acid universal stereo hybrid 0011 Mic Pre and 3-Band EQ – H2 Audio Helios11 Series Helios Style Mic Pre and EQ *0011 Series requires a 0011 Rack for power. 0011 Series units will not fit in a 500 Series Chassis. 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 todays modern studio workflow. Step into the control room from the golden era of

11- Series Helios Style Mic Pre and EQ 

*0011 Series requires a 0011 Rack for power. 0011 Series units will not fit in a 500 Series Chassis.

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.

The Most Iconic Mic Pre from the 70’s Golden Era

From the Lustraphone M10 input transformer to custom-wound inductors and gold-plated ELMA switches, every part is engineered for the purest signal path. With 32V rails for massive headroom, the 0011 delivers pristine clarity when you want it and thick, saturated character when you push it.

This isn’t just a reissue. It’s Helios DNA, refined for the modern recording landscape.

Legendary Helios Tone, Modern Studio Ready

• Legendary Helios tone — punchy, open, and alive
• 25–75dB mic gain via Lustraphone M10 input transformer
• Custom inductor-based LF/MF EQ + fixed 10kHz shelf
• Transformer-balanced output with 600Ω drive up to 25dBm
• Gold-plated ELMA rotary switches & conductive plastic pots
• Fits 0011 Series racks: H2 Audio 002, 004, and 008 rack

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.
• Power: Runs on H2 Audio 002, 004, or 008 racks

Bring Helios into your signal chain.
From vocals and drums to guitar and bass, the 0011 Mic Pre & 3-Band EQ gives you that unmistakable rock authority with the control you need for modern production.