Name: JL Audio HD1200/1
Brand: JL Audio
SKU: hd12001
Price: 1549.99 USD
Availability: InStock
Rating: 4.9091 (11 reviews)

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Product highlights

• 1200 watts x 1 channel @ 4 ohm
• 1200 watts x 1 channel @ 2 ohm
• Total RMS Power: 1200 watts
• Class D 1.5 ohm Stable Monoblock Amplifier

Learn more about the hd12001

Universal – fits most vehicles.

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$1549.99

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Product Highlights

• 1200 watts x 1 channel @ 4 ohm
• 1200 watts x 1 channel @ 2 ohm
• Total RMS Power: 1200 watts
• Class D 1.5 ohm Stable Monoblock Amplifier

Description

Authorized dealer

Monoblock Class D Subwoofer Amplifier

The JL Audio HD1200/1 is the most powerful monoblock amplifier in the flagship HD series, designed to deliver massive, competition-grade power from a chassis roughly the size of a sheet of computer paper. It utilizes JL Audio’s advanced Single-Cycle Control and R.I.P.S. (Real-Time Intelligent Power Supply) to provide 1200W of clean, consistent power to your subwoofers, regardless of vehicle voltage fluctuations or load impedance.

The HD1200/1 is a "wide-range" monoblock, meaning that while it is primarily used for subwoofers, it has the fidelity and frequency response to drive high-performance mid-range speaker systems if needed. Its R.I.P.S. technology is a standout feature, ensuring that you get the full 1200W of power whether you are running a 1.5 ohm or 4 ohm load.

Product Details:

HD Series Class D 1.5 ohm Stable Monoblock Amplifier
RMS Power Rating:

4 ohm: 1200 watts x 1 channel
2 ohm: 1200 watts x 1 channel

Total RMS power output: 1200 watts
LED Power/Protect Light
Speaker-level (high-level) inputs (Requires adapter like the Kicker KISL)
1 pair of pre-amp outputs
3-way protection circuitry (thermal, overload, and speaker short protection)
Delivers exceptional audio quality with reduced current draw and heat
Selectable 12-decibel/octave (Butterworth) or steep 24-decibel/octave (Linkwitz-Riley)
Feature advanced rollback protection
Brushed aluminum finish with black powder-coat cast
Black powder-coated gasketed cover provided
Removable power and speaker plugs
RealSink chassis and vertical cast-alloy fins to dissipate heat effectively
RIPS (Regulated, Intelligent Power Supply) technology to adjust amplifier's operation
Single cycle control technology
Optional remote level controller (sold separately)
Offers flexible mounting options via optional stacking kits
Optional stacking kit (sold separately)

Low level: 0.2 - 2 volts
High level: 0.8 - 8 volts

Frequency Response: 6 - 8000 Hz
Total Harmonic Distortion (THD): 0.03%
Signal to Noise Ratio: >110 dB
Variable low-pass filter: 50 - 500 Hz
Subsonic filter: 0 - 30 Hz
Fuse Rating: 100A (AFS, AGU or MaxiFuse)
2 AWG gauge amplifier wiring kit is recommended for installation
Dimensions: 10-13/16" L x 8-13/16" W x 1.93" H
Authorized Internet Dealer
2 Year Manufacturer's Warranty
MFR #: HD1200/1

Frequently Asked Questions (FAQ)

Why does my HD1200/1 put out the same power at 1.5 ohms and 4 ohms?

This is due to JL’s Single-Cycle Control and R.I.P.S. technology. The amp automatically adjusts its internal rail voltage to deliver a consistent 1200W RMS regardless of the speaker impedance (between 1.5 and 4 ohms).

The status LED is flashing Red/Green. Is the amplifier defective?

No. This is a "low voltage" warning. The HD1200/1 is highly efficient but requires a steady power supply. Check your battery and ground. If the voltage drops below 10V during a bass hit, the amp will flash this code to protect itself.

I have no sound and the LED is solid Red. How do I reset it?

Solid Red indicates a thermal or short-circuit fault. Turn off the system and check for a speaker wire touching the car's metal frame. Ensure the amp has at least 1 inch of clearance; it uses its outer "sink" to dissipate heat.

My "Infrasonic Filter" has a switch for 24dB or 12dB. Which should I use?

If you have a ported (vented) box, use the 24dB (steeper) setting at roughly 30Hz. This prevents the subwoofer from "over-excursion" (moving too far) below the tuning frequency, which can snap the woofer's suspension.

Can I stack two HD amps on top of each other to save space?

Yes. The HD series is designed for "Stacking." You must use the JL Audio HD Stack Kit (sold separately). This provides the necessary air gap and secure bolting points to ensure both amps stay cool while mounted together.

The amp turns on, but the output is very quiet even with the gain up.

Check the "Input Voltage" switch. If set to "High" while using a standard low-voltage RCA output from an aftermarket radio, the signal will be too weak. Switch it to "Low" to match the head unit’s RCA signal level.

Does this amplifier require a remote turn-on wire for a factory radio?

Not necessarily. If you use the speaker-level inputs, you can set the "Turn-On Mode" to "Signal" or "DC Offset." The amp will "sense" the audio from your factory wires and turn on automatically without a separate 12V remote lead.

What size fuse and power wire are required for this 1200W amp?

You must use 4 AWG 100% pure copper (OFC) wire and a 100A fuse. Do not use "CCA" (aluminum) wire; the HD1200/1 draws significant current, and cheap wire will cause it to overheat or enter protection mode.

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5 star		91%
4 star		9%
3 star		0%
2 star		0%
1 star		0%

Durability		4.9
Value		4.8
Features		5
Design		4.9
Usability		5

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JL Audio HD1200/1

$1549.99

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Product Highlights

Description

Monoblock Class D Subwoofer Amplifier

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