0011/Stereo 2-Channel Mic Pre/EQ 19' rackmount

Two Classic Helios Channels. One Rugged Rack.

A stereo pair of legendary 0011 mic pre/EQs housed in a heavy-duty 19" steel chassis — delivering punch, warmth, and headroom in a ready-to-record format.

The H2 Audio 0011/Stereo takes everything that makes the original Helios 0011 legendary and doubles it. Packed into a rugged 19” rackmount chassis, this unit houses two complete 0011 mic pre/EQ channels — giving you the perfect tool for stereo tracking, dual mono setups, or mix bus shaping.

Each channel features the unmistakable Helios input stage, custom Lustraphone transformer, and inductor-based EQ design that helped define the sound of British rock in the ‘70s. With upgraded 32V rails for greater headroom, transformer-balanced outputs, and modern gold-plated connectors, the 0011/Stereo delivers classic tone with rock-solid reliability. Whether you’re running drum overheads, acoustic guitars, or stereo keyboards, this is the Helios sound in a powerhouse dual-channel rack.

What Makes It Legendary 

• Two Channels of Helios HeritageDual 0011 mic pre/EQ circuits in a single 2U rack — ideal for stereo sources or parallel processing.
• Authentic Helios Input & EQCustom Lustraphone input transformer and inductor-based EQ with selectable LF/MF frequencies and fixed 10kHz shelf.
• Upgraded Power & Headroom32V rails provide higher output before clipping compared to vintage Helios modules.
• Rugged, Reliable BuildSteel 19” rackmount chassis with Neutrik gold-plated XLR connectors for long-term durability.
• Premium ComponentsGold-plated ELMA rotary switches, gold toggle switches, and sealed conductive plastic pots throughout.

Tech Specs

• Format: 19” rackmount, 2U height
• Channels: 2 (dual mono or stereo pair)
• Mic Gain: 25–75 dB in 5 dB steps
• Input Pad: –20 dB
• Input: Line/Mic via Neutrik gold-plated XLR (female)
• Output: Transformer-balanced, Neutrik gold-plated XLR (male), 600 Ω drive, +25 dBm max
• EQ: 3-band, inductor-based (LF: 60–300 Hz boost / 50 Hz cut; MF: 0.7–6 kHz; HF: fixed 10 kHz shelf)
• High-Pass Filter: 0 Hz / 40 Hz / 80 Hz
• Phase Reverse: Yes
• Construction: Heavy-duty steel chassis
• Controls: ELMA gold rotary switches, gold toggle switches, sealed conductive plastic pots

Two channels. One classic rackmount powerhouse.
The H2 Audio 0011/Stereo delivers the legendary Helios sound in a rugged dual-channel format — the perfect front end for any serious studio.