The Cowin Ark takes an interesting approach to solving the problem, ... Brad Moon covers audio gear, Apple products and consumer tech. Follow Author. Feb 18, 2016, 02:33pm EST. Share.

The WiiM Amp Ultra is capable of delivering 100 watts per channel (into 8 ohms) or 200 watts (into 4 ohms), which the brand claims is easily enough to drive up to four passive speakers. It also ...