Interphase Audio Helium Pair
Interphase Audio Helium Pair gives you two Helium modules in one product box, so you get more control in one streamlined package.
Helium is a single-channel module with a 4-band Hybrid EQ. It combines capacitor-based EQ circuits and filters with inductor-based equaliser circuits, which helps create a rich and flexible sound shaping tool.
In addition, Helium brings together the strengths of our Carbon and Iridium EQ designs. We also added extra filter circuits, so you can shape audio with even more precision. The result is a full Class-A, discrete design built from carefully chosen and matched components. As a result, Helium delivers a highly musical response with strong character and clear detail.
Not a clone or a copy.
Interphase Audio does not build clones or copies of any product. Instead, we design original tools that focus on unique sound and practical control.
Helium also stands out for its straightforward operation. Each of the four bands offers wide, overlapping frequency ranges, so you can reduce problem areas or add extra presence where needed. Moreover, the HF and LF bands can work as bell-shaped EQ bands or as Hi-Cut and Lo-Cut filters. That flexibility makes Helium useful for both corrective work and creative tone shaping.
Each band provides up to 15 dB of cut or boost. Therefore, you can make subtle adjustments or push the sound much further when the mix calls for it. Helium Pair is a strong choice if you want musical EQ with a clear layout and dependable performance.
Specifications
• Input impedance: 30kohm
• Common mode rejection: 80dB
• Distortion: 0.001% (+4dBu output, 1kHz)
• Frequency response: 7Hz to 70kHz (-3dB)
• Boost / Cut range: +/-15dB (continuously variable)
• HF Frequency: 1.2 kHz – 22 kHz (continuously variable)
• HF Frequency switchable to 12 dB per octave sweepable Hi-Cut filter 1.2 kHz – 22 kHz
• HMF Frequency: 1.5, 3, 5 6, 7, 8 kHz (stepped)
• LMF Frequency: 125, 250, 500, 1k, 2k, 4k Hz (stepped)
• LF Frequency: 25 Hz – 440 Hz (continuously variable)
• LF Frequency switchable to 12 dB per octave sweepable Lo-Cut filter 25 Hz – 440 Hz
• Filter Q: 1.2 (just over 1 octave)
• Maximum input level (500 module): +28dBu
• Maximum input level (Octa module): +32dBu
• Maximum output level (500 module): +28dBu (10k load)
• Maximum output level (Octa module): +32dBu (10k load)
• Nominal input and output level: +4dBu (electronically balanced)
• Output impedance: 100 ohm
• Noise floor (typical, unweighted, EQ on): -80dBu
• Noise floor (unweighted, EQ off): -100dBu
• I/O connections (Rack XLRs): pin 2 +, pin 3 -, pin 1 ground
• Current requirement: 129mA (maximum) per rail
• Size and weight: Standard 500 Series, 0.7 kilos
Related products
Helium is available as 500 module or as Octa module, with Silver or Black faceplate.
