The Audio-Technica AT33MONO (released for Audio-Technica's 45th Anniversary of cartridge production) is a moving coil (MC) cartridge engineered specifically for playing mono microgroove records.
Key Specifications
| Specification | Details |
|---|---|
| Cartridge Type | Dual Moving Coil (MC-type) — true horizontal mono configuration |
| Frequency Response | 20 – 20,000 Hz |
| Output Voltage | 0.35 mV (1 kHz, 5 cm/sec, horizontal signal) |
| Channel Separation / Ratio | 30 dB (1 kHz) |
| Output Channel Balance | 1.0 dB (1 kHz) |
| Vertical Tracking Angle | 23° |
| Vertical Tracking Force Range | 2.3 – 2.7 g (2.5 g standard) |
| Stylus Shape | 0.65 mil conical (nude square shank) |
| Cantilever | Duralumin pipe |
| Coil Impedance | 10 Ω (1 kHz) |
| Coil Inductance | 28 µH (1 kHz) |
| DC Resistance | 10 Ω |
| Recommended Load Impedance | Greater than 100 Ω (when using a head amplifier or MC phono stage) |
| Static Compliance | 20 × 10⁻⁶ cm/dyne |
| Dynamic Compliance | 6 × 10⁻⁶ cm/dyne (100 Hz) |
| Body Material | Aluminium / Synthetic Resin with Hanenite anti-vibration damping rubber |
| Mounting | Half-inch mount (1/2" centers) |
| Weight | 6.9 g (0.24 oz) |
Important Notes
- Compatibility: Designed for microgroove 33⅓ and 45 RPM vinyl records; not compatible with standard-play (SP) 78 RPM shellac records.
- Stereo Safety: Although it only generates electrical signals from horizontal groove movement, it has appropriate vertical compliance, making it safe to use on stereo playback systems.
- Preamp Requirement: Requires a receiver or phono preamplifier with a compatible moving-coil (MC) input (or an external step-up transformer / head amp). The stylus assembly is not field-replaceable.
