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
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
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
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
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