H2 Audio 5011 500 Series 3-Band Helios EQ

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

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

Build Quality

- Gold plated audio toggle switches

- High-quality, ELMA gold plated rotary switches.

- Sealed, conductive plastic element pots