The Warm Audio WA73 is a top quality, fully descrete mic preamp that's part of their WA73 lineup.The Venerable 1073 and the WA73 Series: This series offers single- and dual-channel re-creations of the classic British 1073 preamp (both with & without EQ), that each pay humble and meticulous homage to the original circuit.Pro engineers would unanimously agree that if there's any one preamp that has defined the tone of pop/rock records over the last half-centurey, it would most definitely be the venerable 1073. It has been a huge part of recording and live audio applications for decades and is still considered to be at the top of the game regarding preamps today.It was imperative, when Warm Audio decided to release the WA73, that it pays respectful homage to the legendary British console history in both design and performance. The tone as well as sweet character that the vintage units deliver is so unique and familiar, that the idea was to only release truly sonically accurate replicas. Years of R&D, careful reverse-engineering, and countless hours of auditioning have all resulted in the WA73.A “Desert Island”, boutique preamp, the WA73 makes for a great studio and live sound work-horse. The classic 1073 was known for being a flexible tool that could work with all kinds of microphones: Condenser – Dynamic – Ribbon. The WA73 equally shines when working with all kinds of mics and sources, including: vocals, acoustic/electric guitars, bass, drums, percussion, orchestras, keyboards, and even as a tool for tone shaping to run partial or even complete mixes through. The unit's 80dB of gain and fully-discrete Carnhill Transformer-balanced signal path combine ensure that there's no recording, mixing, or engineering task that the WA73 can't handle.Hand-Wired & Hand-Assembled: Just like the classic 1073, the WA73 is hand-wired. Those in the know claim that part of the 1073's classic tone can be attributed to the hand-wired assembly. Likewise, the WA73 is classically hand-wired and hand-built, including the PCB components – all populated by hand.Warm Audio WA73 Features:Single Channel, Class A, 1073-style British Microphone PreampTONE button – changes input transformer impedance for varying tone4-position inductor-based hipass filterUK-made Carnhill TransformersHand-wired, hand-assembledAvailable phantom power19" rack-mountableOutput controlFully discreteWarm Audio WA73 Specifications:80dB of gain – resistor-stepped gain switchPolarity switch48v phantom power4-position inductor-based hipass filter: 50/80/160/300 HzXLR mic inputLine-level TRS inputTS Send/Receive insert jacksXLR & TRS line-level outputsDirect In, instrument input1RU 19" rack-mountableLED level indicationGround-lift switchInternal IEC 115v/230v power inlet Warm Audio WA73 Single-Channel British Mic Preamplifier.