How To - Setting Helix DSP's Input Gain & Input EQ Using Its Input RTA

In this video, we go over how to set the input gain on a Helix DSP and how to set the input EQ using its built-in input signal RTA. For setting the input gain, you will need a 0db sine wave. I use a 1000hz sine wave. For setting the input EQ, you will need a correlated (mono) pink noise track.


Side note: I know I have it backwards in the video, but you should be doing input EQ adjustments BEFORE you set and forget the input gain. For this car, we set the gain first, then the input eq (as seen), but what you don't see is that we went back after the fact and re-adjusted the input gain to account for the boosting of signal in the input EQ.

1) Find out your radios max undistorted volume number while playing a 0db sine wave

2) Play that same 0db sine wave with the DSP's outputs muted, and adjust the input gain knob(s) until the clipping light turns red. Input gain knobs location will vary on the model of Helix DSP you have

Input gain is now set.

Setting Input RTA

3) Play correlated pink noise through the radio at the same max volume from before

4) Follow the video, I'm not typing that all out :)