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Class D Switching Power Amplifiers and Power D/A conversion

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Old 15th September 2018, 08:22 AM   #671
Cardone is offline Cardone
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Join Date: Aug 2018
Location: Germany
Default Photo -> LME49720NA

These are available with me
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Old 17th September 2018, 12:20 AM   #672
forestsgump is offline forestsgump
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Originally Posted by Cardone View Post
These are available with me
Thks, Cardone ~ yours & mine do look like those from RS online.
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Old Yesterday, 09:30 AM   #673
vertig is offline vertig
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Join Date: Sep 2018

I've been reading a lot of good things about Class-D amps. My current TV/audio configuration is TV box / BluRay player / PC or smartphone into the toslink / coax / usb inputs of a DAC, to a mid-2000s 35W Teac A-H300 analog amp.

The DAC (by Audiophonics) is a recent one and a solid piece of equipment. The sound from that little system is already very good.

But I was thinking replacing the amp with a Class D might bring an improvement in sound quality for not much financial outlay. The FX-Audio FX502SPRO seems among the best candidates.

My first question was how much of a step up in SQ can be expected by replacing a decently made, but by no means upscale unit such as my Teac with a Class D amp? Is it anything like a dramatic improvement or something more subtle?

My other question had to do with an opinion I've seen time and again on some other, often rather intolerant forums, that "full FDA" configurations, e.g. using an SMSL AD18 to do the job of DAC and amplification, are better than having a separate DAC and Class D amp, because the latter adds an unnecessary conversion step, D/A back to A/D, outside the digital realm, that might degrade the sound. Truth or BS?
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Old Yesterday, 12:50 PM   #674
chermann is offline chermann  Austria
diyAudio Member
Join Date: Jan 2017
Location: Vienna
Hi Vertig

the amp is actually to buy at amazon prime 66 euros.
with power supply

i do not have experiance with FDA so no comment.

the FX502Spro is a really very good sounding amp ...i compare this with old more powerful amps . if you want to mod - here in this thread you are right

i propose to read thru this thread and read about some nice informations.
mod is not necessary - first step could be changing the opamp as forestsgump and cardone.

actually i am working on tpa3255...but i promise --> if i am finishend with my planned step i will continue with FX502Spro ...


Last edited by chermann; Yesterday at 12:53 PM.
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