The SA-4HP headphone amplifier delivers clean, powerful distribution for recording studios, rehearsal spaces, and live monitoring setups where multiple performers need individual headphone feeds. This compact 4-channel unit transforms a single stereo source into four independent headphone outputs, each with dedicated volume control.

Built around a high-performance amplifier circuit, the SA-4HP handles input levels up to +22dB while maintaining exceptional signal clarity with less than 0.01% total harmonic distortion. The 20Hz-20kHz frequency response ensures accurate reproduction across the entire audible spectrum, while the >98dB signal-to-noise ratio keeps background noise minimal even at higher volumes.

Input impedance of 22K ohms accommodates virtually any stereo source, from mixing consoles to audio interfaces, while the minimum 16-ohm output impedance drives most professional and consumer headphones effectively. Each channel delivers up to 20dB of gain, providing ample headroom for quiet sources or low-sensitivity headphones. The rugged metal housing withstands daily studio and stage use.

Perfect for band rehearsals, podcast recording, drum practice with backing tracks, or any scenario where multiple people need to monitor the same audio source simultaneously. The compact 4" x 2.25" x 1.25" footprint fits easily on desktop surfaces or in equipment racks.

Connection is straightforward: plug your stereo source into the 1/4-inch TRS input, connect headphones to any of the four 1/4-inch TRS outputs, and power up with the included 12V adapter. Ships with full warranty coverage and fast delivery direct from Seismic Audio.

Technical Specifications

Frequently Asked Questions

What types of headphones work with the SA-4HP?

The SA-4HP works with any headphones that have 16 ohms impedance or higher, which includes virtually all professional studio headphones and most consumer models. The unit provides up to 20dB of gain per channel, so it can drive both high-impedance studio headphones and lower-impedance consumer headphones effectively. Always use stereo (TRS) headphone cables, not mono cables, to avoid potential damage to the unit.

Can I use this for a 4-person podcast recording setup?

Yes, the SA-4HP works perfectly for podcast recording where multiple hosts need to monitor the same mix or playback audio. Connect your audio interface or mixer's headphone output to the SA-4HP input, then each host gets their own volume control for comfort. This setup works well in home studios or small recording spaces where individual headphone control improves the recording experience.

How do I connect the SA-4HP to my mixing board or audio interface?

Connect a standard 1/4-inch TRS (stereo) cable from your mixer's headphone output or aux send to the SA-4HP's input jack. If your source only has a 1/8-inch (3.5mm) output, use a 1/8-inch to 1/4-inch adapter. Each headphone connects to the SA-4HP with its own 1/4-inch TRS cable. The unit includes the 12V power adapter, so you only need the audio cables.

Will this work for band rehearsal where everyone needs to hear a click track?

Absolutely. The SA-4HP is ideal for band rehearsals where multiple musicians need to monitor a click track, backing tracks, or a rough mix. Connect your playback device or mixer output to the SA-4HP, and each band member gets independent volume control for their headphones. The low noise floor and wide frequency response ensure everyone hears the timing reference clearly without interference.

What's the difference between this and just using a headphone splitter?

Unlike passive splitters that reduce volume and can cause impedance issues, the SA-4HP actively amplifies the signal to maintain proper levels across all four outputs. Each channel has its own volume control, so one person can listen quietly while another needs more volume. The amplified design also prevents the loading issues that occur when multiple headphones share a single passive output, ensuring consistent sound quality for everyone.

WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer. For more information, go to: www.P65Warnings.ca.gov