Palma DHS-10 and DHS-1 headphones offer a convertible open-to-closed acoustic design

The Palma DHS-10 and DHS-1 headphones feature a unique, user-adjustable acoustic chamber that allows for a physical transition between open-back and closed-back operation. By rotating the cup housing or faceplate, users can engage or disengage internal damping material, effectively altering the sound signature. While the treble response remains consistent across both modes, the open configuration provides a warmer sound with increased bass and midrange presence, whereas the closed mode offers a leaner, more analytical profile. Despite this versatility, the headphones do not achieve the full isolation typical of dedicated closed-back models, functioning more as a restricted open-back design. The DHS-1, priced at $2,495, features a wooden chassis and 2.5mm connectors, while the $1,895 DHS-10 utilizes a composite material and standard 3.5mm connectors. Both models share identical drivers and headbands, though the DHS-10’s yoke design can create uneven pressure distribution, complicating the achievement of an optimal seal. Ultimately, while the convertible feature is technically innovative, the headphones' high price point and performance limitations suggest they may not be the most cost-effective choice compared to established alternatives.

Tech4K Staff15:23 watch

The Palma DHS-10 and DHS-1 headphones feature a unique, user-adjustable acoustic chamber that allows for a physical transition between open-back and closed-back operation. By rotating the cup housing or faceplate, users can engage or disengage internal damping material, effectively altering the sound signature. While the treble response remains consistent across both modes, the open configuration provides a warmer sound with increased bass and midrange presence, whereas the closed mode offers a leaner, more analytical profile. Despite this versatility, the headphones do not achieve the full isolation typical of dedicated closed-back models, functioning more as a restricted open-back design. The DHS-1, priced at $2,495, features a wooden chassis and 2.5mm connectors, while the $1,895 DHS-10 utilizes a composite material and standard 3.5mm connectors. Both models share identical drivers and headbands, though the DHS-10’s yoke design can create uneven pressure distribution, complicating the achievement of an optimal seal. Ultimately, while the convertible feature is technically innovative, the headphones' high price point and performance limitations suggest they may not be the most cost-effective choice compared to established alternatives.

The Palma DHS-10 and DHS-1 headphones allow users to switch between open and closed acoustic modes by rotating the cup housing or faceplate. The open-back mode provides a warmer sound profile with increased bass and midrange, while the closed mode is leaner and more analytical.

The treble response remains largely consistent regardless of whether the headphones are in open or closed mode. The DHS-1 is the more expensive model, featuring a wooden chassis and 2.5mm connectors, while the DHS-10 uses composite materials and 3.5mm connectors.

The headphones do not provide the same level of isolation as dedicated closed-back models, functioning instead as a restricted open-back design. The headband and yoke design on the DHS-10 can lead to uneven pressure, which may affect the acoustic seal and overall sound quality.

Chapter guide

Introduction to open vs. closed-back headphonesAn overview of the differences between open and closed-back headphones and the introduction of the Palma DHS-10 and DHS-1.Build and design differencesA comparison of the construction materials, including the wooden chassis of the DHS-1 and the composite material of the DHS-10.Comfort and ergonomicsAn analysis of the headband, yoke, and pad design, including issues with pressure distribution and the lack of swivel.Connector typesA discussion on the use of 3.5mm connectors on the DHS-10 versus the 2.5mm connectors on the DHS-1.The convertible acoustic mechanismA demonstration of how the rotating cup housing and faceplate mechanism works to change the acoustic profile.Sound performance and measurementsA detailed look at the frequency response measurements for both models in open and closed modes.Final verdict and recommendationsA summary of the reviewer's thoughts on whether the headphones are worth their price point compared to other options.

Worth noting

  • The reviewer notes that the acoustic seal and sound quality are highly dependent on the individual user's head shape and fit.
  • The reviewer mentions that the DHS-10 unit tested had potential issues with the headband or yoke mounting that caused uneven pressure.

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