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Breeze TPA3255 XLR Balanced Amplifier TearDown : DIP8 Op Amps.

daniboun

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Hi amigos )

As promised, I am sharing some spec and pictures about the new Breeze Audio TPA3255 amplifier.
This is the only full balanced finished amp that I found for less than $200 )

The amp comes in an black aluminum case of modest size but seems robust however.
In the front plate you will find the RCA / XLR inputs selector with that motorized volume pot and the ON/OFF switch
I am still wondering why spending so much money on a motorized potentiometer since the amp doesn't have a remote...

The speakers banana connectors are OK and seem solid.
The XLR connectors are OK as well with a secure clip. RCA inputs are conventional
I do not observe any play on the volume knob and nothing to complain with.
You can see that the inside speaker cables and PSU to module cables are directly soldered to the PCB. (no JST connector here)

Safety is important: the amplifier is properly grounded ) Nice for a Chinese amp. )
BUT :the neutral and the phase were reversed... I corrected it )

Little mod I made :

- Update OP amps > OPA2210 (crazy op amps, give a try really !)
- Twisted the 220V cables
- Reversed the Neutral / Phase properly
- Insulated the PSU to module 36V cable
- added ferrites on the speaker cables
- added copper film to the transformer core

Listening test still in progress. But after 1 hour I can say; dead silence (even with my ears glued to the speakers) I only tested the XLR inputs with my Gustard A18 DAC.
The OPA2210 definitely worth trying! as good of the OPA1656 in term of Soundstage but with the best of the OPA1692. This super BETA Bipolar OP amps is really fast with a very low DC offset. The amplifier sounds great and very loud with the volume @ 30%. I tried to turn the volume @Max, it remains ultra silent, good point here.
For the rest, I can't say too much more, it's too early....

NB : I ve been testing many OP amps all Genuine from Mouser : OPA1622 / 1656 / 1612 / 1692 / 2210



TPA3255 MODULE :

WIMA MKS Caps (next to the volume pot) = 2U2J63 2.2uf / 63V
Electrolytic SMD Caps next to the OP amps = 220uf / 16V
Panasonic FC caps between inductors : 50V / 220uf
Switching Voltage Regulator = TI LM2575S-12
Electrolytic SMD Caps next to the Voltage regulator = 220uf / 16V
Power caps next to XLR inputs : 470uf / 50V
Polypropylene Film Capacitors : MKP10 / 0.1-250
Hongfa Relay = HFD4 / 5-S
Sagami Inductors
Volume pot : Alps Motorized Quadrirotor RK168 100K 100KAX4

PSU :

SMPS PSU 36V / 9.5A @342W
Epsilon 400uf / 400V x2
United Chemicon 1000uf / 50V x 4
Stable @ multimeter !

















 
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daniboun

daniboun

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That's what i was thinking. Then i see they have the same version with built in Bluetooth and tone controls for $59.86 Hmmm

https://www.aliexpress.com/i/4000970577819.html

edit: this one is SE not balanced, but still.


I own it ) It is absolutely not the same.... They use almost the same PSU but that s all (it is not a 9.5A inside)
PCB, caps, inputs, etc are different ) and it is not fully balanced.
It uses 4X OP amps, 2x dedicated for the Power amp and 2 for the tone control (you can bypass it BTW)
And it is less safety, not grounded...

 
OP
daniboun

daniboun

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Something is sure, this new Breeze full balanced amp is going to be a great candidate for DIY )
what makes it really interesting are the balanced XLR inputs, it makes all the difference here.

You will find thousands of TPA3255 in SE mode... it is not a scoop )
 
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Kevinfc

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Did you try a 48v power supply? Also, do you plan on switching out the caps?
 
Last edited:
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daniboun

daniboun

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Did you try a 48v power supply? Also, do you plan on switching out the caps?

I won't try it, usually TPA3255 shows the best THD+N figure @ 36 / 38V. You can change the voltage @ +- 5% with this PSU.
This 36V / 9.5A is good enough to provide a good power.

Next step will probably be :

- updating those SMD caps

This graph could be useful

 

Kevinfc

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What type of POT is installed and what would be involved in order to use a remote?
thanks
 

pseudoid

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I am having a tough time locating that specific "BRZHiFi 3255XLR" (as the front face-plate in your photo shows).
I use the BRZHiFI #PA-10 as a desktop hardware (coupled to a SXM + PC (via WXC-50) and some Dante dongles.

