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Customer Reviews

Hertz HMP 4D

Hertz HMP 4D Compact 4-channel powersports amplifier — 50 watts RMS x 4

MFR # HMP 4D

3.5 out of 5 stars
3 reviews
View this product
Love it

Simon from Australia, Geelong on 6/18/2025

Verified customer (What's this?)
Verified employee review (What's this?)

Paired with 120w speakers x 4 and works perfectly. Adjusting the balance in a breeze and wound up full volume and no speaker distortion so very happy with this purchase. My first amp so a newb when it comes to these things but compared to factory unit this setup rocks. Going to get myself a subwoofer next to really make the car shake at the lights ??

Pros:

Cons:

Crutchfield response on

0 of 0 found this helpful

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Lori from BRADLEY, IL on 3/1/2024

2007 Dodge Nitro

Verified customer (What's this?)
Verified employee review (What's this?)

Junk out of the box. Received for Christmas, just installed. Rear speakers don't work. Only 60 day return.

Pros:

Cons:

Crutchfield response on 3/5/2024
Once we saw this review, our Tech Support specialist, Etch, reached out to Lori to help with her amp. Whenever you encounter a problem with anything you purchase from Crutchfield, please contact our Tech Support team right away. Lifetime tech support comes with every Crutchfield purchase.

0 of 0 found this helpful

Taylor

Robert from Taylor,MI on 5/16/2022

2005 Dodge Magnum

Verified customer (What's this?)
Verified employee review (What's this?)

This amplifier was installed in my 2005 Dodge Magnum RT, it Powers the door speakers & the rear hatch speakers. The Magnum was equipped with the premium sound system Boston acoustics and this amplifier is the perfect match! The amp still has plenty of headroom and probably puts out more than 65watts@2ohmn which means in the future when I upgrade my system I don't have to worry about a new 4 channel amp.im able to crank my radio to the max of 50 with no distortion!! For a sub a have a 18inch skat audio evl and my door speakers are able to keep up with no issues! I'll be recommending this amp to France and would not hesitate to buy one for my next project!

Pros: Tons of headroom! Underrated! Compact! Mine is inside my front dash. Fine tuning capabilities!

Cons: None.

Crutchfield response on

3 of 3 found this helpful

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