Samson QH4 - 4-Channel Stereo Headphone Amplifier with Balanced Inputs, Mono/Mute, and Aux In/Out

Samson QH4 - 4-Channel Stereo Headphone Amplifier with Balanced Inputs, Mono/Mute, and Aux In/Out

The Samson QH4 4-Channel Mini Headphone Amp is a 4-channel headphone amplifier/distributor for the studio, podcasting, classrooms, and rehearsal rooms. It powers up to four pairs of headphones with independent volume control and no loss of performance, even with all channels active. Its signal path offers an ultra-low noise floor and wide dynamic range , with balanced 1/4" TRS inputs (L/R) and 3.5mm stereo Aux In/Out for daisy-chaining multiple units or integrating auxiliary sources. It includes Master Volume , Master Mute , and a MONO switch for quickly checking mono compatibility or doubling L/R signals in headphones. It supports headphones from 16 Ω to 600 Ω , and is powered by the included 15 V DC adapter .

Main features

• Distribution to 4 headphone outputs ( 1/4" TRS ), each with its dedicated volume .
• Balanced main inputs 2 × 1/4" (L/R) and stereo Aux In 3.5 mm .
• Aux Out 3.5mm for daisy chaining (chaining multiple QH4s) or sending to monitors/rec.
• Global controls : Master Volume , Master Mute and MONO (sum L+R).
• Wide charging compatibility : 16–600 Ω headphones.
• Powerful and clean output : up to 282 mW per channel (@32 Ω, 0.5% THD).
• Flat frequency response 20 Hz–20 kHz (±0.5 dB); headphones 20 Hz–20 kHz (−1 dB @32 Ω).
• Noise floor −114 dBu (22 kHz, unweighted) and SNR 96 dB (ref. 1 mW/32 Ω).
• Compact desktop design (124 × 124 × 40 mm) and weight 0.40 kg .

Product benefits

• Consistent headphone mixes for up to four performers, without fighting over volume.
• Flexible integration : balanced inputs for your interface/mixer and Aux for players or returns.
• Instant Master Control : Mute everything or check Mono compatibility instantly.
• Scalability : chain multiple QH4s per Aux Out for larger setups without the hassle.
• Universal compatibility with low/high impedance studio or in-ear headphones.

Use cases

• Studio and home-studio : independent cue mixes for vocalist, guitarist, keyboardist and producer.
• Podcast and content creation : four guests with individual level control.
• Education and rehearsal : silent practice and classroom monitoring stations.

Frequently Asked Questions

• Can I sum a stereo source to mono? Yes. The MONO switch sums L+R to both ears.
• Does power degrade when using all four outputs? No, performance is maintained with all outputs active.
• What's included in the power supply? 15V DC adapter (center positive) for immediate use.

Description for projects

Samson QH4 4-channel headphone amplifier: 2 × balanced 1/4" TRS and 3.5 mm Aux In inputs; 4 × 1/4" TRS headphones and 3.5 mm Aux Out outputs; Master Volume , Master Mute , MONO and 4 channel volume controls; max. power 282 mW/channel @32 Ω; response 20 Hz–20 kHz (±0.5 dB); SNR 96 dB; noise floor −114 dBu (22 kHz); load 16–600 Ω; power supply 15 V DC 800 mA (center positive); dimensions 124 × 124 × 40 mm; weight 0.40 kg.