zx 700.5 the sub channel is rated for its power at 2ohms but im sure it'll do what u need at 4.
Power (watts/channel) 2 Ohm Stereo 85 x 4
Power (watts/channel) 4 Ohm Bridged Mono 165 x 2
Class D Power (watts) 2 Ohm Mono 420
Remote Bass Control Yes
Length (in.,cm) 20, 50.7
Height (in.,cm) 2-1/8, 5.4
Depth (in.,cm) 9-5/8, 24.4
Frequency Response 20Hz-20kHz, +0,-1dB
Input Sensitivity (High Level) 250mV-10V
Input Sensitivity (Low Level) 125mV-5V
Signal-to-Noise Ratio >95dB, a-weighted, re: rated power
Active Crossover full-range 12dB/octave, variable 50Hz-200Hz, selectable high or all pass; sub channel subsonic filter 24dB/octave fixed at 25Hz
KICKEQ Boost Variable to +18dB, centered at 40Hz, sub channel only
Differential RCA inputs eliminates unwanted system noise
Automatic Turn-On Modes +12V (Remote) - preferred method; uses the remote turn-on lead from source unit; DC Offset - detects surge from hi-level speaker outputs after source unit is turned on; Audio (Signal Sense) - detects audio signal from source unit