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Rockford Fosgate power 851 x Manual

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SPECIFICATIONS
MODEL- Power 551X 851X
Continuous Power Rating (RMS) - Measured at 14.4 Battery Volts
4Ω Load Per Channel 70 Watts x 4 110 Watts x 4
2Ω Load Per Channel 140 Watts x 4 215 Watts x 4
4Ω Load Bridged (Mono) 275 Watts x 2 425 Watts x 2
Dimensions: (with Endbell)
Height 2.38" (6.05cm) 2.38" (6.05cm)
Width 9.85" (25.02cm) 9.85" (25.02cm)
Length 12.07" (30.66cm) 17.07" (43.36cm)
Battery Fuse Rating (Amp) 50A 60A
(External to Amplifier) Not Supplied
Fuse Type ATC AGU
Signal-to-Noise Ratio >100dB A-weighted
Crossover Slope 24dB/octave Butterworth
Crossover Frequency variable from 50Hz to 250Hz
Frequency Response 20Hz to 20kHz ±0.5dB
Bandwidth 20Hz to 200kHz ±3dB
Damping Factor @ 4Ω (at output connector ) >200
Slew Rate 30 Volts/ms
IM Distortion (IHF) <0.05%
Acceptable Signal Voltage Range Variable from 250mV to 6V (RCA)
Protection NOMAD - Internal analog-computer output protection
circuitry limits power in case of overload. Thermal
switch shuts down the amplifier in case of overheating.
Equalization (45Hz Punch Bass) Rear Variable from 0dB to +18dB @ 45Hz
Input Impedance 20k ohms
Specifications subject to change without notice
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