Grado Labs Prestige Red3: The Prestige Red3 is an MM cartridge that delivers the trademark Grado “house” sound, with a warm, punchy midrange and a strong low end. The treble is airy and no longer rolled-off (or diminished at the higher end, which was a characteristic of previous generations of this cartridge). The Red3’s 5 mV of output make it compatible with any MM phono preamp available.