1.) LINE INPUTS (A and B) - The D1200 features balanced XLR 1/4" stereo line inputs. The left (A) and right (B) input signals are mixed together before they are routed to the internal amplifier

2.) THRU OUTPUTS (A and B) - Full range male XLR stereo line outputs. These outputs can be used to connect another subwoofer or send full range signal to your main PA loudspeakers

3.) GAIN CONTROL - This control adjusts the overall signal level at the input of the internal power amplifier. This control does not affect the signal sent to the THRU outputs

4.) SIGNAL INDICATOR - The green SIGNAL LED lights whenever signal is present at the D1200's inputs

5.) LIMITER INDICATOR - This yellow LED lights when the amp is near the clipping point and the limiter is engaged. If the LIMITER indicator lights frequently, turn down the GAIN control on the Auro subwoofer or turn down the signal at the source., until the indicator does not light anymore, or lights only occassionally with high signal peaks

6.) PROTECT INDICATOR - This LED lights RED when the amp overheats or other problems have been detected. If the PROTECT  indicator lights due to the level being too high, the amplifier will limit  the audio and lower the output level. Turn the GAIN control down until the PROTECT indicator is no longer lit. When the unit cools , the amplifier will raise the level back up

7.) LPF (Hz) - Adjusts the low frequency filter end range of the subwoofer from 80Hz -200Hz . This setting does not affect the signal sent to the THRU outputs

8.) DSP - The AURO D1200 DSP has three EQ contour curves: Normal, Deep,and Boost.

• The NORMAL setting produces the standard frequency response for the subwoofer and works best for most applications
• The BOOST enhances frequencies at 100 Hz to add punch and strengthen the kick drum frequency band.
• The DEEP setting extends the low frequencies down to widen the range of the subwoofer