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Signature HP100 SE

Driver
Dynamic
Enclosure
Open-back
Weight
520 g
List
$2,495
Loading the model

Grado's flagship, made for Joseph Grado's 100th birthday and hand-assembled in Brooklyn. It is the first Grado with a detachable cable, and its 52 mm drivers are matched to within 0.04 dB.

Where to buy

List $2,495

Retailer prices checked 2026-10-21. We may earn a commission on purchases. How this works

Title block

Maker
Grado
Model
Signature HP100 SE
Made in
United States
Released
2024
Transducer
Dynamic
Enclosure
Open-back
Driver
52 mm
Weight
520 g
Impedance
38 ohms
Sensitivity
117 dB SPL @ 1 mW
Frequency response
3.5 Hz – 51.5 kHz
List price
$2,495 USD

Drive requirements

Match an amplifier in the synergy calculator
LevelPowerVoltageCurrent
100 dB0.02 mW0.03 V0.72 mA
110 dB0.20 mW0.09 V2.29 mA
120 dB2.00 mW0.28 V7.25 mA

Most headroom at 110 dB

Rated 117 dB/mW into 38 ohms. Estimated from published amplifier output.

Assembly drawing

1234567

Parts

  1. 1HeadbandStainless steel band, white-stitched leather strap, 50% more padding
  2. 2YokeEngraved aluminum alloy gimbals, stainless steel height rods, zinc alloy end caps
  3. 3GrilleNot published
  4. 4Ear cupHand-machined aluminum housing, space grey finish
  5. 5MagnetHigh-flux rare-earth alloy magnetic circuit
  6. 6DiaphragmPaper composite cone; copper-plated aluminum voice coil
  7. 7EarpadsG cushions installed, F-style cushions included; cover material not published

Schematic dynamic assembly, annotated with the Grado Signature HP100 SE’s published materials. Not to scale.

Engineering notes

  • First Grado model with a detachable cable (12-conductor, 4-pin mini XLR at each housing)
  • New 52 mm dynamic driver: paper composite cone, high-flux rare-earth magnetic circuit, lightweight copper-plated aluminum voice coil; drivers matched to 0.04 dB
  • Housings individually machined from specially treated aluminum with engraved product name
  • Hand assembled at Grado's Brooklyn, New York headquarters

Design language

Grado's open-air look in space grey aluminium, with engraved gimbals and a white-stitched leather strap.

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