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JL Audio HD750/1

750W RMS Class D HD Series Monoblock Car Amplifier

JL Audio
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• 750 watts x 1 channel @ 4 ohm
• 750 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 1.5 ohm Stable Monoblock Amplifier

Learn more about the hd7501
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Product Highlights


• 750 watts x 1 channel @ 4 ohm
• 750 watts x 1 channel @ 2 ohm
• Total RMS Power: 750 watts
• Class D 1.5 ohm Stable Monoblock Amplifier

Description


JL Audio brand icon

Authorized dealer

Monoblock Class D Subwoofer Amplifier

The JL Audio HD750/1 is a high-performance monoblock amplifier designed specifically for audiophiles who demand massive power from a compact footprint. Part of JL Audio’s flagship HD series, this amplifier uses Single-Cycle Control and R.I.P.S. (Real-Time Intelligent Power Supply) technology to deliver consistent, clean power regardless of your vehicle's battery voltage or speaker impedance.

The HD750/1 is a master of efficiency. It produces its full 750W RMS into any load between 1.5-ohm and 4-ohm. Its ultra-compact "RealSink" chassis utilizes vertical cast-alloy fins to dissipate heat without the need for noisy fans, and its stackable design allows for clean, multi-amplifier installations in tight spaces.

Product Details:

  • HD Series Class D 1.5 ohm Stable Monoblock Amplifier
  • RMS Power Rating:
    • 4 ohm: 750 watts x 1 channel
    • 2 ohm: 750 watts x 1 channel
  • Total RMS power output: 750 watts
  • LED Power/Protect Light
  • 1 pair of pre-amp outputs
  • Signal sensing remote turn-on
  • 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)
  • Input sensitivity:
    • 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: 111 dB
  • Variable low-pass filter: 50 - 500 Hz
  • Subsonic filter: 0 - 30 Hz
  • Fuse Rating: 60A (AFS, AGU or MaxiFuse)
  • 4 AWG gauge amplifier wiring kit is recommended for installation
  • Dimensions: 10-13/16" L x 8-13/16" W x 1-15/16" H
  • Authorized Internet Dealer
  • 2 Year Manufacturer's Warranty
  • MFR #: HD750/1

Frequently Asked Questions (FAQ)


Check your ground first. The HD750/1 is highly sensitive to voltage drops. Use a multi-meter to ensure you have 12.6V+ at the amp terminals. A loose or painted ground point is the #1 cause of false protection codes.
This indicates "Thermal Protection" or "Clipping Prevention." The amp is getting too hot or the input signal is too high. Ensure there is 2-3 inches of clearance around the heat sink for airflow and back off the gain.
Yes. Thanks to R.I.P.S. technology, this amp adjusts its internal rail voltage to provide exactly 750W regardless of whether your load is 1.5, 2, or 4 ohms. You don't need to change any manual switches for impedance.
Set the switch to "On" and the dial to roughly 5Hz below your box's tuning frequency (usually 25-30Hz). This prevents the woofer from over-excursion and "bottoming out" in the cabinet, which can destroy the voice coil.
Check the "Input Voltage" switch. if you are using RCA cables from an aftermarket radio, set it to "Low." If you are tapping into factory speaker wires, set it to "High." Setting this incorrectly will result in very low output.
No. JL Audio strictly recommends a 4-gauge 100% copper (OFC) power and ground wire. Using thin or CCA (Copper Clad Aluminum) wire will cause the amp to starve for current, leading to overheating and shut-offs.
Yes. Unlike some other JL models, the HD750/1 does not have "Signal Sensing" turn-on. You must connect the "Remote" terminal to a switched 12V source (like a cigarette lighter or the radio's remote output) to wake it up.
Ensure you are using the HD-RLC knob specifically. Other brands or even older JL knobs (like the RBC-1) use different internal resistance and will not work correctly with the HD series digital control port.

