For awhile now, I have been using (and loving) the Audioengine A5 speakers. They are a pair of self-powered monsters. There is really no other way to describe them. Big and with killer volume, the A5s are one of the best bargains out there for computer speakers… for home use.
AP4 speakers sound clean and neutral combined with the N22 amp; N22 amp has integrated headphone amp built in; Build quality is solid; Combination provides a lot of flexibility
No USB audio on USB port