Welcome, Guest
Username: Password: Remember me

NOTE: This is a "Community" forum. Please be mindful that community members are here to help as part of a community effort. We therefore appreciate your effort in keeping this forum a happy place!

If you have a specific issue (e.g. hardware, failure) and want help from our support team, please use our tech support portal (Support menu - > Contact Us).
Thanks a lot of your help in making a better community.

TOPIC:

PWR-ICE 250 Noise comming through Tweeter and Mid 2 months 3 weeks ago #54809

  • scharno
  • scharno's Avatar
  • Offline
  • New Member
  • New Member
  • Posts: 4
  • Thank you received: 0
I use the digital input too but that doesn't change anything. Same noise as while using analog.

Please Log in or Create an account to join the conversation.

PWR-ICE 250 Noise comming through Tweeter and Mid 2 months 3 weeks ago #54815

  • snape6666
  • snape6666's Avatar
  • Offline
  • New Member
  • New Member
  • Posts: 9
  • Thank you received: 0
I understand you pain... Iam really pissed of too. 500€ for one plate amp and than it makes noices :D :D


But with the resistor hack it works fine for me... But unfortunately the support doesn't take the problem seriously. I corresponded with them several times last year and gave up in the end because my colleagues didn't understand or didn't want to understand. In the meantime, I suspect that the colleagues at MiniDSP cannot reproduce the error and that it may be due to the power grid in the respective country.

But if you sell an amp for 500€, the electronics should be able to buffer such fluctuations, but well....

Please Log in or Create an account to join the conversation.

Last edit: by snape6666.

PWR-ICE 250 Noise comming through Tweeter and Mid 2 months 3 weeks ago #54817

  • scharno
  • scharno's Avatar
  • Offline
  • New Member
  • New Member
  • Posts: 4
  • Thank you received: 0
Thanks for your answer,

then I'll give it a try. Just to be shure. I need 4 resistors and connect them parallel to the four inputs of my amps as shown in the
picture?



Thanks again
scharno
Attachments:

Please Log in or Create an account to join the conversation.

Last edit: by scharno. Reason: picture too big

PWR-ICE 250 Noise comming through Tweeter and Mid 2 months 3 weeks ago #54818

  • snape6666
  • snape6666's Avatar
  • Offline
  • New Member
  • New Member
  • Posts: 9
  • Thank you received: 0
correct :) you first can test it by just inserting the resistors in the connector befor soldering it in. And whats important, you need to shield every audio-cabel-pair, if they arent shielded already. I just used copper-tape, but its irremovably bond, alternatively you could use aluminium foil with Testa adhesive tape.

Please Log in or Create an account to join the conversation.

PWR-ICE 250 Noise comming through Tweeter and Mid 2 months 2 weeks ago #54837

  • scharno
  • scharno's Avatar
  • Offline
  • New Member
  • New Member
  • Posts: 4
  • Thank you received: 0
:laugh: :) Yippieh!!! It works!

So at last I'm happy. I shielded the cables and did the resistor hack. Now the noise is still there but to hear it I nearly have to stick my head into the speakers.
For all frustrated friends here is what I did in detail.

First I very, very and I mean very ;) carefully pulled the pins of each signal cable out of the little white plugs. Then I widened a piece of desoldering braid which in fact is nothing but a little copper hose, pulled it over the cables and fixed it with a small piece of self adhesive tape.





This done the noise was still hearable but a little bit quieter. Then I tried 100 Ohm resistors on each channel but that didn't change anything. Next I used 150 Ohm and believe it or not the hum and the sweeping noise was nearly gone. Maybe the noise problem depends on the local current but for Germany these two workarounds do the job. Disconnecting any grounds did not work nor did the separation of power and signal cables show any changes.

Oh, another very important information!!!
If there is any television in your home pull out the antenna cable and check if this reduces the hum level. If so get yourself a sheath flow filter (hope Google translated correctly).
Attachments:

Please Log in or Create an account to join the conversation.

Last edit: by scharno. Reason: forgot something

PWR-ICE 250 Noise comming through Tweeter and Mid 1 month 3 weeks ago #55219

  • xnwrx
  • xnwrx's Avatar
  • Offline
  • Premium Member
  • Premium Member
  • Posts: 103
  • Thank you received: 23
OK, I was really fed up with my problems with my Power-ICE plate amplifier module..
All four I own are subject to noise issues with different symptoms. All four generate the 50/100 Hz (Europe) noise, which is however very very low and not hearable except when listening close to the driver itself. I would say normal for an amplifier. All four generate high frequency random noise hearable through the tweeter. Again very low and not really a problem (94dB/W/m drivers).
Now the problems : two of them generate sweep sine noise in the 100 Hz 1kHz band. I would say some kind of frequency hooking, sweeping with a 10 to 20 seconds period. This one is hearable during normal listening, annoying and disturbing. And the worst, one module was reluctant to generate signal with correct level, sometime it worked, sometime level was down by few dBs, sometime more noisy with level down to 10 or 20 dB...Tapping on the plate sometime cure the problem...
That said, I removed the 8 wires signal flat cable and decided to solder wires straight to the PCB connectors. I used RG179 coax cable for the audio signal, and it works !
No more sweep sin noise, no more relaibility issues, everything is now perfect.
MiniDSP Power-ICE is really a great product, it would really deserve better manufacturing quality.


Attachments:

Please Log in or Create an account to join the conversation.

Moderators: devteam