Audio-Technica - AT33xMONO/II - True Mono Dual Moving Coil Cartridge

Warm, full-bodied mono. The Audio-Technica AT33xMONO/II is a True Mono dual moving coil cartridge whose coils respond only to horizontal groove movement, cutting out vertical noise. A samarium cobalt magnet and pure iron yoke, shaped for mono sound, give a warm, richly textured presentation, particularly suited to mono jazz from the 1950s and '60s. 0.65 mil conical nude stylus, duralumin pipe cantilever, PCOCC coils and a die-cast zinc composite body. Made in Japan.

A Cartridge Dedicated to Mono

Mono records carry their information in the horizontal movement of the groove. In a mono pressing, any vertical movement is just noise from warps, dust and wear. The AT33xMONO/II is designed to ignore it.

It uses a True Mono dual moving coil design that is unaffected by vertical noise components in the groove and generates an electrical signal only from horizontal movement. The result is exceptionally clear mono sound with a more substantial low end and reduced surface noise. Because it has two coils, it also works well for mono playback on a stereo system.

Warm and Organic — Samarium Cobalt Magnet and Pure Iron Yoke

What sets the AT33xMONO/II apart in the AT33x Series is its magnetic system. Where the stereo models and the AT33xMONO/I use a neodymium magnet with a Permendur yoke, the AT33xMONO/II uses a samarium cobalt magnet paired with a pure iron yoke, shaped for optimal monaural sound reproduction. It generates power efficiently and delivers a warm, richly textured sound.

The AT33xMONO/II preserves the warmth and fullness of acoustic instruments, such as those on 1950s and '60s mono jazz recordings, and suits classic vocals and orchestral works as well.

0.65 mil Conical Nude Stylus on a Duralumin Cantilever

A 0.65 mil conical nude stylus is well suited to the consistent width and depth of mono record grooves, for accurate tracking. It is mounted on a high-hardness duralumin pipe cantilever, which adds stability and transient accuracy.

PCOCC Coils at the Fulcrum

The coils are made from PCOCC (Pure Copper by Ohno Continuous Casting) for pure, smooth signal transmission, and are positioned at the cantilever's fulcrum to give clean transmission of the horizontal mono signal.

A Composite Body That Disperses Resonance

Like the rest of the AT33x Series, the body combines die-cast zinc, aluminium and high-rigidity polymer to reduce and disperse resonance, helping deliver a balanced, natural sound.

Easy to Mount

Built-in threaded holes allow simple, secure mounting with only two screws, which is especially handy with an integrated tonearm. A non-magnetic screwdriver, brush, washers, mounting screws in three lengths and a protector are all included.

Please Note

The AT33xMONO/II's stylus assembly is not field-replaceable. Audio-Technica offers a fee-based Moving Coil Exchange Program to properly service your moving coil cartridge. At 0.37mV output it is a low-output moving coil cartridge, so it needs a phono stage with an MC input, or a step-up device.

Feature Cards

🎙️ True Mono — Horizontal Signal Only

Dual coils respond only to horizontal groove movement, rejecting vertical noise for a more substantial low end and reduced surface noise.

🧲 Samarium Cobalt Magnet + Pure Iron Yoke

Shaped for mono sound, for efficient power generation and a warm, richly textured presentation that suits jazz, vocals and orchestral works.

💎 0.65 mil Conical Nude Stylus

Suited to the width and depth of mono grooves, on a high-hardness duralumin pipe cantilever for stable, accurate tracking.

🛡️ Die-Cast Zinc Composite Body — Made in Japan

Die-cast zinc, aluminium and high-rigidity polymer disperse resonance. PCOCC coils at the fulcrum. Threaded mounting holes for easy installation.

Editorial Blockquote

"Warm, detailed mono sound, perfect for vintage jazz." — Audio-Technica AT33xMONO/II

At-a-Glance Bullets

• AT33x Series True Mono dual moving coil (MC) cartridge
• Signal from horizontal groove movement only — unaffected by vertical noise
• Stylus: nude conical, 0.65 mil
• Cantilever: duralumin pipe
• Samarium cobalt magnet and pure iron yoke — shaped for mono sound
• PCOCC (Pure Copper by Ohno Continuous Casting) coils
• Composite body: die-cast zinc, aluminium and high-rigidity polymer
• Threaded mounting holes (M2.6) — two screws required
• Output voltage: 0.37mV (1kHz, 5cm/sec, horizontal signal)
• Frequency response: 20–20,000Hz
• Tracking force: 2.3–2.7g (2.5g standard)
• Vertical tracking angle: 20°
• Horizontal/vertical output ratio: 25dB (1kHz)
• Recommended load impedance: ≥ 100Ω (when head amplifier connected)
• Weight: 10.2g
• Stylus assembly not field-replaceable — fee-based Moving Coil Exchange Program
• Made in Japan

Specifications

Closing Quote

"One groove. One channel. A warmer, more organic way to hear your mono records. The Audio-Technica AT33xMONO/II."