TPA3255 - all about DIY, Discussion, Design etc

Jump to Latest
daniboun

daniboun

Banned
Joined 2019
bushellj said:
Hi Danny.

The ASR Review was conducted with the two power supplies that were provided to them for review. I agree, it would have been nice to see the potential performance had a better quality power supply been used as comparison with the other two.

ASR are asked to do a lot of reviews so I am sure it is difficult to test all configurations. I am also sure that we have people on DIY Audio who have the appropriate equipment to do similar reviews of these low cost amplifiers.
Click to expand...

Thanks for the answer. Happy new year by the way :)

I am in the process of getting a new SMPS LLC PSU 35V / 8.5A (300W continuous work and 600 peak) assembled with a good AC filter.
This is in order to test my updated Aiyima A04 with this great PSU vs my SMPS brick PSU 35V / 6A. I really want to be fixed and find out if a proper PSU really improves listening. I will let you know.
 
T

Toku

Member
Joined 2020
This TPA3255 amplifier is the base model of AIYMA A07, but it does not have a built-in pop noise prevention circuit.
When the power is turned on / off, a large pop noise is generated.
Recently, this model also incorporates the same pop noise prevention circuit as the A07. However, both models are on the market. Confirmation is required when purchasing.
 
daniboun

daniboun

Banned
Joined 2019
Toku said:
This TPA3255 amplifier is the base model of AIYMA A07, but it does not have a built-in pop noise prevention circuit.
When the power is turned on / off, a large pop noise is generated.
Recently, this model also incorporates the same pop noise prevention circuit as the A07. However, both models are on the market. Confirmation is required when purchasing.
Click to expand...

Wrong ! See my comments in Audiophonics... I bought it and it comes with Anti pop. ;) The Audiophonics version is safe )
I compared it to my Aiyima A04 Black pcb Tilear 2.1 with great caps, my A04 is far away better !
 
daniboun

daniboun

Banned
Joined 2019
TNT said:
OK - thanks - I think I get one for my subs (< 80 Hz, 4th order) and feed it with a 38V SMPS300RS 38V 230V SMPS Switch Mode Power Supply | Hifime Audio I have laying around.
//
Click to expand...


as said, I bought : it is a safe model but the caps are not the best.
The Connex SMPS300RS is a great PSU and has a low ripple.

If I were you I would get any top end TPA325X module instead. Drmordor or Jlester, you will really ear the difference, trust me )

Or another option if you intend to use your Sub :
This model is more versatile (PBTL/SUB mode) even if you can't updade the OP amps :


AIYIMA TPA3255D2 amplificateur 300W HIFI Mono canal Audio puissance caisson de basses amplificateur classe D ampli NE5532 OP pour son maison Audio | AliExpress


Or you also take a look at this one :

TPA3255 amplificateur de puissance HIFI Bluetooth 600W pleine frequence/subwoofer Mono amplificateur de puissance numerique Vertical haute puissance | AliExpress
 
Last edited:
TNT

TNT

Member
Joined 2003
Paid Member
Payed :)

Also got a FIIO D03K TAISHAN DAC Coaxial / Toslink 24bit / 192khz to feed the A07 wich in turn is to be hooked up to my RME Digiface - all managed by a CamillaDSP setup. Mains are also run via opto... A little bit of a trail and experiment :)

But thanks anyways.

//
 
Vunce

Vunce

Member
Joined 2014
Paid Member
daniboun said:
Thanks for the answer. Happy new year by the way :)

I am in the process of getting a new SMPS LLC PSU 35V / 8.5A (300W continuous work and 600 peak) assembled with a good AC filter.
This is in order to test my updated Aiyima A04 with this great PSU vs my SMPS brick PSU 35V / 6A. I really want to be fixed and find out if a proper PSU really improves listening. I will let you know.
Click to expand...

Hi daniboun,

Have you tried a linear psu with your TPA3255 amplifiers?
 
B

bushellj

Member
Joined 2013
Toku said:
This TPA3255 amplifier is the base model of AIYMA A07, but it does not have a built-in pop noise prevention circuit.
When the power is turned on / off, a large pop noise is generated.
Recently, this model also incorporates the same pop noise prevention circuit as the A07. However, both models are on the market. Confirmation is required when purchasing.
Click to expand...



Hi Toku If the pictures are anything to go by this is the model with the Pop Suppression (small 8 pin chip next to switch).

I have the previous (earlier) version that does not include this chip and has no Pop Suppression. That said, the Pops aren't too bad and I leave it running 24/7 so not a problem - Just don't use the front switch to turn it off !!! Turn off the Power Supply and it shuts down gently !!

Still best to check that they are actually shipping what they show in the picture !!

Personally I would still be inclined to purchase the TPA3251 version (Aiyima A04 or Tilear XZD-1752) unless you really need it to run at above 32 volts !! The Heat Sink is probably too small to run it at any higher power for any length of time !!
 
B

bushellj

Member
Joined 2013
daniboun said:
Thanks for the answer. Happy new year by the way :)

I am in the process of getting a new SMPS LLC PSU 35V / 8.5A (300W continuous work and 600 peak) assembled with a good AC filter.
This is in order to test my updated Aiyima A04 with this great PSU vs my SMPS brick PSU 35V / 6A. I really want to be fixed and find out if a proper PSU really improves listening. I will let you know.
Click to expand...



If you are planning on using a better, higher current, Power Supply my only concern is whether the existing Power Supply connector then becomes the bottleneck of getting good clean power to the rest of the PCB. Some of the PCB tracks also look quite small.

The better designs have far better Power Supply connectors and use really wide Copper Tracks on the PCB so the current can get to where it is needed.

What SMPS LLC PSU are you planning to use for your tests ? Most of the better Power Supplies already have an EMI filter built in so I did wonder if you needed another one ?

Have a great New Year and I look forward to a lot more of your reviews
 
daniboun

daniboun

Banned
Joined 2019
Hi,

I will share pictures when it is done.
I always add EMI / RFI filters on my amps and PSU, I love well done things )
When I assembled my last TPA3255 Amplifier by Drmordor, I noticed that by adding the high frequencies / RMI filter that you see on the picture, the background noise was reduced using my BT Aptx HD connection.

Concerning the Ferrite you can see, take a look at the NewClass D CookBook (page 19) :

https://www.newclassd.com/NCDCOOKBOOK300.pdf


I am also aware about the DC connector but I am not worried because I already use a 35V / 6A PSU, and I guess that a 35V / 8.5A would be supported.

Let me check and then, share )

IMG-20201204-205230.jpg
 
Last edited:
M

multisync

Member
Joined 2008
You must log in or register to reply here.
Top Bottom