PreSonus HP4 4-Channel Headphone Amplifier

- TRS impedance: 10K ohms

Panel Controls
- Headphone level: 1 to 12
- Monitor / feed output: - 80dB to + 10dB
- Mono switch
- Monitor / feed mute

Power Supply
- Type: linear
- Input: 16VAC/1000mA

- TRS balanced: 51 ohms impedance

- THD+noise (unweighted): 0.002%
- Noise floor: -98dB
- Signal to noise: >95dB
- Power supply rejection: >98dB
- Power: 16 watts

- Weight: 5lbs.
- Dimensions: 5.5 x 5.5 x 1.75
- Mounting: max rack and universal rack tray
- Chassis: steel
- Panel: brushed aluminum
- Sides: cast aluminum
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 3.25 lbs
Shipping Dimensions: 13 x 8 x 4 in
Manufacturer Part Number (MPN): HP4
Pack with 4 Pairs of HD9 Headphones
Shipping Weight: 7.5 lbs
Shipping Dimensions: 18 x 14 x 7 in
Manufacturer Part Number (MPN): HD9 / HP4 Pack
PreSonus Warranty Presonus offers a one year warranty (parts and labor) on all new products. All non-new Presonus products are not covered by any warranty.
If you have additional warranty questions, please contact the manufacturer at 225-216-7887
(15 ratings)
Submitted January 16, 2010 by a customer from
"Transparent and powerful. Great deal for the money."
This review has been selected by our experts as particularly helpful.
I don't know why I would replace it (although it's annoying that I can't turn it off). When I bought it - it was as an afterthought with a couple of sets of $250 headphones. The salesman gave me a little deal on it. For that price I didn't expect for it to be nearly as good as it is sound-wise. If it was stolen I'd probably just get another one. I can't hear the difference between plugging my phones into it - or directly into my Fireface 800. To me, that's the holy grail of headphone amps: same sound, more channels.

I can't believe some of the negative things I'm reading about this headphone amp. Maybe they got unlucky, or I got lucky or... something. Mine has done nothing but work flawlessly since I bought it. It is transparent and powerful - which is exactly what I need. I haven't used the monitor out, but as a headphone amp - it's perfect.

I think the manufacturer put their money into excellent sound quality. The features are sparse. I wish I could turn it off without unplugging it. I wish they had used taper pots instead of linear pots for the volume controls. The usable gain range is small. It's built solid.

Ease of Use
The other side of lack of features is ease of use. There's not much to know here. Plug it in and go.

For my use in the studio it has been a rock. Because it doesn't have an off read more switch, it's basically been running for three years continuously with no problems. I wouldn't hesitate to take it on the road. I suppose you never know for sure from looking at the outside of a product, but this one looks as if its built to take it.

Compared to other units that do the same job, this one is a little more expensive and has fewer features. On the other hand, the quality of the sound is considerably better than others I've used. Other people who have recorded with me have noticed how transparent it is and asked what they were listening to.

Manufacturer Support
I haven't dealt with the company who made it because nothing has gone wrong with it. That's my favorite kind of service: built-in.

The Wow Factor
It's a truck. There's nothing fancy about it. It wouldn't catch your eye. It just works.

Musical Background:
Current hobbyist, former touring musician

Musical Style:
Rock, Fusion, Ambient
read less
11 of 11 people (100%) people found this review helpful. Did you?
Thanks for your opinion!
Shipping to
Chat With Us