well i know QV is made in china now and there HQ in is india if im not mistaken since mexico QV is gone. IP has good products esp there amps. i dont think you could go wrong with either but i would say go with the amps since you get more for your buck w/ them. both quality products and you know the amps are certified since it costs lots of $$$$ to produce amps and you must get large quantity. probably doesnt really help you just my 2 cents