recommendations for a small form 2.1ch BT AMP board

guys, i'm chasing preferably a combined BT/Class D 2.1ch amp, which hs a small footprint.

if possible, one with a separate sub channel pot to adjust the output, i sort of cocked up on a small build i'm doing and would really benefit from an adjustable low pass filter\volume, my current setup has an inexpensive 2.1ch amp from Parts Express and a M28 Bluetooth chip from Banggood and i'm getting issues when the volume is up where it appears to be clipping. I'm wondering if it is linked to the DC Step down module, also having an issue with the CE65W i'm using as the 0.1ch sounding a bit average.

I tested it all using the below amp (which unfortunately is too big for this build. This amp lets you pick your low pass frequency and adjust the individual channel volume, which ended up sounding pretty good, just unfortunate i dont have the space or opening to use it now.

Zk-tb21 tpa3116d2 bluetooth 5.0 subwoofer amplifier board 50wx2+100w 2.1 channel power audio stereo bass amp Sale - Banggood.com


sorry for the longwinded question, but i would appreciate any help in finding something around that 50mmx50mm size roughly.