Noisy Signal from Head Unit when Amplified

shoegazer

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I'm encouraged that increasing the signal from the HU resulted in less overall noise.

My tin-foil-hat suggestion would be to reset the HU to factory presets and do the calibration again.

Also... how are you playing the test file for the calibration? If it's via a smartphone; then there's a fair margin for error with the volume settings. If you can play the file via a memory stick through the USB; there'd be less potential gain issues.

But 100% glad you're getting closer to what ya' want. What a pain-in-the-ass, though.
 

CSR_

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So, just read both threads as I have the same problem. In mi case, I tried many things too, originally thinking it was a ground loop of some sort. (so I checked all my wiring) and tested grounds with DMM and that wasn't the problem. BTW, I'm running Active all DD gear: Digital Signal Integrator Dsi1, B3 bullet tweets on a D4.60, SS4b on VOm6.5's, 0 gauge Skyhigh OFC and knukonceptz Krystal RCAs. So cheap gear is not the problem. However I am also getting that hiss like noise more audible from the tweeters than anything else. After going crazy looking for a fix I decided to try something simpler and connected the amp directly to the battery +&- with one speaker connected to it and the hiss is still there... Which leads me to the conclusion that it's naturaly coming from the amp and maybe because of the S/N R of speakers or something and the D class boards it's simply audible? Anyway just thought I'd share my experience and wondered if you ever came across a fix or just decided to toss the project? Lol
 

                           











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