Citation

This manual is based off of the PreSonus HP4 Manual Version 1.0 and is used with permission from PreSonus.

HP4 FRONT PANEL BASIC LAYOUT

The front panel on the HP4 is divided into three sections. These are the potentiometers (knobs), headphone jacks, and buttons:

Headphone Volume

The HP4 has the potential to be very loud (it goes to 12). Please be careful when you first start passing sound through the unit. It is generally a good idea to start with the volume set at 1 and then bring the volume up.

Monitor Level

The monitor level knob corresponds to the output volume of the output on the back of the HP4. The level can be muted by pressing the Monitor Mute button.

Mono

When the Mono button is pushed in, each input will be summed together on each output. For example, if you plug a CD player into the left input and press the mono button, the signal from the left input will be present in the left and right headphone and master output. When the Mono button is not pushed in, the left output will have the left input signal and vice-versa.

Monitor Mute

The monitor mute button is handy when you are only using the headphone outputs and dont want to use the Master Outputs. Also, it enables the user to hit one button rather than turn down the volume knob for the Monitor Level. A good use of this button would be for recording in front of a computer or DAW. When a mic is on, the Monitor Mute button would be pushed in to prevent feedback. When the recording/performance is over, the mic could be muted and then the Monitor Mute button would be disengaged.

BACK PANEL BASIC LAYOUT

Input

The input jack accepts balanced/unbalanced tip-sleeve or tip-ring-sleeve connectors. The input can handle up to +24dBu unbalanced levels.

Output

The output jack accepts (balanced/unbalanced) tip-sleeve or tip-ring-sleeve. The output will deliver up to +24dBu in signal level unbalanced. These outputs are designed to be connected to the power amp of your studio speakers, to the inputs of self amplified speakers, or to another HP4.

APPLICATION GUIDE

The HP4 can be hooked to another processor, such as the COMP16 or TubePre in a live or studio environment. We do recommend that whenever possible, balanced cables be used. An example of a balanced cable would be a TRS (Tip Ring Sleeve). A balanced cable is preferred because it generally has a greater level of noise rejection. In other words it is less susceptible to outside interference.

Use with a Console

The HP4 can be connected to the headphone output of a console/mixer to multiply the headphone outputs. Care should be taken that the headphone output level of the console/mixer is not set to high. Setting the output level to the HP4 too loud, could cause the unit to distort. The monitor outputs are designed to be connected to the power amp of your studio speakers, to the inputs of self amplified speakers, or to another HP4.

HP4 SPECIFICATIONS

Number of Channels: 1 in 5 out

Dynamic Range: >115dB

Signal to Noise Ratio: >95dB

Headroom: +22dBu

Frequency Response: 10Hz to 50kHz

Input Impedance: 10kOhms

Master Output Impedance: 51 Ohms

THD + Noise: <0:002%

Internal Operating Level : +0dBu = 0dB

Headphone Output Power: 150mW

Input Connectors: 1/4”, Tip Ring Sleeve

Master Output Connectors: 1/4”, Tip Ring Sleeve

Power Supply: External, Linear Supply

Power Requirements: 16VAC, 1000mA, 20 Watts

Weight: 4 lbs:

Size: 5:5”X5:5”X1:75”

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