Stagg SIA-ST 4-Channel Stereo Headphone Amplifier

The Stagg SIA-ST stands out in the crowded headphone amplifier market by delivering four independent stereo outputs with individual volume controls, all housed in a rugged metal chassis. Unlike many budget headphone amps that sacrifice build quality or channel isolation, this unit offers a practical solution for multi-listener monitoring in studios, rehearsal spaces, or home setups where clarity and reliability are paramount.

Highlights

• Four stereo headphone outputs, each with its own volume knob
• Single 1/4" TRS stereo input for easy connection to mixers or interfaces
• Robust metal housing built to withstand daily use
• Low distortion and high signal-to-noise ratio for clean monitoring
• Includes 12V DC power adapter for immediate operation

In daily use

Whether you're tracking a band, hosting a listening session, or simply need multiple headphone feeds from one source, the SIA-ST simplifies your workflow. Connect your mixer's headphone output or a dedicated monitor send to the single stereo input, then distribute the signal to up to four headphones. Each listener can adjust their own level without affecting others, thanks to the dedicated per-channel volume controls. The master volume provides overall control, while the power LED confirms operation at a glance. The metal chassis not only protects the internal circuitry but also helps reduce interference, ensuring a clean signal path.

Full specifications

• Number of channels: 4 (stereo)
• Input: 1x 1/4" TRS stereo jack
• Outputs: 4x 1/4" TRS stereo jacks
• Individual volume control per channel: Yes
• Master volume control: Yes
• Input impedance: 10 kOhm
• Output impedance: 100 Ohm
• Frequency response: 20 Hz - 20 kHz
• Signal-to-noise ratio: > 98 dB
• Total harmonic distortion: < 0.01%
• Power supply: DC 12V (adapter included)
• Power consumption: 150 mA
• Housing material: Metal
• LED indicator: Power
• Application: Studio, stage, home monitoring

Final note

The Stagg SIA-ST is a dependable, no-nonsense headphone amplifier that does exactly what it promises: clean, multi-output monitoring with individual control, all in a durable package. It's an excellent value for anyone needing to expand their headphone distribution without compromising audio quality.