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

Comparing some Class D amps
Comparing some Class D amps
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 9th July 2018, 10:44 AM   #1
misago is offline misago
diyAudio Member
 
Join Date: Jun 2018
Default Comparing some Class D amps

Click the image to open in full size.

Click the image to open in full size.

Hello.

From several month ago, i have found Class D amp for me.
Finally i arrived journey's goal.

For comparison amps, bought its from Aliexpress and ebay for 3 months,
TPA3116, TDA7498, TPA3255(EVM), TAS5613, STA516B (AB32516).

First time, i bought 3116, 7498. 3116 was just bought, not use.
7498, It's not bad. but, when it's bass sound reached some area,
gave feeling stuffy. maybe it was caused by circuit design and Chinese
electronic parts on PCB.

Then i wanted new 7498 have well designed circuit. But, by seller's problem,
it had to changed to TAS5613. It was better than cheap 7498.
i had used 4 months, But, still not satisfied in detail.

I gathered more information about Class D amps form diyaudio.
Got information 3255, bought it. and same time EVM, too. haha.
During wait delivery, i saw post mentioned AB32512.
I interested, but, there were 3 models 32512, 32514, 32516.
32512'sound quality was verified many people.
then i wondered how about 32516 in new line up.

Finally, i had six amps, tested, then concluded 32516 is best in i have.
3255 was good. EVM was better than 3255 from China.
But, 3255's tone was quiet for me. Both were same.

and 32516, it was good. powerful at all range, and detailed.
In long time, i excited first time.

my speaker's output is 100W. any amps can drive it in my small room.
Compared with amps' output, it not large. it couldn't make 32516 warm.
it stayed in cold. same reason, Meanwell 600SE-48 was overpowered.
Too much fan noise, i installed fan controller, then down fan speed to lowest.
But during play music, it stayed in cold, too.

Someone interest to 32516, i recommend smaller power than expected.
  Reply With Quote
Old 9th July 2018, 01:26 PM   #2
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
Default TPa 3255 chinese board ...YJ

Hi misago

please be aware that you stress the TPA3255 with to high voltage. official all of these chinese boards are introduced with 50V but this is not ok - because the regulation chip on it is just made for 40v max.


if you are interessded in modify some boards....here in this forum it is the right place...
What is wrong with TPA3255?

chris
  Reply With Quote
Old 10th July 2018, 09:28 AM   #3
misago is offline misago
diyAudio Member
 
Join Date: Jun 2018
Thanks cherman!!

You gave me missed points for board spec.
I will try to fix it. haha
  Reply With Quote
Old 10th July 2018, 09:29 AM   #4
misago is offline misago
diyAudio Member
 
Join Date: Jun 2018
Default Thanks!!

Quote:
Originally Posted by chermann View Post
Hi misago

please be aware that you stress the TPA3255 with to high voltage. official all of these chinese boards are introduced with 50V but this is not ok - because the regulation chip on it is just made for 40v max.


if you are interessded in modify some boards....here in this forum it is the right place...
What is wrong with TPA3255?

chris


Thanks for your reply.

You gave me missed points.
I will try to fix its.
  Reply With Quote
Old 10th August 2018, 09:12 AM   #5
mixMZ is offline mixMZ  United Kingdom
diyAudio Member
 
Join Date: Oct 2013
Default AA-AB32516

Quote:
Originally Posted by misago View Post
Finally, i had six amps, tested, then concluded 32516 is best in i have.
3255 was good. EVM was better than 3255 from China.
But, 3255's tone was quiet for me. Both were same.

and 32516, it was good. powerful at all range, and detailed.
In long time, i excited first time.

Compared with amps' output, it not large. it couldn't make 32516 warm.
it stayed in cold. same reason, Meanwell 600SE-48 was overpowered.
Too much fan noise, i installed fan controller, then down fan speed to lowest.
But during play music, it stayed in cold, too.

