ADC QLM36 MKIII ()

This special elliptical diamond stylus might be why the high hats shimmer when the needle drops.

Overview

The ADC QLM-36 MKIII isn't a cartridge you mount on your tonearm - it's the business end of one, the replaceable stylus that rides the groove. It's known as the ADC QLM 36 MKIII or the ADC QLM36 MKIII. It was made for a specific generation of ADC moving magnet cartridges. The original specs and design of the full cartridge body are a mystery, but the stylus has a reputation for precision. ADC has a cult following among analog enthusiasts, and this model fits into a lineage collectors respect, especially the XLM series, which many consider the golden era of ADC's engineering. The QLM36 MKIII shares its naming with other MKIII variants like the QLM-30 MKIII and QLM-32 MKIII, which suggests a broader family of upgrade styli. Its exact hierarchy and intended cartridge match aren't documented.

This stylus was built to perform. It's not a generic elliptical. It's a *special* elliptical diamond, a term that hints at tighter manufacturing tolerances and a more refined contact profile with the vinyl. Elliptical tips have two radii, so they trace the high-frequency modulations in the groove walls more accurately than a conical tip can. This one is also highly polished, which LP Gear claims improves both tracking and tracing, meaning it stays stable under dynamic passages and pulls out finer musical detail. The promise is clarity without sterility, on a 1970s pressing or a well-cut 1980s LP.

Specifications

Manufacturer	ADC
Stylus tip shape	special elliptical diamond

Key Features

Special Elliptical Diamond Tip

The "special" label suggests ADC or its replacement partners like LP Gear were pushing beyond standard geometries. The shape gives a smaller contact area with the groove wall than a conical tip, so it can resolve higher frequencies and stay planted during complex passages. The highly polished surface reduces friction and wear on your records. Owners report that this kind of tip delivers a more "harmonically complete" sound, with fuller instruments, more presence in vocals, and a more precise stereo image.

Fine Detail and Sonic Transparency

According to LP Gear, using this replacement stylus results in "finer detail and harmonically complete sound quality." On a well-maintained record, that could mean the decay of a cymbal, the breath behind a saxophone, or the faint room tone of the original studio. If your current needle makes music feel a bit flat or distant, swapping to a special elliptical like the QLM36 MKIII may help. The music doesn't change, but you hear more of what was already there.

Collectibility & Value

The ADC QLM-36 MKIII stylus is both accessible and somewhat elusive. As a replacement part, it's not usually the centerpiece of a collection, but for people maintaining vintage ADC gear it's essential. The LP Gear version is listed at $36.95, a relatively affordable upgrade path. Original equivalents like the ADC RS-Q36 stylus cost more at $69.95, so OEM branding carries a premium. On the secondary market, prices vary. A standalone needle has been listed between $55 and £52 (as of March 2025), while a full cartridge with headshell recently appeared for $134 (as of September 2025). That jump hints at scarcity: the stylus alone is available, but complete units with the original body are rarer and more desirable.

ADC is often described as a "treasure trove of undervalued gems," with a caveat: focus on the golden era, particularly the original XLM cartridges, and be wary of later models that were rebadged OEM units. The QLM36 MKIII falls into a gray zone. It's not an XLM, but its MKIII suffix and special stylus suggest a serious tier of ADC's output. Without original specs or production dates, its exact status stays fuzzy. There's no data on common failures or maintenance quirks specific to this stylus, but given ADC's reputation for fragile stylus assemblies in other models, owners should handle alignment and tracking force with care. Anyone hunting for one will have to piece the story together from parts listings and secondhand finds. It didn't come with a manual or a press kit.

eBay Listings

ADC QLM36 MKIII vintage audio equipment - eBay listing photo 1

ADC QLM36 MkIII Genuine Original Replacement Diamond Stylus

$125

See all ADC QLM36 MKIII on eBay

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