YJ TPA3255 2.1 Finished Amp Noise Floor,Quality?

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I suspect this a is a copy by K.Guss, whoever they are in china heh. I do wonder if a genuine YJ model would have this problem. I guess the pre-amps are perhaps ones that are more noisy than ne5532?

I wonder if the tpa3255 2.1 amp with ne5532 preamp but too small cap would have better noise floor?
TPA3255 NE5532 IS1864S 2.1 300W +150W +150W Class D Bluetooth Amplifier RCA DIY-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group

 

[cacao ambiance]

Doctormord Thank you for your previous cut trace suggestions. Helped me to have courage to test and cut traces and confirm the bt module power traces which i was unsure off. as i’m not familiar with bt modules.

 

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the speaker relay, seams to have a simple few sec delay. Seams to be speaker protection from turn on pop. I wonder if pop comes from, not just power up but from bt or rca input relay switching causing a pop.

If amp turned on/off within a sec or two. the relay comes come too soon and you get speaker pop.

looking at the feedback for the ne5532 is1864s newer 2.1 amp. I see someone mentions a loud turn on pop. I see that newer version does not have a 2rd speaker protection relay. I wonder if adding a delay to input switching or amp mute on turn on would fix that problem. or disabling Bluetooth, so theres no input switching, ha! like i have done with this amp. or use external speaker protection module. got a photo of one at http://social.aross.me

 

[cacao ambiance]

I don’t remember my e3audio amps having speaker turn on/off pop problem . They don’t like single end input being dis/connected while powered up. theres a pop from speakers i think i remember... and fault protection is triggered. requiring a power on/off to rest.