Cranborne Audio N22H Reference-Grade Headphone Amplifier

The Cranborne Audio N22H is a reference-grade headphone amplifier and C.A.S.T. breakout box designed for the studio and the stage. Featuring ultra-low distortion, massive clean headroom, and flexible power options, N22H delivers mastering-quality monitoring for any set of headphones. With C.A.S.T. connectivity, rugged build quality, and switchable power modes, N22H ensures uncompromised performance whether you’re mixing, tracking, or taking it on the road.

Key Features

• Reference-Grade Headphone Amp — ultra-low distortion (THD+N <0.0009%), flat frequency response from 0.8 Hz to >200 kHz, and vanishingly low output impedance (0.33 Ω).
• High Power Mode — delivers up to 950 mW per channel @ 100 Ω for high-impedance, open-back, and mastering headphones.
• Low Power Mode — optimised for efficiency and up to 10 hours of operation with in-ears and closed-back tracking headphones.
• Dual Inputs/Outputs — 2 × balanced combi jack inputs, 2 × balanced XLR, and 2 × 1/4” jack outputs.
• Flexible Power — runs on included 9 V DC power supply, any centre-negative pedal PSU, or a 9 V battery for remote operation.
• C.A.S.T. Integration — Cat 5 I/O for connecting to 500R8/500ADAT, or use with N22/N22H as a Cat 5 snake replacement up to 330 ft (100 m).
• Tour-Ready Construction — steel chassis, non-slip rubber feet, cable-tie management holes, fixing points, and a 3/8” mic stand mount.

Specifications

• General
  • Inputs: 2 × balanced combi jacks
  • Outputs: 2 × balanced XLR and 1/4” jacks
  • C.A.S.T. I/O: IN (RRTT), OUT (TTRR) via Cat 5e/6/7
  • Input Impedance: 44 kΩ
  • Output Impedance: 0.33 Ω (High Power), 1 Ω (Low Power)
  • Max Input Level: +28 dBu (High Power), +21.7 dBu (Low Power)
• Performance
  • Frequency Response: -1 dB, <0.8 Hz to >200 kHz
  • THD+N: <0.0009% @ +6 dBu, 1 kHz, 100 kΩ load
  • Dynamic Range: up to 116.5 dB A-weighted
  • Noise Floor: as low as -100 dBu A-weighted
• Output Power
  • High Power Mode: 252 mW ×2 @ 600 Ω; 502 mW ×2 @ 300 Ω; 950 mW ×2 @ 100 Ω; 470 mW ×2 @ 32 Ω
  • Low Power Mode: 46 mW ×2 @ 600 Ω; 73 mW ×2 @ 300 Ω; 112 mW ×2 @ 100 Ω; 71 mW ×2 @ 32 Ω
• Power
  • Included PSU: 9 V DC, 500 mA, centre negative
  • 3rd Party PSU: 9 V DC, 1000 mA, centre negative
  • Battery: 9 V, ~2 h life (High Power), ~10 h life (Low Power)
• Dimensions & Weight
  • Unit: 5.9″ W × 2.2″ H × 4.7″ D
  • Unit Weight: 2 lb
  • Shipping Carton: 9.8″ W × 4.7″ H × 7.9″ D
  • Shipping Weight: 3.1 lb
• Environmental
  • Operating Temperature: +1 to 35 °C
  • Storage Temperature: -20 to 50 °C
• Notes: Specifications typical unless otherwise stated. Tested with Audio Precision APx555.