A headphone amplifier sits between your interface and your headphones, supplying clean gain and current to drive power-hungry cans properly. Most interfaces have a headphone jack built in, but it’s often an afterthought: underpowered, or unable to push demanding headphones without strain. The Behringer HA400 Powerplay is the amp most small studios reach for first, mainly because it solves the problem cheaply: four independent headphone outputs, each with its own volume knob, fed from a single stereo source.
The HA400’s real value shows up the moment more than one person needs to monitor at once. Instead of splitting a single weak headphone jack two or three ways and losing level for everyone, each output on the HA400 gets its own independent gain, so an engineer and a performer can each set their own level without fighting over one jack. It won’t turn a demanding reference pair into an audiophile rig, but for driving typical studio headphones cleanly across several outputs, it’s a dependable, low-drama choice that’s been a fixture in home studios for years.
- Output power and impedance matching — the HA400 comfortably drives typical studio headphones, though very high-impedance pairs may want a dedicated single-channel amp.
- Four outputs with independent level controls, useful the moment more than one person monitors at a time.
- Simple, unbalanced stereo input, so it slots in after almost any interface or mixer.
- Built for utility rather than hi-fi flourish — it’s a workhorse, not a boutique amp.
A headphone amp like the HA400 earns its keep in any studio running multi-person tracking sessions, or where the interface’s headphone output is the weak link. A single casual listener rarely needs one, but as soon as more than one person monitors, a dedicated amp stops being a luxury. Browse the full shortlist of headphone amplifiers we recommend.
