Sonic Impact PSU current - Page 4 - 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 2nd July 2005, 08:40 PM   #31
el`Ol is offline el`Ol  Germany
diyAudio Member
 
Join Date: May 2005
Location: Bavarian Forest
Quote:
Originally posted by !
IMO, better to just get a larger supply.

My supply has 6A max. current. I`m going to test a Panasonic Class D amp, which has the Texas Instruments chips derived from the TaCT Millenium. It uses the rail voltage for volume control, i.e. it is fully-driven at any level and may not need the compression.
  Reply With Quote
Old 2nd July 2005, 11:27 PM   #32
! is offline !  United States
diyAudio Member
 
Join Date: Jun 2005
Location: Midwest
Quote:
Originally posted by el`Ol



My supply has 6A max. current. I`m going to test a Panasonic Class D amp, which has the Texas Instruments chips derived from the TaCT Millenium. It uses the rail voltage for volume control, i.e. it is fully-driven at any level and may not need the compression.
Your results are inconsistent with anyone elses if the supply is adequate. 6A max current is sustained or instantaneous? Something seems odd about your arrangement to the extent that it is an isolated problem not seen by others.

Let me put it another way- Tripath guarantees minimal, very low distortion for at least ~4W though 4 ohm load. To get 4W output, it is manditory that the input power be higher than 100mA. With this in mind it would seem the remaining factor (unless Tripath is blatantly lying) is either your supply, the SI circuit departures from reference, or any mods you made to it (or of course the speakers).
  Reply With Quote
Old 3rd July 2005, 04:35 AM   #33
el`Ol is offline el`Ol  Germany
diyAudio Member
 
Join Date: May 2005
Location: Bavarian Forest
I wouldn`t call it a problem. It`s just that the T-Amp reproduces timbres better than my old valve (push-pull) but has worse timing. And I will have to decide whether to use a Class D amp or build a single-ended valve amp.
  Reply With Quote
Old 12th July 2005, 03:56 PM   #34
el`Ol is offline el`Ol  Germany
diyAudio Member
 
Join Date: May 2005
Location: Bavarian Forest
I just got an analog constant voltage power supply of the same brand and everything is running perfect. There was one piece of Bach where the T-Amp went totally out of time before, and even here - everything perfect. Probably the inernal voltage regulation of the T-Amp formed an oscillator together with the voltage regulation of my power supply, which interfered with the timing. I apologize for having made so much fuzz, but there is one thing we can learn: stay away from variable voltage supplies.

Greets and lots of fun with your T-Amps,

Oliver
  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
Sonic Impact T-amp UNPIGLET345 Chip Amps 2 10th July 2008 10:52 PM
Sonic Impact bi-amp help Commited Class D 24 27th January 2007 11:46 AM
Op-Amp Pre for Sonic Impact? Buckapound Class D 11 21st August 2006 09:42 PM
bi-amping with sonic impact t amp/using sonic impact amp for headphones jon_m Class D 3 16th February 2006 10:16 AM
Sonic Impact spots25 Class D 19 6th April 2005 11:16 AM


New To Site? Need Help?

All times are GMT. The time now is 05:31 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