H2 Audio Helios 2×0011 Modules + 002 Rack with Independent Output Level Controls

A rare opportunity to own a pair of sought-after 0011 microphone preamps with their famously musical EQ, housed in a 002 rack with the original power supply.

Unlike the standard version, this unit features independent output level controls for each channel, allowing you to push the preamps into their sweet spot while maintaining the perfect level going into your DAW.

This is the unmistakable British console sound that helped define countless classic recordings from the '70s onward, heard on albums by artists such as David Bowie, Led Zeppelin, Pink Floyd, Queen, and many others

Condition is mint. I am the original owner and the unit has lived its entire life in a smoke-free, air-conditioned studio. It has been meticulously cared for and is in excellent cosmetic and working condition.

Included:

• 002 rack
• Original power supply
• Original box

The unit will be carefully prepared for shipping: each 0011 module is protected in its own original box, then both modules and the rack are secured inside an additional outer box for maximum protection. Shipping is fully insured and includes tracking.

The H2 Audio 0011 Mic Pre & 3-Band EQ delivers that unmistakable Helios punch — open highs, tight lows, and lightning-fast attack — backed by massive headroom and creamy transformer warmth. Built like the originals, with refinements for today’s modern studio workflow.

Step into the control room from the golden era of rock & roll. The H2 Audio 0011 captures the exact tone and feel of the legendary Helios production modules that shaped countless ‘70s classic hits. Every note comes alive with transient snap, rich harmonic depth, and a musical EQ that shapes without smearing.

H2 Audio '0011' spec

The H2 Audio 0011 faithfully recreates the iconic Helios mic preamp and EQ with precision upgrades:

• Mic/Line Input: Lustraphone M10 input transformer delivers 20dB mic gain before the preamp. Selectable Line, Mic, or Mic with 20dB pad.
• Gain Control: 25–75dB gain in 5dB increments.
• EQ Section: Custom-wound inductor-based LF/MF EQ with selectable LF (60, 100, 200, 300Hz boost) and MF (0.7–6kHz boost/cut), fixed 10kHz HF, and variable 50Hz high-pass filter.
• Switches: Gold-plated ELMA rotary switches and conductive plastic pots, sealed for longevity.
• Output Stage: Transformer-balanced line out, original Helios design, 600Ω drive up to 25dBm before clipping.