Features:
Vented diaphragm
Aluminum air chamber
UHPLC copper voice coil wire
UHPLC copper connecting cord

Tranducer type
dynamic
Operating principle open air
Frequency response 18-24
SPL 1mV 98
Normal impedance 32ohms
Driver matched db .05

The Top of the Range Prestige Headphone.

Incorporates all of the design features of the lesser models, combined with UHPLC wire in both the voice coil and connecting cord. Non-resonant Aluminium alloy is used in the make up of the metal driver housings. Grado also embarked on a complex treatment in order to increase the materials porosity. This ensures that the earphone chamber has no "ringing" which may obscure detail or add coloration. The resulting Headphone combines clean open highs, well defined mid range and vocal bass....