Honouring Grado’s rich legacy, the HP100 SE delivers a contemporary take on an iconic headphone. Built with newly engineered drivers, detachable cables, and a redesigned headband assembly, every element has been thoughtfully refreshed.

Grado Signature HP100 SE Headphones:

Type:
Open-Air Dynamic Headphones

Driver:
Transducer Type: Dynamic
Operating Principle: Open Air
Driver Size: 52 mm
Driver Matched dB: 0.4 dB (or 0.04 dB per some sources) 
Cone Material: Paper composite
Voice Coil: Lightweight copper-plated aluminum
Magnetic Circuit: High-flux, rare earth alloy (neodymium-iron-boron)

Performance:
Frequency Response: 3.5 Hz – 51.5 kHz 
Total Harmonic Distortion (THD): <0.1% @ 100 dB 
Sound Pressure Level (SPL): 117 dB (at 1 mW) 
Nominal Impedance: 38 ohms 

Cable:
Cable Type: 12-conductor detachable, braided finish
Cable Length: 6 ft / 1.8 m
Headphone Connection: 4-pin Mini XLR (left and right, with black/red sheaths) 
Source Connection: 6.3 mm (1/4") straight plug 
Additional Options: Balanced cables (4-pin XLR, 4.4 mm) and various lengths available separately 

Earpads:
Type: G-cushions (installed), includes additional F-cushions for on-ear fit 
Fit Style: Over-ear (circum-aural)

Headband:
Construction: Stainless steel band, aluminum alloy gimbals, height rods 
Padding: 50% more padding than previous Grado designs 
Earcup Rotation: Limited to 105 degrees 

General:
Weight: Approx. 18.35 oz / 520 g (without cable) 
Country of Origin: Hand-assembled in Brooklyn, NY, USA 
Warranty: 1 year (does not include earpads) 
Accessories: 6.3 mm terminated headphone cable, G-cushions (installed), F-cushions (additional), owner's manual