General Design Commentary on Grado Headphones
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. 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. All metal work for the PS1000 and SR325is 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.The Sonic Reproduction of Grado Headphones
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.Grado Prestige Headphone Series Details
The Professional, Statement, Reference Series and along with the Prestige Series SR325is, SR225i and SR125i 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. These headphones also utilize UHPLC copper in the connecting cable.The Latest Version, the SR325i
What does the i stand for in the new SR325is from Grado? Improved, that’s what! Yes, Grado has taken one of the world’s most acclaimed headphones and taken it a few steps further. The new SR325is has an upgraded driver and cable design. The way the SR325is’ driver, cable and metal housing move air and react to sound vibrations are now less affected by transient distortions. With the new 8 conductor cable design you will notice improved control and stability of the upper and lower range of the frequency spectrum with both better supporting Grado’s world renowned midrange. The SR325is will produce a sound that is pure Grado, warm harmonic color, rich full bodied vocals, excellent dynamics and an ultra smooth top end. Listen and EnjoyComments on the Grado SR325
"This headphone has something magic: a rare musicality that preserves the natural elegance of the music. The medium is refreshing, natural and sensual. The richness of the harmonics in the medium pulls you in. The instruments have a credible texture. The spectral balance is good. The timbres are rich and at time exceptional. The definition is flawless; the music keeps its nuances and richness of expression." -Diapason magazine / France
"The retro design makes these headphones look like they'd be more at home reproducing Mozart than pumping out Jay-Z. But looks can be deceiving: The gold colored cans churn out unrivaled sonics no matter what's sent through them. They produce strong, accurate bass, warm and natural mids, and crisp clean highs with almost no tonal coloration. They're impressively lightweight..." -Chuck Tannert / Penthouse magazine
"…the degree of insight these headphones offer into sounds is really very impressive. This is high quality music reproduction, thoroughly deserving of serious attention." -Richard Black / Hi-FiChoice magazine
"...speakers of similar sonic ability as the 325i would set you back at least three grand" -Stuff magazine
"In a world where predictable, playing-it-safe design is the norm, it’s hugely refreshing that a company such as Grado has the cojones to market a pair of cans that look like something Christopher Eccleston might have hanging up in his tardis. We think the 325is look great, in a retro stylee. They sound awesome, too!" -ARENA / Style For Men – Magazine
"What you need is a serious set of cans to do justice to your music and what better way to enjoy pristine hi-fidelity than by using staunch traditionalist Grado’s note-perfect SR325i earmuffs"
"…the engineer I assisted preferred the Grado’s diamond-like “clarity and cut” to the sound of the Sennheiser HD-650s." -John Marks / stereophile, vol.28 no 6
"I just purchased the SR325i and am amazed at the fidelity. According to everything I read, I would not be able to discern between the SR60 and SR325i without a headphone amp. I strongly disagree; I can hear an extreme difference. Don’t get me wrong, I love the 60s, but the 325i is awesome. Now, I need to purchase your amp!" -Chris Neuman
"I'd encourage anyone who wants to escape the typical, in yer face, cheap can sound to listen to these Grados." HiFi Choice, Winner of Audio Video's "GRAND PRIX AWARD"
"Of all the Grado Prestige headphones I've heard, the SR325 is my favorite!" -Audio magazine / Vol. 82, No. 6 / John Gatski
"The SR325s are easily the flattest, most accurate sounding phones tested, for critical monitoring, the Grados are hard to beat. Of all the phones tested, the SR325s were the only headphones I felt trustworthy enough for mixing." -Pro Audio Review / Vol. 4, No. 6 / Loren AlldriniGoodcans.com Review of the Grado SR325 Headphones