Hardware Reference
Look up your unit's capacity, power, connectors, and what its relay matrix can carry. To cable your Devices, see Connecting Devices.
Models
A ProPatch model number is the total number of patch points in a symmetrical matrix: half inputs, half outputs. A ProPatch 128 is 64 inputs × 64 outputs, not 128 of each.
| Model | Matrix (in × out) | Rear Ports | Front-panel Port IDs | Front/rear sharing |
|---|---|---|---|---|
| ProPatch 32 | 16 × 16 | A–B | FP1–FP16 | Every front channel shares a path with a rear channel: FP1–FP16 = A1–B8 |
| ProPatch 64 | 32 × 32 | A–D | FP1–FP16 | FP1–FP16 share paths with C1–D8; Ports A–B are rear-only |
| ProPatch 128 | 64 × 64 | A–F | FP1–FP16 | None: the front channels are their own 16 matrix channels |
| ProPatch 200 | 100 × 100 | A–L | FP1–FP16 | FP1–FP12 share paths with K5–L8; FP13–FP16 are front-only |
A shared front/rear pair is one path with two jacks and two Port IDs; only one can be active at a time. For the full map on each model, see Front and rear Port IDs that share a path.
Wolffhound shows the model as a badge such as PP128R; the ProPatch app header shows it under PRO PATCH.
Install and power
Warning: power the unit only from the included ProPatch power supply. A lookalike USB-C supply can light the unit and let Wolffhound find it while delivering too little power to switch the relays. Label the supply and keep it with the unit.
- Mount the unit in your rack with suitable rack hardware.
- Connect the included supply to either rear USB-C port, A or B.
- Turn on the unit.
- Wait for the indicator to settle to steady green before testing control or audio.
The rear panel marks the USB-C connection for 100 W, but choose the included supply, not a replacement with the same wattage. Keep the original packaging for service or transport.
LED states
| Indicator | Meaning | Action |
|---|---|---|
| Steady green | Powered and healthy | Continue setup |
| Slow red | Power problem | Check that the included supply is connected correctly |
| Sustained fast red | Hardware fault | Stop and contact Wolff Audio support |
A brief startup indication that settles to green is normal. If the unit never reaches steady green, don't continue to audio troubleshooting.
Control connection
Use Ethernet or USB. You don't need both.
| Connection | How |
|---|---|
| Ethernet (recommended for permanent installs) | Connect your network to the rear jack labeled Control. The Dante jack is a separate interface and does not connect the unit to Wolffhound. |
| USB | Power into one USB-C port, computer data into the other. Either port works for either role. |
Wi-Fi isn't enabled.
Audio architecture
ProPatch switches audio with relays, so a route is a straight wire: no gain, attenuation, buffering, conversion, or processing. ProPatch changes where a signal goes, not what it is.
The matrix is directional:
ProPatch input → relay connection → ProPatch output
- A route always runs from a ProPatch input to a ProPatch output. It can't turn an input into another input or an output into another output.
- The matrix can't mix or sum. One Source can feed several Destinations through a Mult (Advanced Routing), but several Sources can't combine into one Destination. Stereo-to-mono needs external summing hardware.
- Each physical path is exclusive, even when several Nodes describe it.
Switching is a mechanical click from the unit. The relays are latching. After a power cycle, recall your Session and confirm critical routes. See Troubleshooting.
Signal types
The relay path can carry mic, line, and instrument level, 48 V phantom power, AES/EBU, and control voltages, triggers, and gates, if the cabling and equipment suit the signal.
Phantom power
ProPatch passes 48 V phantom power but doesn't generate it; the connected preamp or other source does.
Before you repatch a phantom-powered microphone path:
- Mute monitors and downstream destinations.
- Don't route 48 V to line-level equipment.
- Don't assume a Mult is safe just because the ProPatch app allows the route.
Rear connections
| Connection | What it's for |
|---|---|
| DB25 analog I/O | Each DB25 Port is a group of eight channels named by a letter. A channel's Port ID is the Port letter plus its number: Port A holds A1–A8, Port B holds B1–B8, and so on for your model's Ports. The IN FROM DEVICE row takes your Devices' outputs; the OUT TO DEVICE row feeds your Devices' inputs. |
| Control (RJ45) | Wired Ethernet control. Connect your computer or studio network here. |
| Dante (RJ45) | Network interface for the optional digital hardware. It doesn't carry control. |
| USB-C A and B | Power and control. Either port accepts the included power supply; the other can connect directly to a computer for control. The panel is marked USB-C 100W. |
Trace both ends of every DB25 breakout; don't rely on how another patchbay is arranged.
Front connections
Front-panel layouts differ by model and can include TT points, XLR combo inputs, and ¼-inch TRS outputs. Front-panel Port IDs start with FP. Some front channels share a matrix path with a rear channel, so only one can be active at a time; see Front and rear Port IDs that share a path.
The ProPatch 128 front panel has:
| Connector | Count | Port IDs |
|---|---|---|
| TT outputs | 16 | FP1–FP16 |
| TT inputs | 16 | FP1–FP16 |
| XLR combo inputs | 4 | Normalled to TT inputs 13–16 |
| 1/4-inch TRS outputs | 4 | Normalled to TT outputs 13–16 |
The XLRs are inputs only; the TRS jacks are outputs only. Sharing a combo shell doesn't make them bidirectional. A TT plug in channels 13–16 breaks the normal and takes over the channel. That's a hardware jack normal, unrelated to a Chain's N.
Older Device files may use the prefixes P or TT; the app reads them as FP.
Dante and digital options
The Dante jack alone doesn't mean your unit passes Dante audio. Dante audio needs the factory digital option with its converters.
With the option, each digital channel shares a matrix path with an analog channel, so you use one or the other per channel. Set up subscriptions in Audinate's Dante Controller, then route the digital Nodes like any other. See Connecting Devices for modeling a converter.
More than one unit
Ethernet doesn't merge units into a bigger matrix; cross-unit audio needs tie lines. See Multiple ProPatch Units.