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Class D Switching Power Amplifiers and Power D/A conversion

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Old 23rd July 2012, 10:30 PM   #51
danzz is offline danzz  Spain
diyAudio Member
Join Date: Mar 2012
Originally Posted by Rusbelio View Post
I have question to choose one Tripath amplifier at Ebay.

I want a good amplifier with good sound for a cheap price (between 0-45$ ). I saw some amplifiers like Lepai TA2020+, Indeed Tripath TA2020, S.M.S.L SA-36A TA2020, etc.

I have repaired two speakers with 3 way system (Woofer, mid and tweeter with 8 ohm impedance) with 50W RMS for each speaker.

Could yo help me to choose a good amplifier? I have a Kinter MA-180 but isn't good enough right now, it has 10W RMS for each channel, a poor output power.

For those 50rms speakers I would recomend the LM3886 amp.
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Old 4th October 2012, 09:36 PM   #52
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Thanks for this usefull topic.
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Old 1st June 2013, 04:51 PM   #53
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Join Date: Jun 2013
Default Class T Amplifier Database & Form

Hello all. I've created a Google Form and spreadsheet for Class T amplifiers.

I'd value your feedback on improving the form and help populating the spreadsheet.

The spreadsheet currently lists amps listed in the old wiki FAQ that I found are still available. I'm new to this arena, so I'm sure there are glaring omissions.

The form is here:

And the spreadsheet:

Thank you,

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Old 4th July 2013, 04:05 AM   #54
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Join Date: Jan 2012
Location: losari indonesia
I currently need a power scheme TD class.
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Old 4th July 2013, 04:09 AM   #55
diyAudio Member
Join Date: Jan 2012
Location: losari indonesia
class is amazing,,,,,,, success always for you
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Old 6th January 2014, 10:13 AM   #56
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Join Date: Jan 2014

I have build a small multi room audio system with a Linux box and five lepai amp for smaller rooms (restroom, kitchen,..).
To turn on a zone I only power up the amp with a relay on the power cord. This works great with two version 2 amps.
But the other three version 3 amps produce a loud turn-off pop… How to eliminate this? How does the speaker protection work?
For me it seems that the relays does not disconnect fast enough. Or do i have to fix / measure the dc offset on pin 10 & 13?

Any help or advice would be greatly appreciated. Thanks.
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Old 8th July 2014, 05:55 PM   #57
eduard is offline eduard  Netherlands
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Join Date: Sep 2002
Location: Holland
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Default virtue sensation modification.

I just did buy a secondhand virtue sensation with a gary dodd tube buffer.
I am allready using one but i did want another one to use in my bigger set as a power amp with 12 db filter at its input to use it up to 600 hertz.
I will use a battery power supply.
One of the line level inputs will become the power amp input ( by turning the volume all the way up.
There is a switch inside between a full range and 80 hertz and up cap. Because i use a subwoofer i will; use the smaller cap.
Normally there are 3 sets of input which have a little coil just before the signal goes inside the circuit by means of a small connect, same for pre amp out and subwoofer out. Can i just diconnect the jumpers from the circuit board and leave them '' open" ?
Or do i have to collect all the cinch ins and ouits with a shortening plug and rerout them inside. I need some space on the back panel to mount the 12 db filter ( coil, cap and pot)
Also need to replace the power plug with a speak on and install a bigger switch too.
I did ask this on the audio circle site but no responses because there isnt much of a diy crowd.
Sincere greetings and many thanks in advance, Edward
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Old 6th December 2016, 11:19 AM   #58
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Join Date: Aug 2016
Location: Athens
I think it's better to post this here. I' m building a guitar amp for my 10 years old nephiew and for simplicity I would like to use a tripath module for the power output section. The problem is that it is a stereo amp and AFAIK outputs cannot be bridged for mono operation. So, I have to use two speakers but the construction gets too big. Another option would be to load one channel with a power resistor and leave it unused. But I was reading that class D amps don't clip in the usuall way when overload - true? - and I thought to connect the output of one channel to the input of the other channel - channels in series - and see what it does. My question is if this could be done without the risk of an internal shortcircuit or a catastrophic oscillation.
Thanks for any advise.
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Old 6th December 2016, 04:17 PM   #59
schdrag is offline schdrag  Switzerland
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Join Date: Nov 2014
I would go for a mono TI module tpa3116 or tpa3118, which can used along with a 19V netbook power supply.
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Old 6th December 2016, 04:41 PM   #60
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Location: Athens
I'll check this. Thanks!
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