Dec 28,  · I bought the headphone amp Presonus HP4. Sound is very good (I hear no difference in blind test with Lake People G100), loud with low impedance headphone and a little quiet with my AKG 240 DF but I noticed that the volume have no effect from 12 o'clock position - only first half affects on

The PreSonus HP4 answers the need for a headphone distribution amplifier with professional specifications in a small package at an affordable price. The HP4 features four discrete headphone outputs on the front panel each with its own volume potentiometer and 150mW of amplification per channel. The HP4 also features adjustment over control room

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It turned out to be the headphone amp. 3. The 51 ohm impedance won't properly drive some lower-impedance headphones, such as Audio Technica M50 (35 ohms), or 

Get the HP4 and hear everything loud and clear. You owe it to your music. Features Input/Output 4 screaming-loud (150 mW per channel) stereo ¼" headphone outputs (front panel) 2 balanced ¼" line outputs (monitor outputs) 2 balanced ¼" line inputs Meters, Controls, and Features Headphone level control for each channel

Sorry to make a new thread dudes, I am just curious as i am currently using a Presonus HP4 (50 ohm output impedance) and an Apogee One (30 

General guideline is to have 8-10x lower output impedance (amplifier) than input impedance (headphone) to avoid any wonky distortions in 

The PreSonus HP4 Discrete 4-Channel Headphone Amp allows control over control room monitors with a separate volume knob that can be muted using the Monitor Mute button. 1/3 rackspace. Accepts balanced/unbalanced inputs and outputs (1/4" TRS). Input can either be set to stereo or mono (the mono selector button on the front channel simply copies

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HP4: 4-Channel Headphone Amplifier. Crank Your Headphones to 12! HP4: 4-Channel Headphone Amplifier. HP4. HP4. Overview ; Images and Videos ; Features PreSonus Health, Safety, and Compliance Guide Class B 1.9 MB PDF . Multilingual; Misc.

The loudness of your headphones will vary depending on their design and their input impedance. The output impedance of the HP4 is 51? (ohms), and it will work