I live in canada and the audiosource amps are just a tad (50$) pricier over here. I found what looks to be an exact clone of the amp100 from osd audio, a company that apparently makes a decent budget subwoofer. Is it a good choice to power a subwoofer or should i go for the 70 watt plate amp from solen (partsexpress canada) for 60$ + shipping