Someone interest to 32516, i recommend smaller power than expected.
Hi misago, can you please confirm what power supply you use with this sure amplifier AA-AB32516 ?

its a bit confusing as on sure website it says:
1500W@2Ohm 96V DC THD+N 1%
and then table says again something different: min 48v, typ 60v ,max 72V
  Reply With Quote
Old 11th August 2018, 04:02 AM   #6
misago is offline misago
diyAudio Member
 
Join Date: Jun 2018
Quote:
Originally Posted by mixMZ View Post
Hi misago, can you please confirm what power supply you use with this sure amplifier AA-AB32516 ?

its a bit confusing as on sure website it says:
1500W@2Ohm 96V DC THD+N 1%
and then table says again something different: min 48v, typ 60v ,max 72V
some informations in that site are wrong.

I using Meanwell 600 SE 48V adjusted to 50V.
And Industrial power supply have fan noise, i had to use fan controller.
If you will use speaker under max 200W, i recommend same voltage,
lower output.

During power on with my system 32516, 100W (Max 200W) speakers,
power never warmed up with lower fan speed than factory setting(fixed speed) .

It means Meanwell se 48V was over spec.

You can choose small power.
  Reply With Quote
Old 17th August 2018, 05:15 AM   #7
IVX is offline IVX  Ukraine
diyAudio Member
 
IVX's Avatar
 
Join Date: Jul 2003
Location: south of China
Quote:
i recommend same voltage
if it so, why you do not recommend the max current, do you think it is doesn't matter?
Meanwell 600 SE 48V able for <12.5A, that's mean for 2 channel by 4ohm the rail voltage should drop to 12.5A*2ohm=25V. Huge capacitors tank could help a little but anyway Meanwell 600 SE 48V looks like a wrong choice for <8ohm speakers.
__________________
Let's do smth nearly impossible!
E1.
  Reply With Quote
Old 17th August 2018, 07:41 AM   #8
KaffiMann is offline KaffiMann  Norway
diyAudio Member
 
KaffiMann's Avatar
 
Join Date: Sep 2009
Location: Grua, ten minute walk from 60.258792, 10.664731
I changed to the RPS-400-48 (they can deliver 8,4A), instead of the SE-600.
  Reply With Quote
Old 17th August 2018, 08:00 AM   #9
misago is offline misago
diyAudio Member
 
Join Date: Jun 2018
Default Meanwell powers

Quote:
Originally Posted by IVX View Post
if it so, why you do not recommend the max current, do you think it is doesn't matter?
Meanwell 600 SE 48V able for <12.5A, that's mean for 2 channel by 4ohm the rail voltage should drop to 12.5A*2ohm=25V. Huge capacitors tank could help a little but anyway Meanwell 600 SE 48V looks like a wrong choice for <8ohm speakers.
I'm using 8ohm 100W speakers.
Meanwell 600 SE 48V is too much overpowered for these speakers.

Max current is not important.
If you can play music, with 500 watt speakers, max volume,
you have to use more powerful power supply.
but most of all are play as 30~50% volume as max by environment.
  Reply With Quote
Old 17th August 2018, 08:15 AM   #10
IVX is offline IVX  Ukraine
diyAudio Member
 
IVX's Avatar
 
Join Date: Jul 2003
Location: south of China
If the current isn't important, why we talking about a power? Let's call output voltage instead of power If 48V 100mA will be ok, it's gonna look like iPhone charger, cute!
__________________
Let's do smth nearly impossible!
E1.
  Reply With Quote

Reply


Comparing some Class D ampsHide 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
Combining and Comparing Class T OpterN Class D 0 3rd March 2014 11:46 PM
Comparing Class D to my Yamaha Natural Sound Receiver hoffsta Class D 6 14th December 2011 08:59 AM
For Sale: Tube Amps, Class-A Amps, BG Ribbons, Chassis and Other Goodies! opc Swap Meet 23 2nd November 2009 06:04 PM
How about a round-up of Class A kit power amps, or collectable vintage class A? Brisso57 Solid State 4 14th February 2007 11:30 AM


New To Site? Need Help?

All times are GMT. The time now is 04:47 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki