The AT33Mono is made specifically for use on mono systems. It has a horizontal coil, and so in principle only generates electricity horizontally.

The AT33Mono produces sound to a very high quality because it does not easily pick up unnecessary strain components from distorted or scratched records, producing audio that you couldn't possibly get from a stereo cartridge.
The AT33Mono also has appropriate compliance in the vertical direction, so will not cause damage to stereo records. Enjoy those well-known classic mono records of yesteryear with the AT33Mono.
Mono cartridge compatible with stereo playback systems.
Elliptical stylus chip and hard duralumin cantilever.
10Ω middle impedance specification.
PCOCC coil prevents crystal gain boundary formation (in transmission direction).
Strong body stabilized by a rigid body set-up.
"Hanenite" anti-vibration rubber eliminates unnecessary vibrations.
High-quality Sound / Brass fastening screw.
*This Model is not compatible with SP records.

Specifications
Type: MC-Type
Playback frequency range: 20-20,000Hz
Output voltage: 0.35mV (1kHz and 5cm/sec. horizontal signal)
Horizontal/vertical output ratio: 30dB (1kHz)
Output balance: 1.0dB (1kHz)
Stylus pressure: 2.3-2.7g (2.5g standard)
Coil impedance: 10Ω (1kHz)
DC resistance: 10Ω
Load resistance: More than 100Ω (when Head amp connected)
Coil impedance: 28μH (1kHz)
Static compliance: 20×10???6cm/dyne
Dynamic compliance: 6×10???6cm/dyne (100Hz)
Needle shape: Round needle (0.65mil)
Cantilever: Duralumin pipe
Vertical Tracking angle: 23°
Dimensions: H16×W16.6×D26.5mm
Weight: 6.9g

Accessories: Non-magnetic screwdriver x1, Washers x2, Protector x1, Cartridge fasTening screw 13mm×2, 19mm×2, Nut x2, Brush x1, PCOCC lead set x1