Audio Technica AT-VM670xSP

The Audio-Technica AT-VM670xSP represents a refined technical solution for 78 rpm record enthusiasts. This dual moving magnet (MM) cartridge is specifically designed to deliver faithful reproduction of mono shellac records, featuring a 3 mil conical stylus perfectly suited to the wide grooves of vintage recordings. As part of the new AT-VMx series launched in 2025, it benefits from substantial technological improvements over the previous generation, including the use of PCUHD copper for the coils and an optimized structure for superior transient response.

A Design Dedicated to the Musical Treasures of Yesteryear

The AT-VM670xSP cartridge stands out for its design, specially tailored to the unique characteristics of 78 rpm records. Its rounded 3 mil conical diamond (compared to the 0.6–0.7 mil of standard cartridges) ideally fits the wider grooves of shellac records. This specific dimension helps prevent distortion and premature wear of both the stylus and your precious historical recordings.

The aluminum cantilever offers optimal rigidity while maintaining sufficient lightness to track the frequent irregularities of old grooves. This technical combination ensures maximum extraction of sound information while minimizing wear on often irreplaceable records.

The recommended tracking force of 5 grams (range 4.5–5.5 g) may seem high compared to modern cartridges, but it is essential to ensure stable tracking of 78 rpm grooves. As several users point out, this higher tracking force allows the cartridge to maintain constant contact with the often uneven surfaces of old records, thus avoiding the skipping that standard cartridges may experience.

Dual Moving Magnet Technology for Outstanding Mono Reproduction

The AT-VM670xSP uses Audio-Technica’s proprietary VM (Vector Magnet) technology, based on a V-shaped magnet configuration that replicates the geometry of original cutting heads. A clever feature of this model is the internal connection of the two magnets, specifically designed to reduce background noise and create a focused central sound image, perfectly suited to mono recordings.

The paratoroidal generator system employs two stacked coils per channel, positioned one behind the other, thereby improving signal generation efficiency and sound clarity. This sophisticated architecture enables the cartridge to extract the maximum musical information from the grooves while minimizing distortion—a particular challenge with vintage records.

Beyond these fundamental qualities, the AT-VM670xSP benefits from the latest technological innovations introduced in the AT-VMx series, notably the use of PCUHD (Pure Copper Ultra High Drawability) copper as the coil conductor. This high-purity material, also used in Audio-Technica’s high-end audio cables, delivers powerful bass response and creates a broader, more detailed soundstage.

Practicality and Thoughtful Engineering Details

The AT-VM670xSP incorporates several practical features that make everyday use easier. The flip-down stylus guard is equipped with a V-shaped notch that serves as a visual guide for precise stylus placement on the record—a detail especially appreciated when handling rare or fragile recordings.

Integrated M2.6 threaded inserts in the cartridge body greatly simplify installation on any standard 1/2-inch headshell. This feature, new to the AT-VMx series, represents a significant ergonomic improvement over previous models.

Several users recommend acquiring an additional dedicated headshell for this cartridge, allowing you to quickly switch between formats without constantly unscrewing and reattaching cartridges. This approach turns what could be a tedious 10-minute process into an almost instant change.

Practical Applications for Enthusiasts and Archivists

The AT-VM670xSP is aimed at several user profiles with specific needs. Serious 78 rpm record collectors will find it an essential tool for fully enjoying their historical acquisitions in the best possible conditions.

Archivists and sound heritage conservators will appreciate its ability to faithfully reproduce the content of old recordings while minimizing wear on the media. Several users report using this cartridge for digitization and archiving projects of family or institutional 78 rpm record collections.

The cartridge is also perfectly suited for use with modern turntables equipped with a 78 rpm speed, such as the Audio-Technica LP120XUSB mentioned by a satisfied user. This combination allows not only listening but also easy digitization of old records via the integrated USB port.

Improvements Over the Previous Generation

The AT-VM670xSP is part of the new AT-VMx range launched at the High End 2025 show in Munich. This series represents the first major overhaul of Audio-Technica’s VM technology since 2016.

Key improvements include the use of PCUHD copper for the coils, an optimized structure with fewer coil turns for better transient response, and practical features such as threaded inserts and the stylus guard with a V-shaped notch.

To ensure system longevity, Audio-Technica offers the AT-VMN70xSP replacement stylus, sold separately, allowing you to extend the life of the cartridge without having to replace the entire mechanism.

Technical Specifications

General Features

• Type: VM
• Frequency Response: 20 Hz to 20 kHz

Electrical Specifications

• Output Voltage: 4.7 mV (1 kHz, 5 cm/s)
• Horizontal/Vertical Output Ratio: 20 dB (1 kHz)
• Output Impedance: 1.6 kΩ (1 kHz)
• DC Resistance: 375 Ω
• Recommended Load Impedance: 47 kΩ
• Recommended Load Capacitance: 150 to 250 pF
• Coil Inductance: 240 mH (1 kHz)

Physical Specifications

• Vertical Tracking Force: 4.5 to 5.5 g (5 g standard)
• Static Compliance: 23 × 10^-6 dyne/cm
• Stylus: Rounded conical
• Stylus Tip Radius: 3 mil
• Cantilever: Aluminum tube
• Vertical Tracking Angle: 20°

Dimensions and Weight

• Dimensions: 28 mm × 18.3 mm × 17.6 mm (H × W × D)
• Threaded Insert: M2.6 × 2
• Weight: 7.2 g

Accessories and Replacement Parts

• Replacement Stylus (sold separately): AT-VMN70xSP
• Included Accessories:
  • Two cartridge mounting screws (M2.6) (10 mm × 2.8 mm × 2.5 mm)
  • Two washers