I changed two of mine RC4580 on my 3e four channel to OPA1656 and prefer the RC4580.
OPA1656 sounds to harsh for me and RC4580 gives 2db more bas which suits my speakers better.
So dont blame RC4580 as ****.
The TPA3255 module used therein is this:
Hifi TPA3255 Class D Power amplifier board BTL High Power amp 150W +150W L21-23 | eBay
I believe daniboun used a few of these, and was not too impressed
For the price, I will avoid it. See my Zero Zone TPA3255 review.
Get a top end TPA3251/55 with PFFB and audio grade caps by DrMordor or XRK Audio instead. This is far away better )
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Do you have a link to your review?
The amplifier I posted a link to has many features besides the TPA 3255.
Looks like many nice features for the money. I priced out the components and as built seems like a good value vs. building.
I'd like to build one but buying a finished high end TPA 3255 based amplifer seems like a great option too.
The amplifier I posted a link to has many features besides the TPA 3255.
Looks like many nice features for the money. I priced out the components and as built seems like a good value vs. building.
I'd like to build one but buying a finished high end TPA 3255 based amplifer seems like a great option too.
I have been listening to the MC33272 opamps for a few days. The difference subtle but my music now has more energy so I am very pleased. I’m going to replace caps next with some Panasonic FC 1500uf which I’m hoping will improve the bass a little bit.
Has anyone used a Focusrite Scarlett 2i2 or Solo as a balanced source? I am interested in hearing what a balanced input will sound like I just read a review of this on Audio Science Review and it seems ok for my budget.
ElliJ the big advantage of using a balanced source device with a TPA325x amp is that you can bypass the opamps. The difference is distinct, and not in the way you might imagine - the presentation is more delicate, but with more detail.
The Focusrite Scarlett seems like a bargain priced entry point to balanced DAC's, but for just a little more - US$200 - there are two highly regarded balanced DAC's; the Soncoz LA-QXD1 and the Schiit Modius. Both of these have much better measurements on Audiosciencereview than the Focusrite.
The Focusrite Scarlett seems like a bargain priced entry point to balanced DAC's, but for just a little more - US$200 - there are two highly regarded balanced DAC's; the Soncoz LA-QXD1 and the Schiit Modius. Both of these have much better measurements on Audiosciencereview than the Focusrite.
balanced inputs should be good. the amp it else has a low noise floor. i think i tested them with my Focusrite Scarlett 2i2. no problems i remember. the single end input mode it low noise too. my bigger problem is small dc around £100~ mixers have a high noise floor!
I had a look at the two DACs that were suggested, I will go with the Scarlett as it has a volume knob and it is cheaper. I will have a go at bypassing my opamps, I will desolder the pin 8‘s and then run a wires under the board from the input connectors and the + of buffer caps. I could do it with less connections but this way I can use input connectors and disturb less components on the board.
I can't speak for the "new" 3e-audio boards, but with the old board the differential inputs are definitely routed through the opamps - which is the same with the TI evaluation module, as described in the EVM datasheet -
https://www.ti.com/lit/pdf/slou441
https://www.ti.com/lit/pdf/slou441
Tricky
I didn’t know the buffer caps were surface mounts so I changed my plan. Excuse my soldering but the joints feel solid. It was a real dick to solder! I lifted the opamp pin 8. I did it this way so I could reverse everything. I just need to wait for my dac now, later today hopefully. Please don’t copy me as I am winging it and any criticism is welcome. Listening to my TPA3251 while I wait. 🤡
I didn’t know the buffer caps were surface mounts so I changed my plan. Excuse my soldering but the joints feel solid. It was a real dick to solder! I lifted the opamp pin 8. I did it this way so I could reverse everything. I just need to wait for my dac now, later today hopefully. Please don’t copy me as I am winging it and any criticism is welcome. Listening to my TPA3251 while I wait. 🤡
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That is very nice drMordor. What are the board dimensions? Can you bypass the opamps? ��
turion64 This is 110-220V (90-140 and 195-250V) version))) for you)))
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ElliJ 170x90x44H mm.
Delete OPamp and solder wires, as you.
No need for my))) But if nessary- can
Delete OPamp and solder wires, as you.