Maestro Subwoofer Controls
The electronics of the Maestro performs the following functions:
Input Level: This controls the volume of the Maestro when using the Right and or Left inputs. The volume needs to be set at the same volume as your main speakers to get a seamless blend. When using the Theater input, the volume on the Maestro is bypassed and will be controlled by your processor/receiver.
Lowpass Filters A & B: Each filter has a 12db/oct roll off and is used to set the upper cutoff point of the subwoofer. Normally, you will set both filters at the same frequency for a 24db/oct roll off. In some systems it may be advantageous to be able to independently adjust these filters for the optimum blend.
Phase Control: The phase is variable from 0-180 degrees. Correct phase is dependent on positioning of the sub relative to the main and the listening position. The correct phase setting will yield the greatest level of bass.
Left & Right Line Level Inputs: Use either or both of these inputs. You will need to set the Input Level and Lowpass Filters A & B.
Theater Input: Connect to this input from your sub output on your receiver, preamp or processor. Set Lowpass Filters A & B to 250Hz. Input Level is bypassed and volume is controlled from your system's subwoofer volume control.
Left & Right High-Pass Outputs: Works with the line level inputs, they cut the frequency of your main speakers off at 100Hz with a 12db roll off. Rarely used we suggest using the optional passive high-pass filters instead.
Speaker Level Out: To ACI Maestro Subwoofer. Connection to the subwoofer is via a single length of speaker cable (see diagram below). Mount the amplifier near your source components for easy access to the front panel adjustments.
LED Light: It is red for a few seconds as the amp warms up. The light will turn green when the amp is ready, even if there is no signal going to the amp.
On/Off Switch: Used to turn the amp on and off. Normally the amp is left on all the time. When not playing, it draws about the same about of power as a nightlight.
Power Cord: The cord is non-detachable and can be plugged into any standard two-prong outlet.
Miscellaneous:
- A limiter and current sensing feedback circuitry protect the driver from being overdriven and reduce distortion.
- The discreet outputs of the amplifier deliver over 500 watts RMS to the woofer with extremely low distortion.
- A temperature switch monitors the output devices. In the event of excess heat the switch will shut down the circuitry to prevent damage. Once the heat sinks cool the power will be restored. Because the electronics have been designed and "tuned" to the woofer and cabinet, the Maestro offers incredible performance in a relatively small cabinet.