About: JL Audio HD1200/1 HD Series 1200W RMS Monoblock Amplifier 

Our most powerful HD amplifier employs our advanced Single-Cycle Control switching design and R.I.P.S. technology to deliver 1200 W of clean power into any impedance between 1.5 and 4 Ω, giving you the highest degree of flexibility in designing your subwoofer system. Tight power supply regulation keeps distortion down and maximizes your bass quality. From a pure sound quality perspective, we invite you to compare the real-world, in-car performance of this amplifier to any other amplifier on the market, of any type, at any price.

While targeted primarily to subwoofer applications, the HD1200/1 is a wide-range amplifier and can also be used to drive high-performance mid-range speaker systems. This amplifier features a brushed aluminum finish with black powder-coated cast alloy heat sinks and bottom panel. A black powder-coated, gasketed cover is also provided to protect the controls. 

Features:  

• Mono subwoofer amplifier
• 1,200 watts RMS x 1 (rated power from 1.5 to 4 ohms)
• Variable high- and low-pass filter (50-500 Hz 12 or 24dB/octave)
• Switchable subsonic filter (30 Hz) and output polarity control
• Removable power and speaker plugs
• Optional wired remote for level control
• Optional HD stacking kit for stacking multiple HD amps together
• Single Cycle Control Class D amplifier design
• Regulated, Intelligent Power Supply System (RIPS) ensures consistent power output over a wide range of battery voltages and load impedances
• Differential-balanced inputs eliminate noise from your vehicle's electrical system
• Speaker- and preamp-level inputs (speaker-level input requires an optional adapter)
• Preamp outputs
• Dimensions (W x H x D): 10.74" x 1.93" x 7.85" (273 x 49 x 199 mm) 
• Weight: 6.6 lb (2.99 kg) 

Specifications:

• Rated Continuous (RMS) Power @ 14.4 V: 
• @ 4 Ω 1200 W RMS x 1
• @ 3 Ω 1200 W RMS x 1
• @ 2 Ω 1200 W RMS x 1
• @ 1.5 Ω 1200 W RMS x 1
• Rated Continuous (RMS) Power @ 12.5 V: 
• @ 4 Ω 1200 W RMS x 1
• @ 3 Ω 1200 W RMS x 1
• @ 2 Ω 1200 W RMS x 1
• @ 1.5 Ω 1200 W RMS x 1
• Frequency Response: 6 Hz - 8 kHz (+0, -1dB)
• S/N Ratio, referred to highest rated power: >110 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth)
• S/N Ratio, referred to 1 W (Main Channels): >79 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth)
• Damping Factor @ 4 Ω: >500 / 50 Hz
• Damping Factor @ 2 Ω: >250 / 50 Hz
• THD+N @ Rated Power (Main Channels): <0.03% @ 4 Ω
• Input Voltage Range @ RCA Inputs: Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High)
• Min.Copper Power / Ground Wire Gauge: 2 AWG wire
• Fuse Rating: 100 A (AFS, AGU or MaxiFuse™)

Signal Processing: 

• Filter Mode(s): Low-Pass or High-Pass
• Filter Slope(s): 12/24 dB/octave
• Filter Frequency Range: 50 Hz - 500 Hz
• Detented, Calibrated Filter Freq. Potentiometer: Yes
• Filter Defeat Function: Yes
• Infrasonic Filter: 30 Hz, defeatable
• Bass Boost EQ: No
• Output Polarity Switch: Yes
• Remote Subwoofer Level Control: Optional (HD-RLC)
• Remote Bass EQ Boost Control: No
• Pass-Through Preamp Output: Buffered

What's in the Box: 

• Monoblock Class-D amplifier
• Self-adhesive JL Audio badge
• Power connector plug
• Speaker connector plug
• 4 Mounting feet
• 4 Bolts for mounting feet (M4 x 40mm)
• 4mm Allen wrench
• 2.5mm Allen wrench
• Owner's Manual
• Power wire note