Design featuresCircuit Configuration: HI-EF Class D Hi-ef Class D fr hi-ef Class D frFrequency Response: 15 ~ 200 Hz 10 Hz ~ 25 Khz 10 Hz ~ 27 khzSignal to Noise Ratio: > 85 dB > 90 db > 90 dbInput Sensitivity: 4 V ~ 0.1 V 6 v ~ 0.2 v 6 v ~ 0.2 vCrossover Circuit:high pass crossover: 50 hz - 5 Khz (ch 1~4) 20 Hz - 5 khzhigh pass crossover : 20 ~ 200 hz (ch 5-6)24 dB / Oct 24 db / oct 24 db / octLow Pass Crossover:band pass crossover: 20 ~250 hz (ch 5~6) 50 hz ~ 5 khz20 ~ 200 Hz 50hz~5khz (ch 1-4)/20 - 200hz (ch 5~6) 50 hz ~ 5 khzSubsonic Crossover: 10 ~50 HzDamping Factor: > 300 > 250 > 250Bass Boost Frequency: 45 HzRemote Control w/clip & low volt: IncludedPower Terminal Gauge: 0 GA 4 ga 4 gaFuse Rating: 250 A 120 a 60 aDimensions: 45 x 18.5 x 5.4 cm 35 x 14.2 x 4.9 cm 23 x 14.2 x 4.9 cm17.7 x 7.3 x 2.1” 13.7 x 5.6 x 1.9” 9 x 5.6 x 1.9”Continious output power (RMS)rage 2500.1 rage 1200.6 bridge @ 4 ohm rage 600.4 bridge @ 4 ohm4 ohm 750w (Ch 1-4) 110w x 4 / (ch 5-6) 200w x 2 (Ch 1-4) 320w x 2 / (ch 5-6) 640w x 1 100w x 4 300w x 22 ohm 1500w (ch 1-4) 160w x 4 / (ch 5-6) 320w x 2 NA NA 150w x 4 NA1 ohm 2500w Na NaDescription of specifications* Speaker overload* Short circuit* Input Voltage - RCA & Power Supply3Operational voltage 9V ~16V.rage 2500.1 rage 1200.6 rage600.4