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Hertz Digital Power Series 4-Channel Amplifier - HDP 4

Abt Model: HDP4 | UPC Code: 8018823108089
Hertz - HDP 4 - Car Audio Amplifiers
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Regular Price $599.99
Up To 1000W On 2 Channels At 4 Ohm/ Thermally Optimized Double Extruded Heatsink/ Ergonomic And Aluminium Die-Cast End Caps/ Full Range Pre-Out/ Automatic Remote Turn-On/Off Function/ 4 LEDs Monitor The Status Of The Amplifier/ Black Finish
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Mar 2nd - Mar 3rd *

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Product Details

Hertz Digital Power Series 4-Channel Amplifier - HDP4

HDP 4 is a D-Class four-channel amplifier, perfect to satisfy any need. It is the most compact HDP; nonetheless, like the other models, it can reach very high power levels: in less than 30 cm (12 inches) it can provide up to 1000W on 2 channels at 4 Ohm! It can be used in full range as well as with crossover settable as Lo-Pass/Hi-Pass.

It has been thought to offer the user the maximum possible flexibility, both thanks to Speaker In and RCA inputs and to the controls, with a status monitor communicating to the user through a LEDs system. Using Speaker In inputs, the ART™ ( Automatic Remote Turn On-Off) function is available; the user can also switch it off.

HDP 4 is the perfect choice for those who look for performance and non-bulky sizes. The double-extrusion heat sink and the Hertz logo, which is back lit and can be rotated, allow especially sophisticated installations.


  • Thermally optimized double extruded heatsink, ergonomic and aluminium die-cast end caps
  • 4 LEDs monitor the status of the amplifier and communicate with the user
  • Special balanced input circuitry to reject electromagnetic disturbances present on the Pre-amplified or Speaker level inputs;
  • HDP Input featuring either Speaker In (OEM radio) and RCA In (Aftermarket radio) inputs
  • ART™, Automatic Remote Turn-On/Off function, automatically turns on and off the amplifier when the OEM radio turns on and off (available on Speaker In only)
  • Full range Pre-out, also available when using Speaker Level In inputs
  • 12 dB/Oct. continuously adjustable (50 to 5k Hz and 80 to 3.3k Hz) active crossover with Lo-Pass/Hi-Pass or Full Range settings
  • A/B Input switch eliminates the need for RCA Y-Adapters
  • Power supply stage featuring multiple winding transformer, Low-ESR 105°C capacitors, D-Class 2Ohm stable output stage based on solid T220-5pin power Mosfets


  • Channel Model: 4 - 3 - 2
  • Output Power(RMS) @ 14.4 VDC, THD 1%
    • 4 Ch 150 W x 4 (4Ohm)
    • 4 Ch 250 W x 4 (2Ohm)
    • 3 Ch 150 W x 2 (4Ohm) + 500 W x 1 (4Ohm)
    • 3 Ch 250 W x 2 (2Ohm) + 500 W x 1 (4Ohm)
    • 2 Ch 500 W x 2 (4Ohm)
  • Distortion - THD (100 Hz@ 4Ohm): 0,08%
  • S/N Ratio (A Weighted@ 1V: 100 dB
  • Damping Factor (100 Hz @ 4Ohm): 50

Approximate Dimensions:

  • Unit: 6.73" x 11.18" 1.83"

Approximate Weight:

  • Shipping: 10 lbs
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More reasons to buy the Hertz HDP 4 from Abt Electronics
  • is an authorized dealer (Learn More).
  • The Hertz HDP 4 is Brand New.
  • The Hertz HDP 4 Ships in a Factory Sealed Box.
  • Abt ships this product for free!
Number of Channels4-Channel


by PowerReviews
Hertz Digital Power Series 4-Channel Amplifier

(based on 3 reviews)

Ratings Distribution

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Reviewed by 3 customers

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Most exciting amp I have ever purchased!


from DC

Verified Buyer

Comments about Hertz Digital Power Series 4-Channel Amplifier:

Best amp I have ever purchased!

  • Was this a gift?:
  • No

ABT customer service is top notch


from Indianapolis

Verified Buyer

Comments about Hertz Digital Power Series 4-Channel Amplifier:

If you a looking for a small amp with plenty of power for any speaker out there. This is it. Very user friendly amp. With all the controls right on top of the amp this amp is very easy to set up. I set this up on my 2007 Harley Davidson motorcycle.

Service and delivery comments:

Excellent customer service from ABT and very fast shipping.

  • Was this a gift?:
  • No

Tiny Powerhouse


from Deerfield, Illinois

Verified Buyer

Comments about Hertz Digital Power Series 4-Channel Amplifier:

Don installed this in my Harley CVO Ultra because we wanted maximum power given minimum space. This little powerhouse powers six Focal speakers with authority! The sound and clarity is matched by NO other system I have ever heard!!

  • Was this a gift?:
  • No

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Hertz Digital Power Series 4-Channel Amplifier

Hertz Digital Power Series 4-Channel Amplifier

In Stock

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