Amplifier Features
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1.Standby LED and
2.Power Switch
Press the power switch in to turn on the amplifier. As a general rule, turn it on after your preamplifier or receiver is turned on. When you have finished listening for the night, turn it off before your preamplifier or receiver.
After a period of inactivity (i.e. with no input signal), the amplifier will automati- cally turn itself to Standby mode, where it is effectively off. It can however, turn back on automatically when an audio input signal is present, if a 12 VDC trigger voltage is applied to the Trigger inputs, or if the Start button is pressed.
3. Start button
Press this once to enter the Auto EQ mode (if the sub is out of Standby mode). Press and hold it down for several seconds to enter the Manual EQ mode. See page 12 for more de- tails on this and the EQ controls.
4. LED display
These LEDs are used during the Auto EQ and Manual EQ procedures.
5. Microphone Input
This is where you plug in the supplied linear measurement microphone when you want to use the Auto EQ mode.
(Only use the supplied microphone.)
6. Equalizer Authority
This control's primary purpose is to adjust the EQ Authority. During normal listening, you can adjust the overall EQ from none (ccw, 0%), to fully equalized (cw, 100%). For example, if your first band has a 6 dB boost, setting this control to 50% would make it boost only 3 dB.
This control is also used during the Manual EQ mode to adjust each of the four internal EQ bands, and allow you to add "color" to the sound as desired.
7. Phase Control
This control changes the relative phase of the subwoofer with respect to your other speakers. Use this control to help blend the subwoofer with the rest of your system. This is accomplished by adjusting the control in small incre- ments as you listen for the most bass at your listening position. As a final trim, readjust the Crossover Frequency and Volume controls after the Phase has been set.
8. Crossover Frequency
This controls the high frequency cutoff point. With the control at the 100 Hz mark, the subwoofer will reproduce frequencies up to 100 Hz. If the control is set fully clockwise, the crossover
is bypassed and the subwoofer will reproduce a frequency range up to
115 Hz. With the control fully counter- clockwise the subwoofer reproduces a narrow range, up to 30 Hz.
User's Manual
