DIY Recording Equipment

PR502 2-Slot 500-Series Chassis Kit with External Power Supply


  • Full Kit
  • Step-by-Step Guide
  • Supported
  • Intermediate

The PR502 is a 2-channel, high-current, 500-series chassis in a desktop or 19" rack-mount format. The assembly process is fairly simple, and does not require dealing with wall power.

Rugged and refined

The PR502's minimalist, all-black chassis is made from anodized aluminum and powder-coated steel. The compact case fits into any desktop setup, while the optional rack ears make the PR502 compatible with standard 19" racks.

High-current, low-noise

Our custom, universal power supply provides up to 250mA of clean current per channel—almost double the 500-series spec—and can power up to four PR502 racks (eight modules). Additional filtering and regulating in the chassis ensures that the power for your modules is stable and dead quiet.

Simplicity is a feature

While the PR502 is designed with an emphasis on simplicity, it is a full-featured 500 rack.

  • THRU jack for powering additional racks
  • LED power indicators for +/-16 and +48v
  • Neutrik XLR audio jacks
  • FEED feature turns your PR502 into a channel strip by patching channel 1 into channel 2 without a cable
  • Compressor link
  • 11" x 8" x 1.7" without rack ears

Beginner friendly

Assembling the PR502 is safe and easy, thanks to the external power supply and our step-by-step instructions.

Estimated build time: 1 hour


Unfortunately, the following brands' modules are wider than the 500-series specification and do not fit in the PR502:

  • Rupert Neve Designs
  • AudioScape

Customer Reviews

Based on 12 reviews
Excellent product and support

I had a hell of a time figuring out some issues with my build (PR502 + 2 color pres). Ended up needing to send in for repairs. Peterson was incredibly helpful and got my build working correct. Sounds great and can't wait to use it on some upcoming projects. Thanks guys!

Jim A.
Great 500 chassis in a small package

I've been through several kits among different purveyors. This was well laid-out, with excellent instructions. The unit is all metal, and well machined. I just wish there was an on/off switch. It's well worth the money, especially when you consider that you can stack a few more chassis with the single power supply. Highly recommended!


Well thought out (and well built). This is EXACTLY what is needed to throw a couple of 500 series modules in a backpack and go. Absolutely perfect (almost ... doesn't fit AMS Neve)


Rick Carpenter
Awesome Product

Perfect for my semi professional studio

Rich W
A Very Useful Product

I have a bunch of larger 500 series racks but bought this one because I was tired of unloading an 11-space rack when I wanted to fire up a new module for the first time. I bought this because I love every DIYRE product I have bought to date, and to use this for module power-up and diagnostics. And If I need a couple extra channels of something in the studio I can just carry it over and use it for a session as well!

Highly recommended!!

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