Shelter 9000 Phono Cartridge Specifications Output Voltage: 0.6 mV at 1kHz 5cm/sec. Channel Balance: Within 0.8dB at 1kHz Stylus Tip: 0.3 x 0.7mil Elliptical Nude Diamond Weight: 11g DC Resistance: 11 ohms Tracking Force Range: 1.4 to 2.0g Recommended Load Impedance: within 10 to 30 ohms with step-up transformer Within 100 ohms with head amplifier Compliance: 9cu Frequency Response: 20Hz to 20kHz +/-2dB Channel Separation at 1 kHz: >25dB Anodized Aluminum Body with neodymium magnet Positive Feedback Review of the Shelter 9000 Everything the 90X is known for is there, the same frequency integration and coherency, the same warmth, but the two little fissures in the 90X’s personality have been repaired: the slight dynamic reticence, the slight vagueness in imaging. The 9000 sounds BIG. With it on the SME 312 arm, the space in the front of my room is entirely filled in. This guy has powerful, yet composed, attacks: if we were talking about amps, I’d say it’s like the 90X with a lot more watts. It makes the precursor seem polite…Treble extension is just as high and now flesh is continuous. Piccolos are just as piercing, but without a hint of shrillness. Channel separation and resolution are enhanced-I’m learning more about each instrument. With a lighter tonal balance than the 90X and tight, articulate bass, the 9000 has better PRAT. The low-end doesn’t monopolize the sound or muddy the beat…Guaranteed, you will be hearing more about this cartridge – a lot more as word gets out. Stunning performance.