The 1U Stereo Out from Intellijel is a 1U mono/stereo preamplifier with line level (+4dBu), which is mainly used in Intellijel 7U cases. The module is used together with the separately available 1U Stereo Out Jacks (part number SYN0007113-000) or can optionally be used with the fixed outputs in the Intellijel 7U Case. It converts audio signals from mono to stereo and brings the higher Eurorack level to the standardized line level.
Works great, easy to plug in, instillation is a tdght squeeze though. Module is made to have very little clearance between the circuit board and the two rails it fits between, which would be fine except for the slight protrusions on both sides of the circuit board where it's been cut, made it a tight squeeze and I really had to put a lot of force onto the module to get it to go into place.
Works fine and connects to the stereo outputs to an Intellijel case but I would've liked/expected it to have chain-in so you send other module outs to the back. If that's what you're looking for then go for the "Intellijel 1U Stereo Mixer" instead.