Thank you for purchasing the Hi-End MUSES® Electronic Volume Control Board from Academy Audio Inc. The Hi-End MUSES® Electronic Volume Control board is a complete ready to use two channel volume control unit that requires a power supply and control signals to operate.
Refer to Figure 1 for mechanical dimensions and mounting holes location. To install multiple Volume Control boards use at least 1.000” long spacers, and position the boards on top of each other. 3. Power Connection The Volume Control board requires the following power sources to operate: 1.
IMPORTANT: When de-energized, the muting relay RL1 disconnects the outputs from the audio output circuitry and connects the board audio outputs to their respective common lines. It is recommended to energize the muting relay after a small delay of about 1 second from the application of power to the board.
Feel free to try other capacitor types in place of C14, C17, C18, C20, C21, and C25. Make sure the voltage rating is not lower than 25V. Good results may be obtained using quality bi-polar audio electrolytic capacitors and polypropylene film capacitors. Provide enough time for break-in before evaluating the results of your experiments.