Hawk Ha4+ 4 Channel Headphone Amplifier

Hawk HA4+ 4-Channel Headphone Amplifier — One Input, Four Listeners, Zero Compromise

The Hawk HA4+ solves one of the most practical problems in studio, rehearsal, and live monitoring: distributing a single stereo mix to multiple headphones simultaneously, with each listener controlling their own volume independently. Compact, USB-powered, and built to last, it’s a piece of utility gear that earns its place permanently in any studio or stage setup.

Built for Studios, Stages, and Shared Listening

Splitting a headphone signal passively degrades audio quality and reduces volume. The HA4+ uses four independent high-power amplifier circuits — not a passive splitter — ensuring each of the four outputs receives a clean, full-level stereo signal that each listener can adjust without affecting the others.

What It Is

The Hawk HA4+ is a 4-channel stereo headphone amplifier that accepts a single stereo input and distributes it to four independent 6.35mm headphone outputs, each with its own dedicated level control. It is USB-powered for maximum flexibility and housed in a high-quality steel chassis for durability in professional environments.

Key Features

• 4 Independent Amplifier Sections — Each output has its own dedicated high-power amplifier circuit — not a passive split — so all four outputs receive the full signal at professional levels without interaction between channels.
• Individual Volume Controls Per Channel — Each of the four listeners can set their own headphone level without affecting anyone else’s mix — essential for ensemble rehearsals and overdub sessions where each player needs a custom monitor mix level.
• USB Powered — Powers from any USB source: phone chargers, power banks, wall adapters, or USB hubs. No proprietary power supply required, keeping the setup portable and adaptable.
• Steel Chassis Construction — Heavy-gauge steel housing provides durability against the impacts and vibrations of regular transport and studio rack environments.
• Universal Headphone Compatibility — The high-power output stage drives low and high impedance headphones reliably, from consumer earbuds to professional studio headphones.
• 1-Year Manufacturer Warranty — Hawk backs the HA4+ against manufacturing defects for a full year of professional use.

Why the HA4+ Stands Out

Passive headphone splitters are inexpensive but cut overall volume and can cause sonic interaction between channels. The HA4+ uses true amplified outputs — each channel gets the full signal at full power. The USB power design is a particularly practical advantage: it powers from any USB charger or power bank, making it genuinely portable for location recording, rehearsals, and live stage monitoring setups where rack-mount power is unavailable.

Perfect For

• Recording studios — multiple musicians monitoring simultaneously during tracking sessions, each controlling their own headphone level.
• Rehearsal and classroom settings — teachers and students sharing a mix with independent level control per student.
• Live stage monitoring — distributing an in-ear monitor mix to multiple performers from a single output with individual level control.

Best Suited For

Ideal for studio, rehearsal, educational, and live monitoring environments where 2–4 listeners need headphone access to a single stereo source with independent volume control per output.

Our Promise

All Hawk products at Pro Audio Video are genuine and backed by a 1-year manufacturer warranty. Our team is available to advise on compatible headphone types and audio routing configurations.

Frequently Asked Questions

Q: Can the HA4+ be powered from a laptop USB port?
A: Hawk specifies that the HA4+ should not be powered from a laptop or computer USB port — use a dedicated phone charger, wall adapter, or power bank for optimal performance.

Q: Does each channel get the full stereo signal?
A: Yes. Each of the four outputs receives the full stereo input signal, independently amplified by its own amplifier section.

Q: What impedance headphones does it support?
A: The HA4+ is compatible with standard consumer and professional headphones across common impedance ranges (16–600 ohms typical).

Technical Specifications