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All Grado headphones have a vented diaphragm design that incorporates a
large air chamber. This design concept lowers the frequency resonance (distortion) of the diaphragm and
extends bass response. The diaphragm is made of a low mass polymer, carefully formed to broaden resonant
modes to reduce their amplitude. The diaphragm mass is determined with the compliance of the suspension in
mind so that the desired low frequency resonance is achieved. The diaphragm's total mass is calculated to
provide a full 20 KHZ bandwidth, while avoiding break-up at lower frequencies.
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's wooden
Reference Series are hand-crafted at our labs from a specially selected species of mahogany. An intricate
procedure of curing is done between production steps to achieve optimal sonic quality. The overall sound
remains pure Grado, warm harmonic color, full bodied vocals, excellent dynamics and an ultra smooth top end.
Technical refinements for Grado drivers include improved diaphragm and voice coil design for
increased bass response and a larger perceived sound stage. A unique process to "de-stress" the
diaphragm results in enhanced inner detail. An increased ability to control driver resonance virtually
eliminates distortion. For all models, an improved headband spring will afford greater comfort for the
majority of listeners.
AND THE SOUND?
Grado headphones can reproduce as natural a soundstage from
stereo recordings and provide as much listening pleasure as a good pair of speakers do. Grado headphones
are free of room effects and placement problems, and they minimize any interference from external noise.
They also offer portability and the ability to listen without worrying about the neighbors. With Grado
headphones, you will hear recordings with greater clarity and with deeper bass than others! Grado
headphones are the antithesis of mass production, as each Grado headphone is hand-assembled and closely
scrutinized to meet full performance specifications in the U.S.A.
The newest edition to the Grado family, the RS2 is the little brother
of the RS1. The characteristics of the RS2 remain the same as it's distinguished big brother, with the hand
crafted mahogany, but there is a smaller wooden air chamber. Although a miniature version of the RS1, they
still maintain an overal sound that is pure Grado, warm harmonic color, full bodied vocals, excellent
dynamics and ultra smooth top end. These truly are audiophiles dream.
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Features:
- Vented diaphragm
- Wooden air chamber
- UHPLC copper voice coil wire
- UHPLC copper connecting cord
- Tranducer type: dynamic
- Operating principle: open air
- Frequency response: 14-28
- SPL 1mV: 98
- Normal impedance: 32ohms
- Driver matched db: .05
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"...it's the full-bodied sound - especially the luscious, rich
resonant bass - that makes the Grado 'phones special"
- Sam Telling - STEREOPHILE Vol. 21, No.2
"If you audition the Grado RS2s, you may
find something you never heard before: the calm artistry of well made sound."
- Jim Merod, Jazz-Now - Magazine
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Questions?
1.973.239.1799
