I would side with the BP product as I dont have much trust in JBLs. Market is flooded with fake JBL products at such cheap prices. Also if you look at the configuration the BP has slightly more power than the JBL. Not a single negative feedback on snapdeal for this model vs 2-3 negative feedback for the JBL on the snapdeal jbl gx A644si. But before you just choose on the Amp, do also check which speaker you would be going for and would either of these models suffice for the set.