5011 500 Series 3-Band Helios EQ

Add vintage Helios flavor to your 500-series setup.

Whether you're sculpting drums, guitars, or entire mixes, the 5011 brings a timeless analog groove to your workflow.

Bring the rich musical character of Helios consoles into your 500 series lunchbox or rack. The H2 Audio 5011 faithfully mirrors the EQ section from the legendary 0011 module, delivering the same soulful, punchy tone that defined British rock in the '60s and '70s—but in a nimble 500-series form. With its warm midrange, smooth shelving, and authentic analog feel, the 5011 adds vintage presence and clarity without compromising modern studio efficiency. Designed for tracking or mixing, it’s EQ with heritage turned compact.

What Makes It Legendary 

• Authentic Helios EQ Circuit
  The 5011 uses the exact same inductor-based 3-band EQ design found in the original 0011 Helios module.
• Balanced I/O with Output Amp
  Features electronically balanced input and transformer-balanced output with built-in amp circuitry for authentic tone and robust signal integrity. 
• Frequency Bands and Controls
• High Band: 10 kHz shelf, ±10 dB boost/cut
• Mid Band: Selectable peaking frequencies from 0.7–6 kHz, with musical boost (up to +16 dB) and cut (up to –17.5 dB)
• Bass Band: Boosts at 60, 100, 200, 300 Hz up to +15 dB, or cuts at 50 Hz between –3 dB to –15 dB
• Bypass Capability
  Easily compare EQ’d signal vs. unaltered source to dial in precision tone shaping

Quick Specs

• Input: Electronically balanced (15 kΩ)
• Output: Transformer-balanced, with amp stage
• High Band: 10 kHz shelf, ±10 dB
• Mid Band Frequencies: 0.7, 1, 1.4, 2, 2.8, 3.5, 4.5, 6 kHz (peaking)
• Mid Gain Range: +16 / –17.5 dB
• Bass Band: Boost at 60–300 Hz (up to +15 dB); cut at 50 Hz (–3 to –15 dB)
• Bypass: Yes
• Format: Single-slot 500-series module