Opamp bypassed thanks to linuxfan's recommandations. Results are way better than with stock ones. My XLR cables are DIY pure silver single braid = can be inserted inside Opamp base easily.
The amplifier is feed with 36V batteries and 42V charger from aliexpress. You should try this instead of smps.
For less than 60 dollars, the 3eaudio is a bargain.
Anybody tried to replace some capacitors for better ones?
On its way...
In my case, having double amp config, I just take the original vol board out, bridge what needs to be to reconnect signal, and have an offboard vol pot.
You could do the same and have a vol control at the source if using only digital for example. Or replace the tiny pot inside the unit by a better one.
Many mods on their way, parts arrived, but amps aren't mine / not at my location, so needs time
Claude
In my case, having double amp config, I just take the original vol board out, bridge what needs to be to reconnect signal, and have an offboard vol pot.
You could do the same and have a vol control at the source if using only digital for example. Or replace the tiny pot inside the unit by a better one.
Many mods on their way, parts arrived, but amps aren't mine / not at my location, so needs time
Claude
I use lm4562 and the sound is clearly better.
One other thing that makes Aiyima a04 sounding slightly better is the use of a capacitance multiplier between the mean well power supply and the amplifier.
The capacitor multiplier card, made by Allo, can be bought separately from audiophonics in europe or directly from Allo. The price is about 20 dollars.
I can clearly recommend it.
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I think the sound with lm4562 is clearly better than the stock ne5532 in Aiyima a04.
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I personally find the LM833 to be better in this amp than either the OPA2134 or NE5532, but only marginally in terms of vocal clarity and sense of flow to the music. Having said that, I have the Aiyima04 TPA 3251 with green PCB and I have swapped some caps out so there would already likely be a difference in sound between mine and the original black PCB one to begin with. Will most probably try the LM4562 and maybe the OPA1656, next.
Am also eyeing the no-pop Aiyima07 TPA3255 - anybody have any thoughts on this model and how it compares SQ wise to the Aiyima TPA 3251?
Am also eyeing the no-pop Aiyima07 TPA3255 - anybody have any thoughts on this model and how it compares SQ wise to the Aiyima TPA 3251?
Hi, I own the Aiyima07 TPA3255 (last generic version) with anti pop circuit.
It does not perform as good as my Aiyima Tilear 2.1 TPA3151 with ELNA caps / OPA1656.
By the way, Aiyima has released a new version of TPA3255 (XZD-1752 PRO vs XZD-1752)
I have no idea about the caps inside....
DC32V TPA3255 280w + 280w HIFI haute puissance 2.0 canaux amplificateur de puissance audio numerique | AliExpress
If I were you : I would wait for the New 3E Audio finished TPA3255 amp
Tilear Rev 2.1
This one bro ) this is the only one that is neck and neck with my Drmordor one. (after the OPA update + inductors update)
You can also find a new version, with TPA3255 by Aiyima tag : XZD-1752 PRO (XZD-1752 is TPA3251)
But no idea about caps inside....
DC32V TPA3255 280w + 280w HIFI haute puissance 2.0 canaux amplificateur de puissance audio numerique | AliExpress
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I personally find the LM833 to be better in this amp than either the OPA2134 or NE5532, but only marginally in terms of vocal clarity and sense of flow to the music. Having said that, I have the Aiyima04 TPA 3251 with green PCB and I have swapped some caps out so there would already likely be a difference in sound between mine and the original black PCB one to begin with. Will most probably try the LM4562 and maybe the OPA1656, next.
Am also eyeing the no-pop Aiyima07 TPA3255 - anybody have any thoughts on this model and how it compares SQ wise to the Aiyima TPA 3251?
There is a thread now on audiosciencereview where Aiyima audio recommends lm4562 as an upgrade from the stock ne5532, for the amp a07.
The CMRR is 108 dB or better with lm4562.
Read more in the link below.
Which TPA3255 amp do you recommend? | Page 14 | Audio Science Review (ASR) Forum
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I sure like mine with it but haven´t tried anything else other than the original one. I might try the one daniboun recommends now and then.
Which caps did you change for what and do you find it helps any?
Interesting the manufacturer takes part in the conversation you linked to and also recommends the LM4652 (for the A07 specifically but haven´t read the whole thing). I have to say Aiyima have a nice service for sure.
I'm now thinking of getting the 3e audio 3255 finished board instead and pondering over which PSU for it. Probably a cheap Chinese switching PSU first before I get a linear one
I own several different op amps that were bought from Mouser USA, including the LM4562 & OPA1656.
After roughly a ~100 hours of burn-in on both chips, the OPA1656 is the clear winner in all categories.
Rob43
After roughly a ~100 hours of burn-in on both chips, the OPA1656 is the clear winner in all categories.
Rob43
