The M650-GM produces a completely flat audio output without any factory time delay or equalization, eliminating the need for summing devices, an audio correction DSP or the removal of the factory audio compensation microphones. 

• 100% Plug & Play

Utilizing a 128 bit per channel floating point DSP and 192 kHz 32 bit DAC, the M650-GM produces a 6 channel analogue output (Front L/R, Rear L/R, Sub and Centre) with a peak voltage of 6.3V and a S/N Ratio of 112dB. All warning chimes and audible turn signal indications are attenuated to factory levels and, along with Onstar®, Navigation prompts and Bluetooth, are passed to the proper output channels, eliminating the need for an external speaker. The unit provides a 500mA output for controlling aftermarket devices and, additionally, retains the factory 3 band equalizer (high, mid and bass).

For use with 3^rd party digital sound processors, the M650-GM includes a variable TosLink (optical) and S/PDIF (coaxial) digital output which may be used simultaneously with the analogue outputs, or by themselves. The variable digital output allows for the system volume to be controlled via the factory radio and steering wheel controls without the need to access any 3^rd party controller.

 For ease of use, the M650-GM is configurable through dip switch settings.  User selectable features of the M650-GM are:

- Time alignment to driver (Full-Sized SUV and Truck Only) or no time alignment (Analog output only)

- Full Scale output (0 db) vs attenuated output (-12 db) (When attenuated, output is reduced to ~3v for extended headroom)

- Factory Bass control becomes a Subwoofer Level Controller or Controls Bass for the entire system (Analog output only) – eliminates the need for a sub control knob!

- Loudness control for extended bass response at low levels or loudness off (Analog output only)

NOTE: BOSE-equipped systems will always be compatible with this interface.