PHAT II active bass boost offers additional low-end power on all GSR200 models * GSR offers famous Soundgear pro comfort and playability at "entry level" prices * The GSR series includes the most affordable 5- and 6-string basses of any major brand * Phat II active bass boost adds additional low-end power to the affordable GSR200 models. * GSR200"s powerful Powersound pickups deliver full tones and strong low-end.