ChipAmp Reviews? - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 29th July 2012, 03:55 PM   #1
diyAudio Member
 
Join Date: Aug 2004
Location: Argentina
Default ChipAmp Reviews?

Hey guys, someone know some page where can see reviews about DIY ChipAmps ? i already build 2 amps (LM3886, LM4870), and want to build other ones, the main problem is to figure wich to build, will be great if someone know some url where ppl review some of these amps!.
  Reply With Quote
Old 29th July 2012, 04:00 PM   #2
diyAudio Member
 
Join Date: Mar 2007
Location: California
I don't think that there is such a web site.

You might start a comparison by printing out all the datasheets and looking at the specs for the amp in terms of power, distortion, and how distortion changes with frequency and power level. This is one big difference between chip amps, for instance. Also, check the THD level above 1k Hz (look for plots) as this is where distortion rises with frequency.

There are other subtleties too, like what kind of devices are used for the power stage of the chip amp. I recall reading some posts to this effect that were comparing the TDA7293 & TDA7294 chip amps to the LM3886 and LM4870.

-Charlie
  Reply With Quote
Old 30th July 2012, 08:56 AM   #3
bcmbob is offline bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
I would ask what your goal/need is? Are you looking for a specific sound quality or mostly interested in trying a new technology/chip design. Both are completely valid but it would be helpful to know if you have a priority.
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 30th July 2012, 02:19 PM   #4
diyAudio Member
 
Join Date: Aug 2004
Location: Argentina
thanks for your support, mainly i want to build some cheap 2 channels amps. IM trying the build an good cost/performance amp
  Reply With Quote
Old 30th July 2012, 04:28 PM   #5
bcmbob is offline bcmbob  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Bay City, Michigan
From your post I'm not sure if you want to try a different chip, but the BrianGT amps are my favorite low cost kit. They hold their own against the more sophisticated designs like the MyRef series.

Have you looked at the XY thread? They may be a little cheaper but are very similar to the ChipAmp.com amps.

LM3886 chips are all I have tried so others will make their own suggestions on alternatives.
__________________
Bob M.
"Arrange Whatever Pieces Come Your Way."
  Reply With Quote
Old 30th July 2012, 04:50 PM   #6
Jay is offline Jay  Indonesia
diyAudio Member
 
Join Date: Feb 2003
Location: Jakarta
I like TDA2009. It can put out around 3W or 4W at 0.1% THD (higher wattage gives higher THD). It is the best I have seen for small power chip amp. Low power means it is not expensive to build a beefy power supply (capacitance multiplier).

Some higher power chip amps can give comparable THD specification. But wait, check the topology first. Most of them are the boring quasi output stage. The TDA2009 also uses quasi output, but with unique topology (a better one). And look at the feedback topology or the input singleton:
Attached Images
File Type: png TDA2009Quasi.PNG (16.7 KB, 204 views)
  Reply With Quote
Old 30th July 2012, 05:18 PM   #7
diyAudio Member
 
Join Date: Aug 2004
Location: Argentina
thanks guys. the TDA 2009 looks ok for 4-5W small PC speakers. more than 5watts give too much THD. Some small IC like TD2009 but that give at least 10watts< 1%THD? of course using 8ohms speakers.
  Reply With Quote
Old 30th July 2012, 05:24 PM   #8
diyAudio Member
 
Join Date: Aug 2004
Location: Argentina
Quote:
Originally Posted by bcmbob View Post
From your post I'm not sure if you want to try a different chip, but the BrianGT amps are my favorite low cost kit. They hold their own against the more sophisticated designs like the MyRef series.

Have you looked at the XY thread? They may be a little cheaper but are very similar to the ChipAmp.com amps.

LM3886 chips are all I have tried so others will make their own suggestions on alternatives.
reading xy now
  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
Music Reviews Bonsai Music 2 12th March 2012 09:25 AM
ZA5.5 reviews? plmedeiros Multi-Way 4 3rd December 2010 09:13 PM
Readers Reviews. brianco Everything Else 0 31st December 2007 05:05 PM
Aleph Reviews macka Pass Labs 4 22nd January 2003 09:21 AM
Where do you get your music reviews... Sawzall Everything Else 9 26th May 2002 03:55 AM


New To Site? Need Help?

All times are GMT. The time now is 12:43 AM.


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