Grado

The Reference Series RS1 and RS2 along with the Prestige Series SR325's, SR225's and SR125's feature voice-coils that are wound from ultra-high purity, long crystal (UHPLC) oxygen free copper. The copper is slowly drawn through the die in extremely small increments and is annealed following each drawing operation. Ultra-high conductivity copper yields the clearest transmission and lowest coloration possible. The sound of UHPLC copper is smoother, cleaner and more dynamic. All use very high power neodymium magnets to provide maximum efficiency and better sound. Each headphone driver is made to Grado's high standards, then pair-matched for exact imaging. The RS1's, RS2's and SR325's also utilize UHPLC copper in the connecting cable.

All metal work for the SR325 is machined from a special non-resonant, very hard alloy. Grado utilizes a special processing method to increase the material's porosity. This complex treatment insures that the earphone chamber has no "ringing" which might obscure detail or add coloration.

Grado
4614 Seventh avenue
Brooklyn
New York 11220
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