I bought this little amp d okkaze for a hundred euros and not disappointed with the torque of 2 15 "usblaster an admittedly low-end configuration but for my piece zik 4m / 4 is sufficient. Fan a little noisy but 2 15 "on the front of my pear forget - the sound does not distortionne even in the beginning of" clip "for an appreciable SPL of 118 dB at 1 m from the woofers --- c is not the top but for the price c my dream is cool ---- obviously would turn to an active system "nexo" amplified by the QSC --- but I have to first feed a family ---