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Specifications & Details


Key Features
Amplifier Key Features
Speaker Level Inputs
Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
750 watts x 1 channel
RMS Power @ 3 ohm
750 watts x 1 channel
RMS Power @ 2 ohms
750 watts x 1 channel
RMS Power @ 1.5 ohm
750 watts x 1 channel
Amplifier Specifications
Series
HD Series
Amplifier Class
D
Number of Channels
1 - Mono
Total RMS Power Output
750 watts
Maximum Input Gauge Size
4 AWG
Minimum Impedance Unbridged
1.5 ohm
Minimum Impedance Bridged
Not Bridgeable
Frequency Response
6 - 8000 Hz
THD at Rated RMS Power
0.03%
Speaker Level Inputs
Yes
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
High-Pass (HP)
Full (AP)
Subsonic
High-Pass Crossover Frequency
50 - 500 Hz
Low-Pass Crossover Frequency
50 - 500 Hz
Subsonic Filter
0 - 30 Hz
Signal-to-Noise Ratio
111 dB
Remote bass/level controller
Optional (Accessory required and sold separately)
Fuse Rating
60A x 1 
Total Fuse Rating
60
Strappable
No
Amp Bluetooth Connectivity
No
Hi-Res Certified
No
Low-Level Input Sensitivity
0.2 - 2 volts
High-Level Input Sensitivity
0.8 - 8 volts
What is in the box?
Paperwork
User manual
Warranty/Registration card
Brand sticker/decal
WITB: Amplifiers
Amplifier
Mounting screws (4)
Allen wrenches (2)
Other Accessory #1
Mounting feet (4)
Other Accessory #2
Speaker connection plug(s)
Other Accessory #3
Power input plug
Warranty and Return Policy
Parts Warranty Duration
2 years
Labor Warranty Duration
2 years
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

HD750/1

Weight:

8.37lbs

Internal SKU:

hd7501

Internal Product ID:

15359

Product and How-to Videos


Customer Ratings & Reviews


JL Audio HD750/1 thumbnail image

5 star
90%
4 star
10%
3 star
0%
2 star
0%
1 star
0%



Durability
4.9
Value
4.7
Features
4.9
Design
4.8
Usability
4.8

Customer Reviews

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Pretty freakin awesome!

Bought this along with the JL Audio 12w7ae and had a custom enclosure built. This was installed in a 2012 Scion tC. Very clean sound and it hits super hard! Best setup I've ever owned. Sonic Electronics was super fast getting the sub and amp to me and at a much better price than anyone else! Highly recommend this setup. Even if you don't get JL, I would still recommend buying from Sonic!

By Cerveza on April 11, 2014

77 found this helpful


Great

I'm pushing a 12W6 with my 750/1 and I couldn't be happier. I should've purchased JL products a long time ago.

By Terrence on May 31, 2011

67 found this helpful


JL HD750/1 mono amp

I have this amp connected to a JL 12w7 prowedge sealed box. it hits pretty good. I wish I would have saved a couple hundred more and baught the 1000/1v2. bottom line is this: if you have limited space and want a great amp then this is the way to go. If you have the room and want one of the best amps made, then buy the JL 1000/1v2 amp. it's an old school analog amp built to give real power. The HD series are digital and dont seem to have the umpff like the 1000/1v2 slash series. It matters what kind of sub you have too. I'm upgrading to a ported 12w7 HO box and the 1000/1v2 amp just cause i know it will sound better. Overall i'm happy, but you know how it is.

By Bud on July 2, 2009

68 found this helpful


Awesome Amp

This amp sounds so much cleaner than other avg quality amps. Very small, barely gets warm. I have it powering 2 JL 12w3 subs in a Sonic brand sealed box. Sounds very nice and clean. Great experience with Sonic on all purchases. Quick shipping, awesome customer service when needed. Keep up the great work Sonic!

By William on December 1, 2011

65 found this helpful


JL Audio HD750/1

I recommed this product i hook it two 12tw3d4 shallow at 4 ohms at 1/4 of level imput and sounds amazing shipping was fast also thanks sonic electronix

By Anonymous on July 1, 2018 Checkmark Icon Verified purchase

41 found this helpful


Expensive, but great performance.

Over all great product not sure if it's worth the price tag, but the performance is excellent and I guess that's hard to put a price on.

By Larry on November 1, 2015

40 found this helpful


By Samuel on October 21, 2023 Checkmark Icon Verified purchase

27 found this helpful


Clean Power

Powering two 12TW3-D8’s in a JL Stealthbox under the backseat of a 2018 F-150. Plenty of power for the job. Seems to stay cool even after driving it hard for 45 minutes. Hard to beat JL quality.

By Valentino on November 26, 2024 Checkmark Icon Verified purchase

14 found this helpful


By Richard on October 13, 2025 Checkmark Icon Verified purchase

1 found this helpful


By ulises on May 27, 2025 Checkmark Icon Verified purchase

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