O-Noorus D1 [TPA3255 PFFB] Stereo Amplifier - User Impressions | Owner's Thread

[Zek]

Mon ami m'a refiler son amplificateur non fonctionnel j'ai débourser $$ pour le faire réparer et maintenant il fonctionne.
cependant mon technicien affirme que l'implantation des pièces est très mal faite certaines sont soudées croche sur le circuit imprimé aucune protection sur la connexion souder etc...
les coils chauffés...
UNucune pâte thermique pour le dissipateur relié à la puce ti 3255...
Donc, il ne m'offre aucune garantie que d'autres soucis ne surviendront pas à court terme.
les fils s'écrasent sur le tableau et sont à risque.
Donc, faite inspecter votre ampli à sont arriver.

Google Translate:
My friend gave me his non-functional amplifier. I paid $$ to have it repaired and now it works.However, my technician claims that the installation of the parts is very poorly done, some are soldered crookedly on the printed circuit, no protection on the solder connection, etc.the heated coils...No thermal paste for the heatsink connected to the ti 3255 chip...So, it doesn't offer me any guarantee that other problems won't arise in the short term.the wires crash into the board and are at risk.So, have your amp inspected when it arrives.

 

[Audiovue]

@Audiovue Please write in english.

Just translate

 

[Tell]

Just translate

It's an english forum, so write in english.

 

[Jimbob54]

This is an English language forum so we request members do post in English.

 

[Audiovue]

It's an english forum, so write in english.

Stop insulting me. Grrrrrr

 

[Jimbob54]

Stop insulting me. Grrrrrr

That is not an insult. It's a statement of fact along with a reiteration of advice previously given.

 

[UAN]

I replaced the NE5532 op amp with an LM4562 and now the amplifier sounds much better. I compared it with PA5 II and didn’t notice a difference.
Very good.

 

[dr_mick51]

I replaced the NE5532 op amp with an LM4562 and now the amplifier sounds much better. I compared it with PA5 II and didn’t notice a difference.
Very good.

I use 2x OPA1612 opamps I soldered to DIP8 adapters. Of course the amplifier sounds amazing.
I also replaced the thermal paste(between chip and heatsink) with a better one just for peace of mind. The amp gets slighly warm at 97-98°F after a while.
I really like the digital volume control and the remote controller. I have a couple of vintage DACs with no volume control, so it is super useful for me.

 

[FanatNsk]

I replaced the NE5532 op amp with an LM4562 and now the amplifier sounds much better. I compared it with PA5 II and didn’t notice a difference.
Very good.

I have a question about the input sensitivity of the rca input. What is the voltage threshold before overload begins? What will happen to the output signal if I apply a 2Vrms sine wave to the amplifier input, will there be distortion on the multi-tone signal?