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KLH Ultimate One

Open-back over-ear headphones (Zebrawood)

Item # 405ULTONEZ

KLH's Ultimate One headphones feature real wood earcups and pure beryllium drivers — materials that are...

KLH's Ultimate One headphones feature real wood earcups and pure beryllium drivers — materials that are...

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Contact our Virginia-based experts.

Item # 405ULTONEZ

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About the KLH Ultimate One

A head-turning combination

KLH's Ultimate One headphones feature real wood earcups and pure beryllium drivers — materials that are surprising to find in headphones at this price. I recently got my hands on a pair and had a chance to spend a few hours checking them out.

A head-turning combination

KLH Ultimate One headphones

KLH's Ultimate One headphones feature gorgeous real wood earcups.

KLH's Ultimate One headphones feature real wood earcups and pure beryllium drivers — materials that are surprising to find in headphones at this price. I recently got my hands on a pair and had a chance to spend a few hours checking them out.

Upscale fit and finish

These headphones make a strong visual impression as soon as you pull them out of the included zippered hardshell case. The figuring in the wood is gorgeous, and yet the overall design is understated. The breathable leather ear pads and headband made for a comfortable few hours of listening. The materials and construction reminded me of some much higher-priced headphones from other manufacturers that I've tested out recently. The Ultimate One's fit is secure and somewhat snug, in a good way. I never felt any discomfort or pressure, even wearing eyeglasses.

A lively sound profile

The longer I listened to these headphones, the more I liked them. There's plenty of energy at the bass and treble ends of the frequency spectrum. My trusty AudioQuest DragonFly Black USB headphone amp/DAC provided plenty of volume and detail as I surfed through a YouTube mix of familiar tracks.

The headphones' open-back design makes for a slightly more spacious presentation than you usually get with closed-back models. On a live version of modern progressive rocker Steven Wilson's "Luminol," the soundstage was wide enough to lend an in-concert feel. The detail of the cymbal work came through crisply, the high-speed kick drum patterns were distinct and solid, and the bass and rhythm guitars were textured and punchy.

I also gave these headphones a test drive (or three) with my Sony NW-WM1A high-res portable music player. The bass was deep and clear (but not overwhelming) throughout the Geogaddi album from electronica duo Boards of Canada. On a high-resolution DSD version of Los Lobos's Kiko, I felt like the soundstage really opened up, and instrumental and vocal parts were placed in a three-dimensional space around me.

As with all open-back headphones, some sound leaks out. But my nearest office neighbor told me he couldn't hear anything. (That same office mate has occasionally been known to ID my headphone song choices with some other open-back models.)

Bottom line: this is a lot of headphone for the money, and I'm looking forward to playing with them some more.

From the AVS Forum review

”These headphones are in the 'Goldilocks Zone' in terms of performance, aesthetics, price, and even weight. The KLH Ultimate One design is timeless, there's nothing of note to improve upon in terms of ergonomics or fit, no gimmick that's going to replace the acoustic benefit of open-back headphones with beryllium drivers.”

Posted by Mark Henninger – AVS Forum on May 30th, 2019


Product highlights:

  • over-the-ear, open-back headphones
  • real zebrawood earcups
  • 50mm pure beryllium drivers
  • 6-1/2-foot single-sided 3.5mm cable included
  • 1/4" adapter included
  • hard case and carrying bag included
  • frequency response: 18-22,000 Hz
  • sensitivity: 97 dB
  • impedance: 32 ohms
  • weight: 12.1 oz.
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # KLHF00046

What's in the box:

  • Over-ear headphones (Zebra Wood)
  • 6.5' Audio cable (threaded 3.5mm plug)
  • 3.5mm-to-1/4" Adapter
  • Soft cloth storage pouch
  • Hard-shell zippered case
  • Manual

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Crutchfield response

<< >>

More details on the KLH Ultimate One

Mark G.

Features & specs

Fit Style Over-the-ear
Earcup Type Open
Earcup Width x Height 3.678" x 3.678"
Noise-canceling No
Bluetooth No
Bluetooth Version N/A
Single-earbud Operation ---
Mic For Taking Calls ---
Voice Assistant Access
Amazon Alexa No
Google Assistant No
Siri No
3.5mm Yes
1/4" Yes
Lightning No
4.4mm balanced No
XLR4 balanced No
2.5mm No
Other None
Frequency Response 18-22k Hz
Sensitivity 97 dB
Impedance 32 Ohms
Weight 13.3 ounces
Cord Length 78"
Parts Warranty 2 Years
Labor Warranty 2 Years
The KLH Ultimate One replaces these items:

Product Research


Overview: The Ultimate One over-ear headphones is the first model from KLH Audio's Ultimate Series of headphones. The headphones feature real wood ear cups and leather ear pads and headband. The large 50mm drivers deliver a high quality musical response over a wide frequency range. The Ultimate One comes with a detachable fiber-covered straight cord, gold-plated connectors and adapter, a soft fabric pouch and a leather-bound hard, zippered storage case.

Drivers: The Ultimate One headphones are equipped with a pair of 50mm full-range Pure Beryllium drivers. The open-back wood ear cups provide a natural open soundfield.

Premium Materials: The Ultimate One over-ear headphones feature solid real Zebra Wood ear cups. The headband and ear pads are made with genuine cowhide leather on the outer surfaces and soft, supple sheepskin on the inside. The genuine hand-stitched cowhide headband sits gently on top of your head, providing a solid foundation.

Cable: The KLH Ultimate One headphones come with a detachable 6.5' pure silver-litz cable with a braided nylon jacket. The cable terminates into 3.5mm plugs on each end. At the source end, the 3.5mm plug is threaded to accommodate the supplied 1/4" adapter.

Storage Options: The headphones include a soft cloth storage pouch with a drawstring closure, as well as a leather-covered, zippered hardshell case. The headphones fold flat for compact storage.


  • Frequency Response: 18 Hz - 22 kHz (-3dB)
  • Sensitivity (1 mW): 97 dB
  • Impedance: 32 ohms
  • Maximum SPL: 108 dB SPL
  • Maximum Input Power: 1800mW
  • Ear Cup Dimensions: Diameter 3.678", Depth 2.129"
  • Weight: 12.4 ounces (13.3 ounces with cable)

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