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Class D Switching Power Amplifiers and Power D/A conversion

Cheap class D: Topping MX3 vs Alientek D8 vs I.AM.D V200
Cheap class D: Topping MX3 vs Alientek D8 vs I.AM.D V200
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Old 21st October 2019, 01:31 AM   #11
linuxfan is offline linuxfan  Australia
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Quote:
Originally Posted by sajunky View Post
My D30 ($130) play dominant tones well, but not music.
The initial presentation is positive, but it is fatiguing after 20 minutes.
It's good to hear a well-explained review such as this. Thanks.
Yes, good measurements don't automatically mean good sound. To be fair to the Topping NX4 DSD, though, it uses different DAC technology to the D30.
sajunky, I would love to hear your impressions of the Khadas Tone Board - I'm considering buying this for my second system.

Quote:
Originally Posted by sajunky View Post
I suggest cheap $42 DAC that works better for me than D30 and it also has a decent HPA
Nobsound Mini HiFi Sound Card DAC TDA1387
Again, it's good to hear real-world impressions from people who listen to these products.

Regarding the FX-502SPRO, yes this is a slight step up from TDA7498 amps (I have compared these, myself)
but then again, there's a newer Chinese TPA325x amp available - the AIYIMA TPA3251
AIYIMA TPA3251 Digital Audio Amplifier HIFI Power Amplifier 2.0 Home Mini Professional Amp NE5532 175W *2 Super TDA7498E/TPA3116-in Amplifier from Consumer Electronics on AliExpress - 11.11_Double 11_Singles' Day

TrueFaith, this brainstorming has yielded some very good bang-for-buck hifi suggestions. It appears the best value DAC/amp may be:
Nobsound TDA1387 + FX-502SPRO (or AIYIMA TPA3251)
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Old 22nd October 2019, 04:06 AM   #12
forestsgump is offline forestsgump
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Originally Posted by forestsgump View Post
Bought Fx520Spro earlier, but using Alientek D8, dint cared about using BT, as lossy compression.

D8's USB & Optical is quiet, exceptionally low jitter processor.
Loved it was not just Class-D, as FDA is unadulterated SQ & D8 is Open loop. Feeding with chromecast audio optical & also USB DSD with Xmos processor! Though analog inputs are hissing. Nice solution, amazing SQ.

Fx520Spro SQ slightly brighter lively, opamp could be better. Non friendly as it lack digital inputs, would complicate my audio solution, now as a backup amp in storage. took a look at Sabaj's usb - for me usb-micro-connector is a concern, Sabaj A3 having similar FDA as D8.
Yep, Fx520Spro SQ would be my favorite, if not for lacking spdif Optical & Xmos USB DSD, which complicates my audio solution
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Old 18th November 2019, 10:31 AM   #13
nickytheshaft is offline nickytheshaft  France
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Location: lyon
I have a D8, it is a FDA so you don't need a DAC. You have to feed it a digital source.
The RCA inputs on this amp shouldn't be there, they convert the analog sound to digital then back th analog at the binding posts.
The RCA sound is crappy as hell as the digital inputs can do wonders (if you use USB make sure to install the xmos drivers)
One thing that should be noted (it is badly explained), you have to set the eq management to TONE. Strangely TONE is the most neutral, direct has an eq setting... Anything set apart of tone badly colors the sound.
Fot the price you can't go wrong. I have an SMSL A8, it is of course a little better but 5 times the price. I also have a 300B valve amp, a NAD 325 and the D8 is really a good competitor if you respect the little rules to use it (Ditch the RCA, use Digital input only, xmos drivers and set to TONE)

Last edited by nickytheshaft; 18th November 2019 at 10:37 AM.
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Old 19th November 2019, 09:00 AM   #14
KaffiMann is offline KaffiMann  Norway
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Cheap class D: Topping MX3 vs Alientek D8 vs I.AM.D V200
Quote:
Originally Posted by linuxfan View Post
Regarding the FX-502SPRO, yes this is a slight step up from TDA7498 amps (I have compared these, myself)
but then again, there's a newer Chinese TPA325x amp available - the AIYIMA TPA3251
AIYIMA TPA3251 Digital Audio Amplifier HIFI Power Amplifier 2.0 Home Mini Professional Amp NE5532 175W *2 Super TDA7498E/TPA3116-in Amplifier from Consumer Electronics on AliExpress - 11.11_Double 11_Singles' Day

TrueFaith, this brainstorming has yielded some very good bang-for-buck hifi suggestions. It appears the best value DAC/amp may be:
Nobsound TDA1387 + FX-502SPRO (or AIYIMA TPA3251)
That is very good advice, I'm a fan of the TPA32xx family myself. A lot of value for money.
The Tilear xzd-1752 is new to me, but probably just as good or better than the FX 502.
Perhaps a good power supply would be something like this 32V 6A
Yuan Jing Audio - ON SALE! - AC DC Adapter [Universal Switching Mode Power Supply SMPS] [ 32V / 6A ] - USD $26.50 - AC DC Adapter - Switching Mode

I will order a couple of these amps to try.
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Old 29th November 2019, 09:12 AM   #15
oxoxbyx is offline oxoxbyx
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how about I.AM.D V200 ? i ever read review in somewhere in here that pretty good sound, hows it compare to Sabaj A4, it seems both of them use texas instrument chip, is that sonic different when some chip amp labeling with PurePath technology ? or just marketing label?
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