Both the Black+3 and Green+3 use a three piece OTL cantilever that has a Grado specific diamond mounted on a brass bushing. The Green+3 are hand selected from Black+3 production runs which meets higher test specifications. Approximately 15% of the run usually exhibits these specs and become a Green+3.
Grado’s OTL, or optimised transmission line, technology provides an ideal transfer of signal from the surface of the LP to the generator of the system. This technology rejects unwanted resonances and lowers distortion preserving the fundamental and harmonic frequencies of the music. This also helps keep noise generated by the motor system in the cartridge to a minimum.
The Black+3 & Green+3 are all hand assembled, with some builders having over 25 years of experience. With the recent development of the highly received Lineage Series of cartridges, we were able to have a trickle down of technology and bring a new technique to the Black3 & Green3. This updated series of cartridges offers excellent tonal balance, dynamics, and realism, for a most rewarding reproduction of vocals and instruments. Our coil winding techniques, using ultra high purity copper wire which were honed during the development of the Lineage Series, have let the electrical circuits achieve unison between the four coils in each phono cartridge. This allows for a precise balance between channels and accurate stereo imaging.
As in all Grado phono cartridges the Black+3 & Green+3 are powered by a twin magnet system that optimises the balance between stereo channels. All internal magnetic circuit parts are held to extremely high tolerances creating the desired stereo imaging. Grado’s patented Flux-Bridger design allows the Black+3 & Green+3 to have one of the lowest effective moving mass generating systems while creating an excellent balance throughout the full frequency range.
Frequency Response: 10Hz-55kHz
Principal: Moving Iron
Channel Separation at 1KHz: 30db
Input Load: 47K
Output at 1KHz 5CM/sec.: 5mV
Recommended Tracking Force: 1.5g
Stylus Type: Elliptical
Compliance CUs: 20
Stylus Replacement: GR-STYGRN