miniDSP/miniDIGI/miniAMP noise problem - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 26th September 2013, 10:01 PM   #1
Defo is offline Defo  Norway
diyAudio Member
Join Date: Nov 2008
Default miniDSP/miniDIGI/miniAMP noise problem


Since I don't recieve any response from miniDSP support, I'll try here..

Two problems:

- High noise in speakers connected to the miniAMP. Noise is redused considerably when miniDSP is distached from the setup (ie. running only the miniDIGI and miniAMP).
When powering up the whole module, the noise is at an acceptable level, but as soon as an audio signal is present, the noise is elevated to a much higher level, and stays so until I power down the module again. I use the optical input on the miniDIGI.

- Volume potentiometer not working as it should (volume is high, even though the potentiometer is turned all the way down, in which case it should be completely silent).

Pictures of each board attached.

Help please?
Attached Images
File Type: jpg 20130923_193128-1.jpg (512.2 KB, 93 views)
File Type: jpg 20130923_193136-1.jpg (607.8 KB, 87 views)
File Type: jpg 20130923_193143-1.jpg (566.7 KB, 83 views)
  Reply With Quote
Old 26th September 2013, 10:37 PM   #2
diyAudio Member
Join Date: Sep 2008
Location: Bristol
one little thing to note, the volume potentiometer never goes to zero. Volume should be controlled before or after. Bit stupid design.

I just got my dsp/digi/amp working, whats your power source?
  Reply With Quote
Old 26th September 2013, 10:48 PM   #3
Defo is offline Defo  Norway
diyAudio Member
Join Date: Nov 2008
Thanks for the reply.

I've tried several different power supplies, so it doesn't seem to be an issue with the power adapter. The noise is still quite high.

The miniAMP is connected to a pair of horns with compression drivers, so some noise is to be expected. But I experenced less noise with other amplifiers that inhibited quite low s/n ratios, so I would expect the miniAMP more or less silent due to its pure digital design.

While it does seem to be more of an issue with the miniDSP rather then the miniAMP, since the noise is only present when an audio signal is present (that is, I start playing some music). Before that, the noise is quite low.
  Reply With Quote
Old 27th September 2013, 08:48 PM   #4
diyAudio Member
Join Date: Apr 2012
If it is the MiniDSP volume, check out this guide:

Potentiometer Volume control down to -100dB

MiniDSP :: Topic: Potentiometer Volume control down to -100dB (1/1)
  Reply With Quote


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Minidsp/MiniDigi/Miniamp + MiniDsp/MiniAmp gmant123 miniDSP 0 10th October 2012 06:11 PM
Stereo 3-way with minidigi/minidsp 2x8...minidigi jumper/4x10 routing configuration? architect7 miniDSP 2 23rd March 2012 08:31 AM
MiniDSP/miniDIGI/miniAMP article JohnR miniDSP 4 1st November 2011 10:12 AM
MiniDSP, MiniDIGI, MiniAMP 2.1 Setup Franz Gysi Digital Line Level 22 3rd April 2011 09:53 AM
miniDIGI + miniAMP: An SPDIF amplifier minidsp miniDSP 10 20th March 2010 05:40 AM

New To Site? Need Help?

All times are GMT. The time now is 10:47 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.
Copyright 1999-2015 diyAudio

Content Relevant URLs by vBSEO 3.3.2