ADC XLM IMPROVED MKII

This is the stylus that can make an old turntable sound like it remembers how music is supposed to feel.

Overview

The ADC XLM IMPROVED MKII isn't a cartridge you spot at a garage sale and recognize right away. It's not flashy, and it doesn't have the name recognition of a Shure V15 or a Denon 103. But if you care about tracking detail without extra record wear, you've probably heard whispers about this one. It's a replacement stylus - the genuine upgrade tip for a family of ADC moving magnet cartridges that had a quiet but serious run in the 1970s. The full cartridge body is long out of production, but the stylus is still sought after by owners who trust their ADC gear to do the job.

Audio Dynamics Corporation (ADC) made the XLM IMPROVED MKII as a precision elliptical replacement for a wide range of its higher-end cartridges, including the XLM, ZLM, QLM 36, and various Digital and Series III/IV models. It's not a generic needle swap. It expects a certain electrical environment. If your cartridge measures between 800-830 ohms resistance and 550-580 mH inductance, you're likely in the right neighborhood. It isn't plug-and-play for every turntable. It's for someone already invested in the ADC ecosystem, or who inherited a deck with one of these cartridges still ticking.

This stylus is built for performance. It has a 5.5 mV output and a frequency response of 15Hz to 24kHz. It tracks between 0.75 and 1.5 grams (though some sources specify 1.2-1.5g), which is light enough to be gentle on vintage vinyl but firm enough to stay planted through complex passages. At 5.75 grams total mass, it plays well with a range of tonearms, especially those designed for medium-mass cartridges. It's not a featherweight, but it's not a tank either.

It's obsolete now, and that status is part of what gives it weight in collector circles. Finding an original RSXM2 replacement stylus (its catalog number) in good condition is a small victory. Newer aftermarket options exist, like the RXL Improved Stylus or the RSXC variant, but owners report that the genuine ADC unit, with its Diasa elliptical tip, still delivers a clarity that's hard to replicate.

Specifications

Key Features

Diasa Elliptical Stylus

The XLM IMPROVED MKII has a Diasa elliptical tip. It's a nude diamond stylus bonded to a sapphire base before being attached to the cantilever. That's a construction method meant to reduce resonance and improve high-frequency tracking. Elliptical tips make more precise contact with the groove walls than conical ones, and the 0.2 x 0.7 mil dimensions mean it can trace finer modulations with less distortion. That gives more detail, especially in the upper mids and treble, without sacrificing durability. Owners note that records sound "fuller" and more resolved. It also reveals every scratch and bit of surface noise you've been ignoring.

Aluminium Cantilever

The stylus rides on a thin-wall aluminium alloy cantilever. It's lightweight and stiff, designed to transfer vibrations from the tip to the generator coils. It's not as exotic as beryllium or boron, but aluminium was a solid choice for its time, balancing responsiveness and cost. The compliance of 30 x 10⁻⁶ cm/dyne puts it in the medium range, suitable for tonearms with moderate effective mass. It's not ultra-sensitive, but it's forgiving enough for vintage arms that weren't designed for today's micro-tracking standards.

Electrical Precision

ADC was specific about compatibility. This isn't a "universal" stylus. The requirement that the cartridge body measure between 800-830 ohms resistance and 550-580 mH inductance means ADC expected users to verify their hardware before swapping. That level of electrical matching points to a design aimed at consistent, predictable performance. Paired correctly, it presents a 47kΩ load impedance to the preamp, which is standard, and its 820Ω output resistance ensures a clean signal transfer without excessive loading.

Collectibility & Value

Retailers officially list the ADC XLM IMPROVED MKII as obsolete, so finding a genuine RSXM2 replacement stylus in NOS (new old stock) condition takes luck and patience. It's not mythical, but it's not common either. Used units appear on eBay and Canuck Audio Mart, often still mounted on the original cartridge body, with prices varying widely based on condition and completeness.

Owners report high satisfaction, even if they don't consider themselves audiophiles. One user noted, "I'm not an audiophile by any means but I'm extremely happy with the sound of this needle on my Thorens turntable." Another wrote, "great stylus. everything on record is played well. but like any fine musical item be it speakers or in this case a needel. all defects in your records will show as well." That last point is the catch: this stylus doesn't hide flaws. If your records are worn or dirty, you'll know it. If they're clean, the payoff is a level of clarity that feels startlingly modern.

Aftermarket replacements are available, like the RXL Improved Stylus or the RSXC model, but collectors and purists tend to prefer the original ADC unit. Whether that's due to measurable performance or just loyalty to the brand, the market shows a preference for it.

eBay Listings

Vintage Sansui Classique 250T Turntable & ADC XLM Improved M

$306

Adc Xlm Improved Mkii Im Cartridge

$190

ADC OMNI PIVOT CARTRIDGE & NEW ADC XLM IMPROVED MKII STYLUS

$195

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.

Related Models

• ADC 10/E Mk II
• ADC 10E Mk.IV
• ADC 16/2R
• ADC 16
• ADC 27