KLH AUDIO - Ultimate One Headphones - Zebrawood

Open-back beryllium sound in real wood

The KLH Ultimate One Headphones (Zebrawood) are a premium over-ear, open-back dynamic design built for true high-fidelity stereo listening. A 50mm pure beryllium driver sits inside real wood earcups, while lambskin and cowhide leather over dual-layer memory foam keep long sessions comfortable. They run from any 3.5mm source and include a 1/4" adapter for full-size headphone amps.

Why You'll Love It

• Pure beryllium drivers. A 50mm pure beryllium driver in each earcup delivers fast, detailed high-fidelity sound across an 18 Hz to 22 kHz range.
• Made for long listening. Lambskin and cowhide leather over dual-layer memory foam, at a light 340 grams, keeps them comfortable session after session.
• Real wood, real kit. Genuine wood earcups add character, and the set ships with a hard leather case, a soft velour bag and a detachable silver-litz cable.

Under the Hood

• Open-back over-ear design. A 32 Ω impedance and 97 dB sensitivity make them easy to drive from phones, DACs or dedicated headphone amps.
• Wide, even response. Frequency response runs 18 Hz to 22 kHz ±3 dB with a maximum SPL of 108 dB.
• Detachable silver-litz cable. A 2 metre detachable 3.5mm pure silver-litz braided cable connects to any source, with a 1/4" adapter included.

CHT Insider Verdict

The Ultimate One punches well above its price for anyone chasing an open, spacious sound with a bit of luxury in the materials. The beryllium driver keeps detail tight, and the leather-and-wood build feels far dearer than it is. Just remember that open-back headphones leak sound in both directions.

Pro Tip: Because the design is open-back, use them in a quiet room where the sound leak will not bother anyone nearby, and keep the detachable cable as an easy future swap if it ever wears.