Actually, I was looking for this information for 3 years!...now thanks to you, the manual is on my hands and of great help, cause I understand now where I was doing wrong connections and wires...excellent, I'll be back to you if in need, thank you.
This manual covers the main equipment features only. While it also includes the procedure for saving and loading from the now long obsolete memory cards it does not mention the how to operate with the optional floppy drive interface so I am still at a loss about how to use this! Note that there is a separate manual covering the MIDI interface and programming via the keyboard, not included in this download. You will also need to get hold of this if you want to use the MIDI interface properly. Basically there is little difference between this manual and the free to download manual for the similar PR60 model.
Good list of manuals. I found a very rare one and easily get. Should be promptly to download, as we must to wait hours even after confirmed payment.
Text excerpt from page 23 (click to view)
PRESONUS
4.1
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