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Class D Switching Power Amplifiers and Power D/A conversion

what D amp give best sound.
what D amp give best sound.
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Old 26th October 2016, 09:31 AM   #11
Grizlek is offline Grizlek
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Lets compare sound quality of free UCD design (feedback after inductor, R paralell to RC as feedback) vs IRS2092 (feedback after output transistors).
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Old 26th October 2016, 11:40 AM   #12
jahshines is offline jahshines  United States
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Can anyone explain to me why the Sure AA-AB32313 would sound better with a lower than spec power supply?
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Old 26th October 2016, 11:42 AM   #13
jahshines is offline jahshines  United States
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If anyone owns this amp, what supply are you using?
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Old 26th October 2016, 11:57 AM   #14
doctormord is offline doctormord  Germany
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Quote:
Originally Posted by jahshines View Post
Can anyone explain to me why the Sure AA-AB32313 would sound better with a lower than spec power supply?
Just guessing - it may be due to lower quiescent current and residual noise which will dominate at low output volume -> silent passages.

Never tested that.
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Old 26th October 2016, 12:34 PM   #15
jencelo is offline jencelo  United States
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Go with TPA TI amps. I think they sound wonderful! They are dirt cheap too. Nothing to lose here. I cannot wait to have the new TPA3255 which is little bit more expensive but not much.
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Old 9th November 2016, 03:48 PM   #16
GiAnt1961 is offline GiAnt1961  Italy
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Quote:
Originally Posted by xrk971 View Post
... Other ones to try are TDA7498, and IRS2092 circa 200W. I have all of these and the IRS has the lowest distortion but a hassle as it needs dual rail supply. If you are looking for something to power your Trynergy all you need is a TPA3118 PBTL to start things off. Get a $20 IRS2092 if you want to run the whole thing passively and drive a 3 way. If active try amp then qnty 3 of the TDA7498 will work nicely. Need some 24v 3A SMPS bricks to go with it.
Among the TDA7498-based boards, might this one https://it.aliexpress.com/item/TDA74...1-b4b52c4208e6 be recommended?

If yes, what power supply might be paired (how many Amperes)? In your opinion are further boards required (e.g. protection loudspeaker, soft start)?
many thanks
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Old 9th November 2016, 05:16 PM   #17
mhouston is offline mhouston  Australia
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Personally I can recommend the old and the new EAT hifimediy T4 - 150W modules with speaker crowbar protection. The new ones, V1.3 may not be as warm as the original T4 but still very good. I have made and sold six T4s and are currently building a pair of T3 monoblocks with 44,000uf of Mundorf MLytic ultra low ESR filter caps.

I are also are using as my current amp a Digikey 250W IRS2092 based amp again with the high current 47,000uf Mundorf MLytic caps (two for a differential PS). Also I have built and sold amps with the Sure 100W modules and 500W module. Both OK but not as good as the T4s.
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Old 9th November 2016, 11:20 PM   #18
abraxalito is offline abraxalito  United Kingdom
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Quote:
Originally Posted by mhouston View Post
I are also are using as my current amp a Digikey 250W IRS2092 based amp again with the high current 47,000uf Mundorf MLytic caps (two for a differential PS). Also I have built and sold amps with the Sure 100W modules and 500W module. Both OK but not as good as the T4s.
To get the best sound out of my IRS2092 amps I found the chip's power supplies do need to be low impedance. The internal zeners have too high a dynamic impedance, external decoupling is called for - at least 470uF low ESR caps.
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Old 10th November 2016, 01:39 PM   #19
GiAnt1961 is offline GiAnt1961  Italy
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Quote:
Originally Posted by xrk971 View Post
If active try amp then qnty 3 of the TDA7498 will work nicely. Need some 24v 3A SMPS bricks to go with it.
Therefore this https://it.aliexpress.com/item/TDA74...2-a70ccd30c66a could be a good choice for my active system. Any suggestion for the power supply?
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Old 10th November 2016, 01:48 PM   #20
GiAnt1961 is offline GiAnt1961  Italy
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Quote:
Originally Posted by mhouston View Post
Personally I can recommend the old and the new EAT hifimediy T4 - 150W modules with speaker crowbar protection. The new ones, V1.3 may not be as warm as the original T4 but still very good. I have made and sold six T4s and are currently building a pair of T3 monoblocks with 44,000uf of Mundorf MLytic ultra low ESR filter caps.

I are also are using as my current amp a Digikey 250W IRS2092 based amp again with the high current 47,000uf Mundorf MLytic caps (two for a differential PS). Also I have built and sold amps with the Sure 100W modules and 500W module. Both OK but not as good as the T4s.
T3 and T4 are out of stock. Anyway for my active system I need at least 6 amps and 86 Euro x6 plus power supplies is not cheap. Finally the power is excessive for both tweeters and midrange. For this reason I continue to prefer the advice of X
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