1642893925300.png
1642894303500.png

It was considered to be "unworthy for testing" here, but it serves my purposes well.
FOSHAN Borui Yuanda Technology Co. Ltd owns the trade mark to BRZHiFi (the original breeze sound and bright audio) and joined at the hip with WEILIANG AUDIO and Boris Audio [me thinx].
I had paid $220USD, prior to shipping (S/H) prices from China sky-rocketed!
 

ModDIY

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I can't find this amplifier on aliExpress.

@daniboun the brand is "BRZHiFi" and not "Breeze Audio".

BRZHIFI Official Store

Edit:

US $140.07 13%OFF | 2022 latest arrival TPA3255 XLR fully balanced input fully balanced output 300W*2 fever digital power amplifier 220V/110V
 
Last edited:
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daniboun

daniboun

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I can't find this amplifier on aliExpress.

@daniboun the brand is "BRZHiFi" and not "Breeze Audio".

BRZHIFI Official Store

Edit:

US $140.07 13%OFF | 2022 latest arrival TPA3255 XLR fully balanced input fully balanced output 300W*2 fever digital power amplifier 220V/110V

By BAD, you re right. Will correct ) thanks bro )
I ve been listening for one week end now. The amp sounds very good.
 
OP
daniboun

daniboun

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I am having a tough time locating that specific "BRZHiFi 3255XLR" (as the front face-plate in your photo shows).
I use the BRZHiFI #PA-10 as a desktop hardware (coupled to a SXM + PC (via WXC-50) and some Dante dongles.

View attachment 181125View attachment 181126
It was considered to be "unworthy for testing" here, but it serves my purposes well.
FOSHAN Borui Yuanda Technology Co. Ltd owns the trade mark to BRZHiFi (the original breeze sound and bright audio) and joined at the hip with WEILIANG AUDIO and Boris Audio [me thinx].
I had paid $220USD, prior to shipping (S/H) prices from China sky-rocketed!

This one is really interesting too but less powerful. It is using SK18752 @ 45W / 8R.
The volume pot is the same as the Sabaj A20A (JRC-njw1194)

Did you compare it VS any TPA325X amp ?
 

pseudoid

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Another Model# associated w/this XLR version goes under the name "Sunbuck TPA3255 XLR" << US $199.79 w/Free DHL
Caveat Emptor: BRZHiFi #PAD-X10 model appears to be the SE (RCA) version << Some versions are shown w/a FrontPanel display (@ eBay + AliExpress)
Did you compare it VS any TPA325X amp ?
English, please.:oops:
 

ModDIY

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Vini darko

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I am having a tough time locating that specific "BRZHiFi 3255XLR" (as the front face-plate in your photo shows).
I use the BRZHiFI #PA-10 as a desktop hardware (coupled to a SXM + PC (via WXC-50) and some Dante dongles.

View attachment 181125View attachment 181126
It was considered to be "unworthy for testing" here, but it serves my purposes well.
FOSHAN Borui Yuanda Technology Co. Ltd owns the trade mark to BRZHiFi (the original breeze sound and bright audio) and joined at the hip with WEILIANG AUDIO and Boris Audio [me thinx].
I had paid $220USD, prior to shipping (S/H) prices from China sky-rocketed!
Analogy in analogy out bless it's cotton socks :facepalm:
 
OP
daniboun

daniboun

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Another Model# associated w/this XLR version goes under the name "Sunbuck TPA3255 XLR" << US $199.79 w/Free DHL
Caveat Emptor: BRZHiFi #PAD-X10 model appears to be the SE (RCA) version << Some versions are shown w/a FrontPanel display (@ eBay + AliExpress)

English, please.:oops:

Have you compared it to a TPA325X for example?
 
OP
daniboun

daniboun

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Hi amigos,

I finished my mods, here MY UPDATES (all components come from Mouser / Digikey) :

- updated the OPA2210 in DIP8 (genuine from Mouser)
- changed the 4X SMD Caps Power caps 470uf / 50V > Nichicon Audio Grade UKW1H471MHD 50V / 470UF (12.5mm x 20mm)
- changed the SMD Caps next to the OP amps = 220uf / 16V >Nichicon Audio grade UCQ1C221MCL1GS 16V /220UF (8mm x 10.8mm)
- Insulated the Power cables from PSU to Module
- Add ferrites on Speakers cables
- The neutral and the phase 220V cables were reversed... I corrected it )
- Twisted the 220V AC cables
- Added a copper film around the PSU transformer

First picture = stock amp







 
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