01 · Source
3 documented inputs
¼-inch TRS + dc barrel
- Arrives as
- 3 documented inputs
- Connector
- ¼-inch TRS + dc barrel
- Signal
- analog audio
Headphone Amp
PreSonus HP4
PreSonus HP4 4-channel Headphone Amplifier. Plan its source-defined physical connections and placement in your rig.
- Documented outputs
- 66 destination connections
- Documented inputs
- 3Based on documented inputs
- Rack space
- Outside rackPlan a shelf, tray, or stage position
- Power draw
- UnverifiedPower requirement is not verified in the catalog
- Catalog estimate
- ~$149.99Use retailer rows for current price and stock
01 · What it does—and what that changes in your rig.
Product overview
Start with the payoff, then work through how it functions, where it fits, and the details that change a real build.
The payoff
Headphone Amp decisions, organized around the whole rig.
PreSonus HP4 4-channel Headphone Amplifier. Plan its source-defined physical connections and placement in your rig.
- Documented outputs
- 66 destination connections
- Documented inputs
- 3Based on documented inputs
- Rack space
- Outside rackPlan a shelf, tray, or stage position
02 · Know the whole path before you buy.
Signal path
Learn the route as a block diagram: source, product function, transport, and destination. Select any block to see what enters, what changes, and what leaves.
Interactive block diagramAuto-looping · hover, focus, or tap to hold a stage
Port-type signalProduct functionSystem boundary
Follow one signal from source to destination
01 · Source · selectedEach block answers the same three questions: what arrives, what changes here, and what leaves.
03 · What this product asks of the rest of the system.
Compatibility
Treat connector names as the start of the check—not the answer. These are the boundaries that determine a complete working path.
Best fit · Headphone Amp
Use it as headphone amp tracked outside rack rails; follow the manufacturer’s mounting and form-factor guidance.
Plan the companion path
Complete the path with upstream and downstream gear that matches connector, direction, signal type, protocol, and wiring standard.
Connector boundary
Documented connectors: ¼-inch TRS, dc barrel. Match connector, direction, and signal type—not shape alone.
04 · Every connector, grouped by job.
I/O ports
Switch the product view and the documented port inventory updates with it—hardware and data stay side by side.
Every connector, grouped by job.
Switch panels to keep the hardware view and the documented port list in sync.
| Port | Panel | Connector | Direction | Signal | Channels |
|---|---|---|---|---|---|
| PHONES 1 | front | ¼-inch TRS | output | analog audio | — |
| PHONES 2 | front | ¼-inch TRS | output | analog audio | — |
| PHONES 3 | front | ¼-inch TRS | output | analog audio | — |
| PHONES 4 | front | ¼-inch TRS | output | analog audio | — |
| MONITOR/THRU RIGHT | rear | ¼-inch TRS | output | analog audio | — |
| MONITOR/THRU LEFT | rear | ¼-inch TRS | output | analog audio | — |
| INPUT RIGHT | rear | ¼-inch TRS | input | analog audio | — |
| INPUT LEFT | rear | ¼-inch TRS | input | analog audio | — |
| POWER SUPPLY +12VDC | rear | dc barrel | input | power | — |
Showing 9 of 9 documented physical ports.
05 · Compare the decision, not just the price.
Alternatives
The rows are organized around fit, power, I/O, and system role so a cheaper unit cannot hide a more expensive workflow.
| Compare | External unit |  |  | |
|---|---|---|---|---|
| Fit | 📐 Outside rack | 📐 Outside rack | 📐 Outside rack | 📐 1U |
| Power | ⚡ Unverified | ⚡ Unverified | ⚡ 5W | ⚡ 15W |
| Weight | ⚖️ 5.0 lb | ⚖️ 0.7 lb | ⚖️ 1.8 lb | ⚖️ 4.4 lb |
| I/O | 🔌 9 | 🔌 3 | 🔌 3 | 🔌 6 |
| Estimate | 💵 ~$149.99 | 💵 ~$79 | 💵 ~$849 | 💵 ~$999 |
| Deep dive | Current selection | Full comparison → | Full comparison → | Full comparison → |
06 · Resolve the questions that can change the purchase or build plan.
Planning questions
Short, source-backed answers surface rack fit, power, cabling, and connection details before they become surprises.
Where does the PreSonus HP4 live in a complete rig?
The catalog assigns it no rack units. Builder tracks it as non-rack gear; follow the manufacturer’s mounting, case, and form-factor guidance.
How much power does the PreSonus HP4 draw?
Its power requirement is not yet verified in the catalog.
What connections does the PreSonus HP4 have?
9 documented physical ports, including PHONES 1, PHONES 2, PHONES 3, PHONES 4, MONITOR/THRU RIGHT, MONITOR/THRU LEFT.
07 · See this gear inside a complete system plan.
Builder preview
Builder keeps non-rack gear in the same bill of materials, budget, dependency, and connection plan as the rack-mounted system around it.Open in Builder08 · Related gear, in the order you may need it.
Complete the system
Headphone Amp
Rolls PM351 Personal Monitor
Outside rack · 3 ports · ~$79Headphone Amp
Aviom A360 Personal Mixer
Outside rack · 3 ports · ~$849Headphone Amp
Hear Technologies HB-Mix Hub
1U · 6 ports · ~$999
Headphone Amp
Behringer Powerplay HA8000 Headphone Amp
1U · 19 ports · ~$219
Headphone Amp
PreSonus HP60 Headphone Mixer
1U · 11 ports · ~$599External unit
Headphone Amp
Rupert Neve Designs RNHP
Outside rack · 7 ports · ~$699Planning guides for headphone amp systems.
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