sonic impact t-amp in car? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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
Reply
 
Thread Tools Search this Thread
Old 18th February 2006, 05:03 PM   #11
DcibeL is offline DcibeL  Canada
diyAudio Member
 
DcibeL's Avatar
 
Join Date: May 2003
Location: Saskatchewan
Sorry, Ractis. It was an LD1085V12. I figured at least a 2A supply is needed, so a 3A regulator should do the trick.
__________________
The power of Science compels you!
  Reply With Quote
Old 18th February 2006, 07:32 PM   #12
dnsey is offline dnsey  United Kingdom
diyAudio Member
 
Join Date: Mar 2004
Location: Shropshire, England
Quote:
I used a 330F 16V electrolyte capacitor and a ring inductor that looks like a small toroidial transformer. Would that be fine?
You need a cap of about ten times that value (at least), and - if I understand you correctly - a much larger inductor. The secondary of an LT transformer would do for experimenting with.
Think of it this way - the frequencies that you're trying to supress are in the audio band, on a low impedence line, so you need a filter of the same order as a speaker crossover.
  Reply With Quote
Old 19th February 2006, 06:09 PM   #13
diyAudio Member
 
theAnonymous1's Avatar
 
Join Date: Feb 2004
Location: Anonymityville
I've have quite a bit of experience dealing with auto sound and I would have to guess its a ground loop issue.

If your using your cars head unit to supply the audio signal, which I assume you are, make sure the head unit and the t-amp are powered from the same wires. More importantly, make sure the t-amps -12v connection is properly connected. If not, the t-amp will pull the -12v through the RCA ground, very bad.

I've tried my t-amp in about 3 different cars without the use of a regulator and haven't had any over voltage or noise issues.
  Reply With Quote
Old 25th February 2006, 05:44 PM   #14
ractis is offline ractis  Singapore
diyAudio Member
 
Join Date: Jan 2006
Location: Singapore
I finally solved the problem by buying a $15 electronic noise filter and putting it before the power supply into the t-amp.

Thanks all for your suggestions!

PS. dnsey, I think you're right. The noise filter I bought is probably a choke/capacitor filter and it certainly feels 20x heavier than the ineffective one I built
  Reply With Quote

Reply


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
FS: Sonic Impact T-Amp oldman1 Swap Meet 2 6th December 2007 07:53 PM
Sonic Impact for MI amp mashaffer Class D 1 21st February 2007 09:25 PM
WTB - Sonic Impact T-Amp schmalex Swap Meet 4 20th January 2007 01:33 AM
Sonic Impact T-Amp Puffin Class D 11 20th March 2006 02:35 PM
bi-amping with sonic impact t amp/using sonic impact amp for headphones jon_m Class D 3 16th February 2006 11:16 AM


New To Site? Need Help?

All times are GMT. The time now is 11:46 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2