Sound quality: Monoprice's Soundstage3 Portable had Good overall sound quality - this model reproduces music and dialog reasonably well despite the obvious shortcomings in its sound. Bass has good impact and goes fairly deep, but is a bit prominent and somewhat boomy. Midrange is somewhat grainy and hazy, and a touch nasal and plasticky. Treble is fairly extended, but is somewhat smeared and a bit sizzly. Does a so-so job of recovering room ambience and sounds somewhat congested. The two channel sound field extends a bit above and not much beyond the sides of the speaker and lacks depth. Provides a decent volume level in a medium sized room but sound gets distorted at higher volume levels. No significant difference between Bluetooth, Optical, RCA and Aux sound quality.