adjusts individual level input for the three mic inputs. Fully counterclockwise position is off for each input. This adjustment affects all inputs as fed to the amplifier and the REC output. 3.
USB-80 Mixer Amplifier Owners Manual 13. Play/Pause Depressing this button will start playing the current file displayed on the screen from the beginning. Depressing this button while a song is playing will pause that song at its current point. Depressing again will resume play from the paused point. Repeatedly depressing the Play/Pause button will toggle the player between Pause and Play action. 14.
USB-80 Mixer Amplifier Owners Manual Speaker Connection It is possible to connect any number of speakers to this amplifier, from a single unit to 20 or more. However, it is critical that proper wiring configurations are used, otherwise potentially poor performance, and likely permanent amplifier damage will result. Generally speaking, speaker systems can be classified in two groups.
USB-80 Mixer Amplifier Owners Manual Low Impedance Speakers (cont) In certain cases, it may be necessary to use a combination of series and parallel wiring to achieve the desired impedance. The adjacent illustration demonstrates a common method of connecting four 8Ω speakers, and maintaining a combined 8Ω load. In this case, speakers are separated into pairs, connected in series. Each series pair yields 16Ω. Since both sets are then connected in parallel, the net impedance is 8Ω.
Owners Manual USB-80 Mixer Amplifier 70V Distributed Speakers These high impedance speakers are typically used in application requiring a large number of speakers, or when extremely long speaker wire runs are necessary. In this application, all speakers are connected in parallel, and may be wired in a "daisy chain" configuration. It is not necessary to "home run" wire from each speaker back to the amplifier. Shown below is a very typical arrangement of (14) 70V speakers connected to the USB-80 amplifier.
USB-80 Mixer Amplifier Owners Manual Installation of the Amplifier • Be certain that the power is removed from the amplifier • Locate the amplifier in a suitable shelf or tabletop. If positioned with other components, it is not recommended that other devices be located on top of the amplifier.
Owners Manual USB-80 Mixer Amplifier Using the IR Remote Control The included IR remote control will allows remote operation of all front panel controls, plus additional functions. Shaded area buttons labeled 0~9 –Allow individual track selection by number. Simply key in the desired track.
