We was the first to premiere the top-of-the-line Grado Labs GR10 earphones at the 2010 Rocky Mountain Audio Fest [RMAF] in Denver and we -- along with lucky festival attendees -- absolutely loved what we heard: an extended, intensely detailed top-end response underpinned by wonderfully punchy bass that positively defines the classic Grado 'signature sound' and musical involvement. Expect slightly more midrange presence than in the less pricey Grado in-ear models, a wonderful thing for audiophile listeners seeking smooth definition and full musical body for jazz vocals, singer/songwriter music and well-produced modern & classic rock. As typical for Grado, the bass response is engagingly warm and cleanly textural, but without a trace of bloat or 'one-note' boom. The musical clarity and timbral definition of the GR10 should also please classical and symphonic afficionados given its airy soundstage depth -- a great feat for any in-ear monitor -- that allows instruments to 'float' correctly in the room space image. The consistent tonal balance and elegant rhythmic pace of the GR10 sounds ideal for reference-grade or master recordings and provides pristine access into the previously obscured nooks & crannies of your most well-worn favorites, potentially transforming your portable listening into a newly revelatory acoustic experience. The Grado GR10 come in a nifty mellow green color that makes them nicely stand out from the other Grado Labs earphones. The packaging contains three sizes of clear silicon eartip sleeves in S/M /L sizing; try them all for the most secure in-ear fit -- and best resulting sound quality. As with the other Grado in-ears, the earpiece fit is not overly invasive or deeply seated into the ear canal, meaning the GR10 remains a great candidate for newcomers to in-ear headphones or for serious audio lovers who demand long-wearing comfort and top acoustic performance from their 'on-the-go' in-ears. The GR10's highly efficient 32 Ohm impedance ensures robust performance direct from your portable player without a headphone amp required. Total cord length is 51 inches and the high-quality cable construction is a pure OFC design with minimal cord microphonics or annoying cable contact noise issues. A raised dot on the left earphone provides tactile indication of channel allowing the headphones to be worn correctly even in the dark -- now there's a handy feature! The 1-year manufacturer's warranty is provided directly by Grado Labs located in Brooklyn USA.