Grado Red 3

The Red3 uses a four-piece OTL cantilever with a Grado-specific diamond mounted on a brass bushing. The Red3 are hand-selected from Blue3 production runs that meet higher testing specifications.

Grado’s Optimized Transmission Line (OTL) technology provides ideal signal transfer from the LP surface to the system’s generator. This technology rejects unwanted resonances and reduces distortion by preserving the fundamental and harmonic frequencies of the music. It also minimizes noise generated by the motor system in the cartridge.

Grado’s OTL stylus/cantilever design makes records quieter, improves the height, width and depth of the soundstage, and presents more detail than ever before.

As with all Grado phono cartridges, the Red3 is powered by a twin-magnet system that optimizes the balance between the stereo channels. All parts of the internal magnetic circuit are subject to extremely high tolerances, creating the desired stereo imaging. Grado’s patented Flux-Bridger design allows the Black3 to have one of the most efficient moving mass generating systems while creating excellent balance across the frequency range.

Technical Specifications

Cartridge Type

• Moving Magnet (MM)
• Ultra-high purity copper coil

Audio Performance

• Frequency response: 10 - 55,000 Hz
• Channel separation at 1 kHz: 30 dB
• Load impedance: 47 kΩ

Electrical Characteristics

• Inductance: 45 mH
• Resistance: 475 Ω

Mechanical Characteristics

• Recommended tracking force: 1.5 g (1.0 - 2.0 g)
• Compliance: 20 µm / mN
• Weight: 5.5 g