Check the listing for details. Presonus Eureka Preamp With special A/D card. Condition: Used. Listed at 425.00 USD. A Very Special PreSonus Eureka Preamp This PreSonus Eureka Transformer coupled Class A Preamp is a reliable and high-quality audio equipment perfect for any music enthusiast. It features a silver color and is rack-mountable for convenient use. The preamp has a signal gain of 20dB and audio outputs an XLR. It also has audio inputs of TRS/Audio Jack and XLR. This preamp is a great addition to any music gear collection and is perfect for use in a studio or on stage. It has been modified and is free from any custom bundles. The unit type is in pounds and it has a number of channels of 1. The PreSonus Eureka model is a top-of-the-line choice for anyone looking for a reliable and high-quality preamp. An optional 24-bit A-D module is installed via the rear pane operating at all the standard sample rates from 44.1kHz to 192kHz, and providing both AES-EBU and S/PDIF outputs. Since these are both dual-channel interfaces, an auxiliary balanced TRS socket accepts an external analogue line-level signal to access the second A-D channel — the Eureka's own output signal occupying the first digital channel. Light wear and tear. Light on VU meter is out