AzureX

Swapped to a 4v preout hu same issue.

Definitely not user error. I swap out the JAD1200.1D for my old hifonics amp and follow the same procedure (instructions that came with the dd1) and it works, distortion light shows up. With the JAD the distortion light never lights up. Guess I would have to make a video of it. RCA voltage is 1.8v at max clean volume. I can get it to distort while finding the hu max clean volume through the RCAs just not after I hook into the JAD1200.1D.

They have no explanation to why it doesn't work though?? What do you mean set to the certified voltage??

I have even tried my HU in another car but with a different amp so I am pretty sure it has something to do with the NVX JAD 1200.1

Yea I don't get it either. the DD-1 works fine on 4 other brand amps and works just like advertised so there's definitely nothing wrong with the DD-1.

I tried without it hooked up same result.

I will try that tell you in a minute.

It is set in the middle per the instructions but yes i have also turned it all the way up with the same result.

Ahh crap that sucks for me.

Heard anything yet??

Thanks a lot man. I most definitely will.

What's the rest of your setup? You can't get distortion from the HU using tracks 1&2? Or you're just not getting it from the amp after finding the HU distortion point? HU is a AVH270, Amp is a NVX JAD 1200.1. Sub is a Sundown SA-15 D2 wired to 1 Ohm. I distort on the HU at 38(40Hz track 1) 39(1kHz track 2) so max clean volume is 37. I hook into the amp's speaker outputs respectively with the sub sonic filter set to the lowest(20Hz) and the low pass filter set to the highest(320Hz), I can max the gain out with the HU set to the max clean volume (37) with the 40Hz -5 dB tone. I get the signal light and the 40Hz light but never a distortion light. it flickers like the OP stated sometimes but goes away without touching the gain. I've done three other system with the dd-1 and actually just did a forth today. Of course they had different equipment but it should still work on mine.

I also have this same issue as the OP and have a Pioneer AVH HU. Doesn't seem like there was any way to make it work. I definitely followed the instructions this isn't the first time using it and the DD1 worked flawless on all the other amps and HU's. I just don't get it. Any suggestions?