Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Class D Switching Power Amplifiers and Power D/A conversion

Sure Electronics AA-AB32313  2x400
Sure Electronics AA-AB32313  2x400
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 24th April 2018, 02:00 AM   #341
MirC is offline MirC  Poland
diyAudio Member
 
Join Date: Dec 2013
One picture is worth more than 1000 words
I marked gray line signal path from RCA connector up to TC2001 chip. Signal feed across resistor R8 (33k), RV2 (???) and diode D2 (smd code 5A6, look like Zener diode 5V6)- all connected parallel. Later in series by capacitor C2 and by DIP Switch (if ON) , to resistor 10k (in blue rectangular). From resistor, on input internal opamp. Resistor15k(in green rectangular) is feedback resistor for opamp.

If dip switch is OFF and we have installed caps between Vin and Vout sockets, then signal passing only by additional caps.

Resistor marked in red, 8,2k is reference resistor. According to datasheet, should be 8,25k 1%. I don't know, how critical is this element.

I bought my board directly from PartsExpress. Full symbol is: AA-AB32313V100. Maybe these good sounding boards have different revision
Attached Images
File Type: jpg AA-AB32313V100 input layout 1.jpg (371.2 KB, 281 views)

Last edited by MirC; 24th April 2018 at 02:15 AM.
  Reply With Quote
Old 26th April 2018, 07:33 AM   #342
6J7 is offline 6J7
diyAudio Member
 
Join Date: Apr 2009
Quote:
Originally Posted by ICG View Post
Did you switch the DIP-switches? SW1 has to be off.
Yes, dip-switches off.

DCR of the secondary winding may upset the board for a reason I ignore.

Same here, too much gain.
  Reply With Quote
Old 26th April 2018, 09:30 PM   #343
wancho is offline wancho
diyAudio Member
 
Join Date: May 2016
Hello All,
Just received my ab32313. I figured i was going to put the power switch at the AC mains, but now i noticed the "shutdown control connector". What is this for exactly and how does this work? Can i put a switch between these two connector pins instead of at the AC mains?
thanks in advance for your comments/help!
  Reply With Quote
Old 3rd June 2018, 08:31 PM   #344
daddy dj is offline daddy dj  United Kingdom
diyAudio Member
 
Join Date: Apr 2007
I ordered the AB32313 but received AB23251V120 Are they the same thing?
I note that on the original German "Gremlin" thread that people ordered AB32512 but received AB32313 instead.

I ordered my board from Sure on the evening of 17th May and recieved it on the morning of the 21st may pretty good all the way from China.

Like MirC I was running a TPA3116 from a 19v laptop supply, I connected up the Sure board using the same power supply. Unlike MirC I was amazed at the improvement in sound quality.
The sure board is not ideal for my speakers which are 8ohm Proac response 2.5 but it controlled them better than any other amp I have tried!

An interesting thing I discovered...I connected the pre out from my AV amp into the Sure board and ran the auto calibration routine, the set up halted and indicated that my main speakers were out of phase?
I checked all connections on the Sure board but all were correct, I reversed the speaker wires and ran the auto cal again, this time all was well...has anyone else come across this out of phase speaker issue or are the amps supposed to be out of phase at the outputs?
  Reply With Quote
Old 3rd June 2018, 08:40 PM   #345
daddy dj is offline daddy dj  United Kingdom
diyAudio Member
 
Join Date: Apr 2007
I plan on purchasing the MEAN WELL HLG-320H-36A as recommended on the German site.
What can I expect to gain from the PS upgrade? will it just be more power/volume on tap or will there be an improvement in sound quality?
I was really pushing the Sure board the other day, blasting out Leftfield's Leftism CD the clipping light came on on the heaviest bass parts but the amp still had remarkable control on those bass lines, the fan did not spin up once during the whole CD at sound levels that were extreme!

Last edited by daddy dj; 3rd June 2018 at 08:42 PM.
  Reply With Quote
Old 4th June 2018, 08:00 PM   #346
ICG is offline ICG  Germany
diyAudio Member
 
ICG's Avatar
 
Join Date: Jul 2007
Location: I had a Déjà Moo - I've seen that BS before!
Quote:
Originally Posted by daddy dj View Post
I ordered the AB32313 but received AB23251V120 Are they the same thing?
I note that on the original German "Gremlin" thread that people ordered AB32512 but received AB32313 instead.
Sure/Wondom used the same boards for both because for higher bulk numbers. They can differ in actual part specs though. Don't rely on the board type number, look at the parts (i.e. the FETs and CAPs), you might be lucky and got a actual higher specs board. Again: The board type marking may not tell the truth though.
__________________
I had a Déjà Moo - I've seen that BS before!
  Reply With Quote
Old 4th June 2018, 09:13 PM   #347
daddy dj is offline daddy dj  United Kingdom
diyAudio Member
 
Join Date: Apr 2007
Thanks for the info ICG...how would I identify these parts?
  Reply With Quote
Old 5th June 2018, 12:32 AM   #348
Cantunes is offline Cantunes  Brazil
diyAudio Member
 
Join Date: Feb 2010
Location: Rio de Janeiro
The AB23251V120 is the last version that came out.
The output coils are larger than the previous models AB32313\AB31512.
  Reply With Quote
Old 15th June 2018, 02:20 PM   #349
daddy dj is offline daddy dj  United Kingdom
diyAudio Member
 
Join Date: Apr 2007
Does anyone know what would happen if the power supply input polarity was reversed on this board?
I am still scratching my head as to why the speakers were out of phase on my board.

Speakers were wired correctly but I am not 100% sure if the polarity of the of the Power in is correct ( I dont have a multimeter to check with)
  Reply With Quote

Reply


Sure Electronics AA-AB32313  2x400Hide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sure Electronics AA-AB32281 2x200W wdecho Class D 16 3rd November 2016 10:58 AM
Sure Electronics AA-AK32151 - Assembled class D amplifier with cigar box case $25 obo JZatopa Swap Meet 2 25th June 2016 09:01 PM
Sure electronics ST508 amp: AA-AB32186 CCU Chip Amps 7 5th October 2015 09:54 AM
Sure Electronics AA-AB33182 [4 x 100W] Class D Audio Amplifier Board +27V DC Power... fualcr Swap Meet 5 11th December 2014 08:32 PM
FS: HIGH END Home Audio lot..Opera Louspeakers, Triangle Comete, AA Primo, AA, etc. JiggaD369 Swap Meet 6 22nd August 2008 01:32 AM


New To Site? Need Help?

All times are GMT. The time now is 12:23 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki