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New Radial Engineering 500 Series WR-8 Workhorse 8-Slot Power Rack

Original price $960.00
Current price $799.00
SKU R700 0101

The 500 Series WR-8 Workhorse 8-Slot Power Rack from Radial Engineering is the 3-space rack-only portion of the 8-slot Workhorse designed to fit standard 19" rack enclosures. It follows the guidelines set out in the Workhorse open-source document (Whos-Doc). It accommodates the latest Radial modules while being backward compatible with older formats. This means that it will work with all 500 series modules. Regarding the audio performance, unless the WM8 8-Channel Mixer (sold separately) is added, there is no audio circuitry other than connectors. The WR8 will not introduce any color, distortion, or artefact.

As a power supply and connector platform, the WM8 Mixer (sold separately) employs gold plated 15-pin EDAC card-edge connectors on the inside and nickel-silver Neutrik connectors on the back panel for signal transfer. A convenient set of D-Sub connectors has been added to interface with popular workstations. Each slot is equipped with an auto-resetting fuse to protect the system should a faulty module be employed. A 1600mA external supply provides plenty of current to feed the modules and 48V for phantom power. Adding the WM8 Mixer (sold separately) brings the WR8 up to full Workhorse functionality.

Like the Workhorse, the WR8 features eight slots to accommodate both Radial modules and other API Lunchbox compatible modules. This Power Rack features a slide-in tray that makes loading modules easy. Rear connections include XLR and ¼" TRS inputs and outputs plus parallel connections via D-Subs. The WR8 features a ‘Feed’ switch that lets you connect modules in series by simply setting the switch to suit. This leaves the other connectors open for mult’ing, parallel processing, and cross patching.

With this Power Rack, the stereo-ready modules such as compressor-limiters no longer need to have inside traces soldered. A simple ‘Link’ switch performs the connection and lets you revert back to normal without de-soldering. It also features an Omniport, a ¼" TRS connector that enables the manufacturer to assign a special module-specific function to increase functionality.

The WR8 Power Rack provides extra power to the modules for more headroom with over 1600mA of shared power for the 8 slots. This enables you to use high-power devices like tube preamps with confidence. The external supply makes international travel easy with 100 to 240V compatibility and the use of a standard IEC connector. To keep modules safe, the WR8 is equipped with protective circuitry to prevent mishap should improper connections be made.

The WR8 is suitable for multi-channel recording. Simply load it with 8 preamps and connect your favorite studio mics and DI boxes. Use the ¼" TRS direct outs on each channel to feed the recorder and the XLR outs to feed the PA system.

You can pair up 2 Powerpres with Q3 two coil EQs and 2 Komit compressors to create the ultimate stereo channel strip. For imaging and depth, add in a PhazeQ to channel-2 in order to phase align the 2 mic channels.

You can also rack up the X-Amp Reamper, the EXTC guitar effects router and then pass the signal back into the JDX to simulate a guitar amp. Run it all through the Tank Driver and a real spring reverb for more fun.

Slotted for Action

8-slot Power Radial employs standard card-edge connection for the modules and is fully compatible with all 500 series modules


Mil-spec double sided PC boards with full surface ground plane ensures signal purity is maintained while noise and crosstalk are kept to a minimum

Tough Radial Built

Its 14-gauge steel construction provides durability and maximum shielding against noise and is standard 19" rack compatible

Easy-Guide Tray

Easy-guise raised tray lets you insert and remove modules without fumbling around; fits both single and double wide and can be removed when using non-standard sizes

Pooled Current Flow

Current pool lets you share 1200mA among 8 slots so that you can connect tube preamp modules and get maximum performance

Stereo Link

Lets you combine stereo modules with the flip of a rear mounted switch


Lets you configure the Workhorse slots in series to create your own channel strip without cables such as a mic preamp into an EQ and then a limiter

Inside Connections

Gives you individual XLR and ¼" TRS inputs and outputs on each channel slot for easy connectivity

Deep Power Tool

Lets you combine stereo modules with the flip of a rear mounted switch

Well Grounded

Star grounding is no problem with easy-access external ground lugs

Octopus Handshake

Equipped with 8-channel D-Sub connectors for easy connection to ProTools rig and all other tools

Personality Jack

Omniport allows each manufacturer to design-in a special function to best suit their needs


Upgrades to full Workhorse with mixer (sold separately)


100% compatible with older API type racks