The Zoom ZHA-4 Handy Headphone Amplifier is a compact, portable, 4-channel headphone amplifier specifically designed for mobile recording, podcasting, and field work. It’s built to allow up to four people to monitor the same audio signal simultaneously with independent level control.

Core Functionality

• 4 Independent Channels: Splits a single stereo audio input into four separate 1/8″ (3.5 mm) stereo headphone outputs.

• Individual Controls: Each of the four channels features its own volume control knob and a dedicated mute button, allowing each user to set their level and instantly mute their output without affecting the other listeners.

• High-Quality Audio: Provides a clean signal with high dynamic range (100dB) and a wide frequency response (10Hz-50kHz 1dB).

• Gain: Offers 24dB of gain to drive a variety of headphones.

Portability and Power

• Handy and Lightweight: The device is extremely compact and lightweight (approx. 180 / 6.3, making it ideal for tossing in a camera or recorder bag.

• Dual Power Options:

  • Battery Power: Operates on 2 AA batteries (Alkaline, NiMH, or Lithium) for true portability. Battery life is approximately 3.5 hours (Alkaline) to 4.5 hours (NiMH).

  • USB-C Power: Can be powered via the USB-C port from an external power bank or an AC adapter for longer sessions.

• Input/Output:

  • Input: 1 x 1/8” (3.5 mm) TRS unbalanced stereo input (for connecting to a recorder, phone, or mixer’s headphone out).

  • Outputs: 4 x 1/8” (3.5 mm) TRS unbalanced stereo headphone outputs.

    
    

The ZHA-4 is perfect for:

• Podcasting: Allowing hosts and guests to monitor levels during recording.

• Field Recording: Distributing the monitoring mix from a Zoom recorder (like the H or F series) to multiple crew members.

• Video Production: Providing monitoring feeds for a director, camera operator, and audio technician.

• Music Production: Allowing band members to monitor a mix from a DAW or interface during tracking.

  
  

It’s a strong, feature-packed option for anyone needing reliable, portable headphone distribution in a small footprint.