hi, main use for music only, no game no movie...

currently dilemma between a 2.0(HiVI D1080) or 2.1(m20w) speaker, been heard 2.0 suitable for music, but i heard that 2.0 need proper set up, unfortunely my room is too small (around 3mx7m), any suggestion? will improper set up cause the sound worst than 2.1 in term of music perfomance?

and m20w no tweeter build, it by much inferior compare to 2.0 which has built in tweeter?

hi, I got a old speaker tat by default need a 15v output from its own power supply to amp, but the power supply is too bulky and very heavy for me to bring around, any idea if i use a lighter 12v output power supply to fuel it instead?