What is the purpose of R3, 368ohms ?
Wouldn't that force the volume control to be very loud ?
Where is your +5V coming from ? Perhaps adding a bypass capacitor if the source has ripple ?
A very lousy and cheap method to reduce noise on your output would be adding resistors in series with the speaker. (This also reduces volume output)
Value range: >50 ohm.
I just noticed that the AP89010 has a VOUT1 and VOUT2 that can be hooked directly to speakers.
Sorry, but if you dont mind me asking, why an amplifier is needed when the AP89010 can directly drive the speakers ?