That would be more like what the njm2114 is, that one or the njm2068 will provide a subjectively less fuzzy sound than the ne5532. These two parts are what many of the big names (Harmon/JBL, Panasonic automotive)have gone to within the last 10-20 years.
This has been discussed for The Aiyima TPA3251 amplifier. It works pretty like the FX502Spro. Usually Chinese amps have fake OP Amps I agree.
I personnaly upgraded the inductors on my TPA3251 and added some OPA1656, improvement is audible.
TPA3251d2
But keep in mind : output coils value / output caps value should be calculated for your speakers before rolling new inductors.
I personnaly upgraded the inductors on my TPA3251 and added some OPA1656, improvement is audible.
TPA3251d2
But keep in mind : output coils value / output caps value should be calculated for your speakers before rolling new inductors.
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these models are limited to 17v and the power suply of the 502SPRO is 24v.
Do these models fit to 502SPRO? if yes, do I need to change any part in the amplifier?
Definitely need to be cognizant of what you are replacing with what.
The common op amps are typically +\- 17 volts or so, is what has worked in this amp according to other users.
A simple check with a meter would have been my choice prior to considering a change.
The 24 volts is a single rail, so a comparative split rail supply would be +\- 12 volts, same delta. There may be a voltage divider to get closer to a dual supply, but I have my doubts.
The common op amps are typically +\- 17 volts or so, is what has worked in this amp according to other users.
A simple check with a meter would have been my choice prior to considering a change.
The 24 volts is a single rail, so a comparative split rail supply would be +\- 12 volts, same delta. There may be a voltage divider to get closer to a dual supply, but I have my doubts.
What a load of BS. If one 5532 made music fuzzy what would 20 do? Thats what most music has been thru.
Hi Partner11,
As @chermann (chris) mentioned, please have a look at the thread, most of the thread, deals with FX502S Pro.
TPA3250 somebody is listening?
It's already confirmed that ne5532, supplied with amp are fake.
People have already replaced & tested with
1. Geniune NE5532p or NE5532AP
2. LM4562
3. LME49720
4. OPA2134
and a few others..
All are direct replacements, nothing else need to be modified.
Other upgrades are purely optional. Upgrading Outpot coils/caps, and other caps (most are fake, not the elna as the sticker on caps says), adding heatsink & extra holes for heat release etc.
take your time and read thru the thread thoroughly, as many of owners of that specific amp, shared their ideas and results about the upgrades.
Good luck!
Yes, here are my recommendations:
1) Replace your current fake* NE5532 Op Amps with real Op Amps like the OPA1656.
2) Buy a real Meanwell 24v PSU, then adjust the voltage all the way down to roughly ~21.6v. Consider running a quality ~2200 uF 35v smoothing capacitor at the positive & negative output.
3) If you can solder, let me know. There are a few more things that can be done to increase your listening pleasure...
Rob43
* Yes, they're fake.
Rob43 said:
Be Careful ! OPA1656 do not exist in DIP8 format, you will need skills to solder it into the appropriate adapter. Or you will need extra $ to find it already mounted. But it is worth the while 😉
Nothing to be careful about, there are many sources to buy pre-built OPA1656's mounted on the needed Dip-8 adapters.
Then the end user will simply plug them in.
Rob43
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There are only some sources amigo.... You can find "ready to use" OPA1656 in DIP8 format in Europe Ebay for instance (I bought mine in Hungary). I also found them in Ebay USA. If you are talking about the adapter : I agree, easy to find but as said, need skills to solder )
Like I said & you just confirmed, there are Pre-Built sources available right now in Europe and the USA.
Rob43
Hi amigos,
I also tried 4 OPA1656 on the New TPA3255 BRZhifi.
2 are dedicated for the Tone Control
2 for the amplifier section.
They work absolutely fine with a great improvement compared to the stock 5532.
I also tried 4 OPA1656 on the New TPA3255 BRZhifi.
2 are dedicated for the Tone Control
2 for the amplifier section.
They work absolutely fine with a great improvement compared to the stock 5532.