In my setup, I have 2 pairs of woofers and a tweeter. I have previously plugged these drivers into the Pam8610. But the problem with it was the Pam8610 has too much noise/hissing sound, I tried many ways to fix the problem but nothing changed. I decided to switch up to a fully filtered amp board. My question is between the TPA3110 and TPA3118 which one is best for my setup and can I power my setup with 8.4v battery?
I'm a newbie in this area btw.
Thanks all,
My setup detail :
x2 Tweeter: 8ohm, 20w
x2 Woofer: 4ohm, 20-30w
x2 capacitor: 100v - 3.3uf (for the tweeter)
x1 QCC3031 Module: it has its own amplifier: tpa6132a2
I'm a newbie in this area btw.
Thanks all,
My setup detail :
x2 Tweeter: 8ohm, 20w
x2 Woofer: 4ohm, 20-30w
x2 capacitor: 100v - 3.3uf (for the tweeter)
x1 QCC3031 Module: it has its own amplifier: tpa6132a2
TPA3110 is using ferrite bead whereas 3118 needs LC filter. Both their noise performance are the same.
Since you're using battery, 3110 have lower quiescent current; hence longer playback time.
Since you're using battery, 3110 have lower quiescent current; hence longer playback time.
Hello,
If you use Bluetooth module, you need an isolated dc-dc converter for it.
I have built a portable speaker with PAM8610 and it is incredibile hissless.
If you use Bluetooth module, you need an isolated dc-dc converter for it.
I have built a portable speaker with PAM8610 and it is incredibile hissless.
wait so I still need to have this even when I have two separate power sources and you mean this one right ?
Thank You
I have an extract same board like this and it still hisses a little bit even when the bluetooh module is not plugging in
I thought this already have ferrite bead on it
If you had different power supplies for Bluetooth module and for amplifier, you don't need isolated dc-dc, but don't connect GND to each other (from power supplies) .
To reduce hiss from Tpa3110, you must reduce gain from 36dB to 20dB. You can find more details in datasheet.
Have you terminate pin 3 & 4 and pin 11 & 12 together when listen to noise?
Do you have knowledge on differential input and soldering skills?
Based on the datasheet, pins 3 and 4 are LINP and LINN, while pins 11 and 12 are RINP and RINN. The hissing noise is really silenced by pairing them up. But what does this mean?
Thanks you
That means the amp is quiet and working fine.
The ground loop likely causes the hissing, to solve that you have to use the amp's differential input.
LINP and LINN are connect to ceramic cap, after the ceramic cap are it's signal and ground.
Cut out the ground traces that connect the ceramic cap and wire to the BT board's analog ground.
Hello, and thank you for your response. I'm a newbie, and I can't imagine the circuit you just described.
It would be better if you could draw a diagram for me.
Thank you very much.
I tried to wire the capacitor like this, and also like this :
With this ceramic cap :
and connect the output straight to the 3-pin audio out of the BT module.
There was no noise at all with the second method when the BT module was not connected to the amp board. The hiss becomes louder when I connect the BT module to the amp. The noise is almost inaudible with the first method of connecting the cap. and suffers from the same issue as my previous attempt.
I disconnect the RINN from its cap to test it. The hissing noise was not audible but when i connect it straight to The BT module ground the noise get louder than before. So whats wrong here?
Thank you