The concert hall,
on your head.

The first headphones where music finally sounds like itself.

Today's headphone drivers can match, and often beat, loudspeakers on sound pressure, frequency range, phase linearity and impulse response. But the classic one-driver-per-ear layout keeps the left and right channels fully separated.

On a normal stereo recording, that design pulls the soundstage inside your head instead of placing it in front of you, the way a well set-up pair of speakers does in a treated room. TSL fixes this acoustically, so you get a real stage on any track, anywhere.

Proven in the listening room.

To prove the idea works, we built a full prototype from off-the-shelf parts: a standard headband, ear pads and budget-grade 40 mm drivers. The waveguide combiner was 3D printed in photopolymer, and the correction circuits were made adjustable so we could tune them by ear.

We tested it on a stationary hi-fi setup (Quad Artera Solus and Rega Io amplifiers, Primare SC-15 source and DAC) as well as from regular desktop and laptop sound cards. In every session the DDTS prototype clearly beat traditional headphones.

• A real soundstage built in front of the listener
• Sharper separation and placement of individual instruments
• More emotional engagement and less fatigue over long sessions
• Works equally well on CD, hi-res, DSD and low-bitrate streaming