Warm Audio WA273-EQ 2-channel Microphone Preamp & EQ
Warm Audio WA273-EQ 2-channel Microphone Preamp & EQ
Warm Audio WA273-EQ 2-channel Microphone Preamp & EQ
Warm Audio WA273-EQ 2-channel Microphone Preamp & EQ

Warm Audio WA273-EQ 2-channel Microphone Preamp & EQ

Regular price $1,599.00
Unit price  per 
Shipping calculated at checkout.

The WA273-EQ is a “Desert Island” boutique preamp, but it can also be classified as a studio and live work-horse. Classic '73-style preamps are known for being versatile tools that work with all kinds of microphones from Condenser, to Dynamic, to Ribbon. The WA273-EQ equally shines on all types of microphones and sources including; vocals, acoustic/electric guitars, bass, drums, percussion, orchestras, keyboards, and even as a tone shaping tool to run partial or complete mixes through. With 80dB of gain and a fully discrete Carnhill Transformer balanced signal path, there’s no recording, mixing or engineering task that the WA273-EQ can’t handle.

An important part of these classic British circuits not often discussed is the different styles of capacitors and output transistor used. Is important to maintain integrity to the original design by using tantalum and polystyrene capacitors in the signal path and an output transistor choice that is much smoother in the high gain settings than what is typically found in modern '73-style reproductions.

A great sounding '73-style circuit should be just as reliable as it is great sounding. The complex dual concentric switch potentiometers in the EQ sections of the WA273-EQ are made in the UK by Blore Edwards who manufacture military spec switches and potentiometers. The use of Blore-Edwards components is no small inclusion for a '73-style preamp-eq in this price range.

Classic '73-style preamps were often hand-wired and so is the WA273-EQ! Guru’s claim that a portion of the sought after classic British tone can be attributed to the hand-wired nature of the build. The WA273-EQ is hand-wired and hand assembled, including the pcb components that are all populated by hand.


  • Dual-channel, class a, '73-style british microphone preamp with eq
  • Uk made carnhill transformers
  • Uk made - blore edwards eq dual-concentric switch potentiometers
  • Hand wired, hand assembled
  • 80db of gain - resistor stepped gain switch
  • Fully discrete
  • Tone button - changes input transformer impedance for varying tone
  • Polarity switch
  • 48v phantom power
  • Low band boost/cut - 35, 60, 110, 220 hz
  • Mid band boost/cut - 360, 700, 1600, 3200, 4800, 7200 hz
  • High band boost/cut - 10, 12, 16 khz
  • Additional high band frequency eq points added (compared to vintage 1073)
  • 4 position inductor based hipass filter - 50, 80, 160, 300 hz
  • Xlr mic inputs (front & back)
  • Line level trs input
  • Ts send/receive insert jacks
  • Xlr & trs line level outputs
  • Direct in, instrument input
  • Output control
  • Led level indication
  • Freq response 20hz - 20khz +/-.5 db
  • 19" rackmountable
  • Internal iec 115v/230v power inlet