Guy, last night I was talking to Barry of JL Audio...it took us about an hour conversing about dual Gotham VS Quad f113...according to him it is practically the same, mas maganda lang tignan Gotham, statement kung baga...The beauty having 4-8 f113 is that you can use an EQ designed by him...or if you stack the f113 you can calibrate each sub according to each position...one good point that he mentioned is that if you are watching a movie that does not need allot of bass you can turn off the other subs compared to the Gothams naka pako ka na sa 4 woofers agad once you turn it on....