I get both 30% UNDER cost. The purpose is to drive my 2ohm ID chamelions in the front, and 2 IDQ 12"s in the back. 1. Zapco Ref 1000.4 Stereo, 4 ohms: 4 x 150 Watts Stereo, 2 ohms: 4 x 250 Watts Bridged, 4 ohms: 2 x 500 Watts T.H.D. + Noise: <0.025% @ 4 ohms S/N Ratio: >95dB Slew Rate: >32V/uS Damping Factor: >600 @ 4 ohms Dimensions: 23"L x7.5"W x 2"H 2. ARC Signature 4200 Output power : [email protected], [email protected], [email protected], [email protected], [email protected], & [email protected] bridged Damping Factor : > 1200 Frequency response: 4Hz-100Khz S/N ratio(A wtg) : > 90dB Bass boost : 0-15dB @20-80Hz Input sensitivity : .3V-4V, .6V-8V Balanced Crossover Range: 30Hz-550Hz ( x10 300Hz-5500Hz) Dimensions : 8"x 19 1/2" x 2 1/2"8 And remember, both of these are underrated

SEs because they looks sweet. everyone has the zapco refs. wouldn't a better comparison be the SEs and competition?