Hi!
I also noticed this ...
hot glue gun or silicone at the base ...
I have not put anything for the moment ..... because after it is less easy to replace.
I also noticed this ...
hot glue gun or silicone at the base ...
I have not put anything for the moment ..... because after it is less easy to replace.
That's why I am going to give this a try: https://www.amazon.com/gp/product/B006C4BCAK. I have bent a few caps while attempting to swap op amps last time. Granted it was due to those infernal square header pins.
I have already re-soldered OPA1692 onto the round pins, and just waiting for the above tool to arrive before I would attempt swapping op amps again.
Hi amigos,
Take a look here, the review has been moved here :
DUAL Merus MA12070 fully balanced Amplifier pictures inside
Take a look here, the review has been moved here :
DUAL Merus MA12070 fully balanced Amplifier pictures inside
🙄
Personally I do not use any potentiometer after my dac ...
Simply plugged in ... directly to the amplification card
This subject is debated and is subject to controversies ...
Personally I do not use any potentiometer after my dac ...
Simply plugged in ... directly to the amplification card
This subject is debated and is subject to controversies ...
Smart little tool! Looking closer, the pitch on the board is too big for the caps. Well, well...
Good morning all...
I begin by hoping not to speak nonsense.
Would it be possible and interesting to make the modifications that ClaudeG proposed to us on the Aiyima TPA3251 amplifier?
I begin by hoping not to speak nonsense.
Would it be possible and interesting to make the modifications that ClaudeG proposed to us on the Aiyima TPA3251 amplifier?
Denis.
Having followed Claude for many months on the updates for the Aiyima A04 amplifier was exactly the reason I started this thread but it seems to have been hijacked by many other discussions rather than the modification of the board.
Unfortunately none of these Chinese vendors publish the circuit diagram for any of their boards which makes life a little more difficult !! The Shui Yuan TPA3255 board does appear to follow the TI Eval board circuit diagram very closely if not exactly just leaving out components that are not required by this simple SE input only implementation.
That said, I think it would be very easy to make similar modifications to this board although be aware that the circuitry around the Op-Amps on the Aiyima board is quite different and includes some gain.
One area that I would like to see explored is where the Anti-Pop components appear to be missing even though it appears there is provision for these components on the board. I think there was a suggestion earlier that putting a capacitor on the mute terminal would perform this function.
This board has become very cheap to purchase now so plenty of opportunity to play and make comparisons !!
.
Having followed Claude for many months on the updates for the Aiyima A04 amplifier was exactly the reason I started this thread but it seems to have been hijacked by many other discussions rather than the modification of the board.
Unfortunately none of these Chinese vendors publish the circuit diagram for any of their boards which makes life a little more difficult !! The Shui Yuan TPA3255 board does appear to follow the TI Eval board circuit diagram very closely if not exactly just leaving out components that are not required by this simple SE input only implementation.
That said, I think it would be very easy to make similar modifications to this board although be aware that the circuitry around the Op-Amps on the Aiyima board is quite different and includes some gain.
One area that I would like to see explored is where the Anti-Pop components appear to be missing even though it appears there is provision for these components on the board. I think there was a suggestion earlier that putting a capacitor on the mute terminal would perform this function.
This board has become very cheap to purchase now so plenty of opportunity to play and make comparisons !!
.
Hi, I have added a capacitor to the mute of the PCB. It helps a lot and reduces or eliminates the slight pop at startup. On the other hand, sometimes a VERY light pop can be heard when you cut the current ... but it's already better
Good evening jean-paul!
Do not forget that these small cards do not make the advertised watts ...
I use them with a 36v power supply.
And these not the speakers who kneel ...
But the amp itself ... It goes into protection mode.
With a 1KW amp, I would not have done the same way, that's for sure! 🙂
The tool arrived and I finally swapped my Shui Yuan with OPA1692s. A few observations:
- the plier tool works decently, but a little big and a little too stiff. About worth the $3.50 I paid.
- the round pins slide in and out of sockets effortlessly. I really wish there were more warnings on the square pins. Seriously.
- I have not noticed too much sound difference between OPA1692s and the NE5532Ps that came with the Shui Yuan board. I'll listen some more.
- I have an Aiyima amp, and I swapped its NE5532Ps with LME49720NAs. I could tell the difference there and I didn't like it too much. I swapped them back.
Changing the 2 capacitors brings great improvement.
Then you will hear more improvement of the 1692
Then you will hear more improvement of the 1692
Interesting feedback.
Where did you buy the OPA1692 ? Because I heard a notable difference between the NE5532 and the 1692, with the Hanzao module it is the most obvious. I bought mine @ mouser (they are genuine).
The two big ones, the current tanks. In my case I put 50vdc 4700uf, because I use a 36vdc SMPS, this is powerful enough for my speakers which have good efficiency and listening level. I had to change to Nichicon, but I got 50vdc CDEs, they are larger than the available space. So you have to pay attention to the maximum diameter of available space.
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The fake NE5532Ps (with funny colored metal legs) I threw in the trash. On average quality speakers (those in my workshop), I did not hear any difference with the OPAs that I have.
On the other hand on my main speakers which are extremely detailed, the 3225 fake has a soundstage which lacks depth, the dynamics are somewhat truncated and the level of detail is lower.
But I recommend changing the 2 large condos first if you can.
On the other hand on my main speakers which are extremely detailed, the 3225 fake has a soundstage which lacks depth, the dynamics are somewhat truncated and the level of detail is lower.
But I recommend changing the 2 large condos first if you can.
Hi!
After receiving, my akita by DrMordor ..
In terms of feeling ...
Shui Yuan is largely in retrain ...
I think they are doing the minimum to make it work ....
At 20euros ... Do not believe in a miracle, perfect for a Bluetooth speaker or hc amp .... but not HIFI....
After receiving, my akita by DrMordor ..
In terms of feeling ...
Shui Yuan is largely in retrain ...
I think they are doing the minimum to make it work ....
At 20euros ... Do not believe in a miracle, perfect for a Bluetooth speaker or hc amp .... but not HIFI....