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Noise problem on DDRC88BM 5 years 2 months ago #36258

  • Gnomen
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I have a DDRC88BM which is very noisy.
It is quite high hiss/pink noise on all channels. It is also present without any sources connected. Also tested with only one speaker connected. No remote contra cable. Tested with several poweramps and several different signal cables between dsp and poweramp. Nothing makes any diffference. Also on input channel 1, there is som additional noise. It is a noise which best can be compared to alternator-noise in a car. My speakers has a crossover frequency at 900hz, and the noise is hard in both tweeter and woofer, so the noise has most likely a frequency around this pointer.
This is only on input 1. Every outputs/Dirac channels routed from input1 is infected with the noise. If signal and cable connected to input1 is moved to any other inputs, the noise is gone.
What is the problem on this dsp unit? What may cause this defekt?

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Noise problem on DDRC88BM 5 years 1 month ago #36366

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@ Gnomen

Hard to say what could be the issue here... Maybe an issue with the way you have your gain structure?
Maybe start a tech support tix with your configuration file loaded inside the DSP along with the DDRC-88BM setup?

I've got the feeling that it could be:
a) Very high level of balanced out (8Vrms) feeding some consumer AV amp with high sensitivity (i.e. worst case scenario for gain structure)
b) Wrong routing maybe?

We've got a lot of units in the field, so I'm sure that we'd be able to figure out somehow. :-)
PLease start a tech support tix to take it from there (support - > CONTACT US)

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