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Grado Signature HP100 SE specifications and in-depth review

Grado Signature HP100 SE

Manufacturer: Grado

The Grado Signature HP100 SE is a wired over-ear headphone built around an open-back design, a configuration that Grado has long favored for its characteristic acoustic presentation. The headphone ships with a tangle-free, detachable cable, which adds a degree of practicality for everyday use and long-term maintenance. It is not designed for portability — there is no folding mechanism and no included travel bag — which signals its orientation toward stationary, attentive listening.

On the technical side, the HP100 SE is driven by a 52 mm driver unit with an impedance of 38 Ohms, making it reasonably accessible to a range of source devices without requiring high-output amplification. The frequency response extends from 3.5 Hz down to a notably high ceiling of 51,500 Hz, and the sound pressure level is rated at 117 dB/mW. The headphone operates entirely in the analog wired domain, with no active noise cancellation, no wireless connectivity, no microphone, and no USB Type-C port — keeping the signal path straightforward and focused solely on passive audio reproduction.

Pros
  • The detachable cable makes it easy to replace or swap without affecting the headphone itself
  • A tangle-free cable reduces frustration during setup and everyday use
  • The open-back design allows sound to pass naturally through the ear cups, which suits extended stationary listening sessions
  • The wide frequency range, stretching from 3.5 Hz to 51,500 Hz, covers well beyond the standard audible spectrum
  • At 38 Ohms impedance, the headphone can be driven without requiring specialized high-output amplification
  • The 52 mm driver unit is notably large for a headphone, which supports detailed sound reproduction across the frequency range
Cons
  • The open-back design offers no passive noise isolation, making the headphone unsuitable for use in noisy environments
  • No water resistance means it cannot be used in wet or outdoor conditions with any confidence
  • The lack of a folding mechanism and absent travel bag make it impractical to transport
  • There is no microphone or in-line control panel, so it cannot be used for calls or hands-free communication
  • The absence of in/on-ear detection means there is no automatic pause when the headphone is removed
  • No ambient sound mode is available for users who need situational awareness while listening
Who is this for?

This headphone is well suited to stationary, attentive listening sessions at a desk or in a quiet room, where the open-back design can perform without the drawbacks of environmental noise being a concern. Its wide frequency response and large 52 mm driver make it a reasonable fit for listeners who prioritize a broad, detailed sound reproduction across the audible range. The detachable, tangle-free cable also appeals to users who value easy maintenance and clean cable management in a fixed home or studio listening setup.

Who is this NOT for?

This headphone is not a practical choice for commuters or users in noisy environments, as the open-back design provides no passive noise isolation whatsoever, leaving the listener fully exposed to surrounding sounds. Those who need to take calls, join video meetings, or use voice communication will find it inadequate, since it carries no microphone and cannot function as a headset. It is equally unsuitable for outdoor or travel use, given the complete absence of water resistance, a folding mechanism, or an included carrying case.

Design:

Fit Over-ear
has a detachable cable ✓
water resistance None
can be folded ✕
is designed for kids ✕
has a tangle free cable ✓
travel bag is included ✕
has an open-back design ✓
has stereo speakers ✓

The Grado Signature HP100 SE uses an over-ear fit and features an open-back design, along with stereo speakers for a standard two-channel listening experience. It comes equipped with a detachable, tangle-free cable, which aids both usability and cable management over time. The headphone cannot be folded and does not include a travel bag, reflecting its intent as a home or desk-based device rather than a portable one. It carries no water resistance rating and is not designed for use by children.

Sound quality:

has active noise cancellation (ANC) ✕
lowest frequency 3.5 Hz
highest frequency 51500 Hz
driver unit size 52 mm
impedance 38 Ohms
supports spatial audio ✕
sound pressure level 117 dB/mW
has a neodymium magnet ✕
has passive noise reduction ✕

The Grado Signature HP100 SE uses a 52 mm driver unit with an impedance of 38 Ohms and a sound pressure level of 117 dB/mW. Its frequency response spans from 3.5 Hz to 51,500 Hz, covering a wide range across the audible spectrum and beyond. The driver does not use a neodymium magnet, and the headphone includes neither active noise cancellation nor passive noise isolation, meaning external sounds will pass through during use. Spatial audio is also not supported.

Power:

Has USB Type-C ✕

Connectivity:

connectivity Wired

The Grado Signature HP100 SE connects via a wired connection, with no wireless or Bluetooth option available.

Features:

has a noise-canceling microphone ✕
has ambient sound mode ✕
has in/on-ear detection ✕
number of microphones 0
control panel placed on a device ✕
can be used as a headset ✕
Has an in-line control panel ✕

The Grado Signature HP100 SE is focused purely on audio playback and includes no microphones, meaning it cannot be used as a headset and does not support voice calls or communication. There is no in-line control panel or device-mounted control panel, so playback management must be handled directly at the source. The headphone also lacks ambient sound mode and in/on-ear detection, and there is no automatic pause functionality when the headphones are removed.

Final Verdict

The Grado Signature HP100 SE is a purpose-built, wired over-ear headphone that makes no attempt to be an all-rounder. Its open-back design paired with a wide-ranging 52 mm driver reflects a clear commitment to passive, unprocessed audio listening in a controlled environment. There are no wireless features, no microphone, no noise cancellation, and no concessions to portability — all of which reinforce that this headphone is engineered for a specific, focused use case. Listeners who value a clean analog signal path and wide frequency coverage in a quiet, stationary setting will find it a coherent and well-defined option; those seeking versatility for travel, communication, or noisy surroundings will need to look elsewhere.