ADC QLM31 Mk III ()

Name: ADC QLM31
Brand: ADC

A no-frills moving magnet cartridge built for budget turntables of its era — simple, replaceable, and forgotten by time

Overview

The ADC QLM31 Mk III is one of those cartridges that didn’t aim for glory — it just wanted to track a groove without breaking the bank. Made by Audio Dynamics Corporation (ADC), a name better known for their higher-end XLM and ZLM lines, the QLM31 Mk III slots into the lower rungs of the ADC family tree. It’s a phono cartridge, nothing more, nothing less: designed to plug into entry-level turntables and get the job done. No exotic materials, no high-output wizardry, no cult following. Just vinyl playback for the masses.

Owners report that the QLM series was “a nice cartridge suitable for lower end turntables like the BSR and Garrard changers that were common at the time,” which tells you everything you need to know about its intended home. These weren’t audiophile decks — they were record changers stacked under consoles in suburban living rooms, spinning 45s and LPs with all the finesse of a cafeteria tray slide. The QLM31 Mk III fit right in: reliable enough, easy to mount, and most importantly, affordable. It likely came paired with a headshell, as one listing specifically mentions a used QLM31 Mk III offered with a new diamond stylus and new headshell — a small detail, but one that suggests it was often sold as a complete, ready-to-install unit.

While the exact specs remain buried in time — no tracking force, output, or frequency response data has surfaced — we do know where it stood in the ADC hierarchy. According to user recollections, “the ZLM was the top of the line followed by the XLM III, and/or XMM Improved, then QLM, QLM Improved.” That places the QLM31 firmly in the value segment, a step below the models that collectors now chase. It wasn’t meant to be cherished; it was meant to be replaced. And that’s probably why so few details survive. When your cartridge cost a fraction of the turntable, nobody saved the spec sheet.

Specifications

Manufacturer	ADC (Audio Dynamics Corporation)
Product type	Phono cartridge
Exact product name	ADC QLM31 Mk III

Historical Context

The QLM31 Mk III existed in the shadow of ADC’s more celebrated lines, serving as a practical option for budget-conscious buyers during an era when automatic turntables dominated living rooms. It was part of a broader QLM series — including models like the QLM 30, 31, 32, and up to 36 — aimed at entry-level playback. These cartridges were designed to work reliably with common changers from brands like BSR and Garrard, where durability and ease of use mattered more than sonic nuance. Within ADC’s lineup, the QLM series sat below the XLM and ZLM models, which were positioned as higher-performance alternatives.

Collectibility & Value

The ADC QLM31 Mk III doesn’t command attention in today’s vintage audio market. It’s not rare, not revered, and not particularly sought after. One listing shows a used QLM31 Mk III cartridge offered with a new stylus and headshell, suggesting it still circulates among tinkerers and turntable restorers. While no specific price was given for that listing, a user reported purchasing a similar model — the ADC QLM 34 MkIII — with stylus for $20, which gives a rough benchmark for what these cartridges go for when they do appear. They’re not collectible in the traditional sense, but they’re useful: a functional, period-correct replacement for someone restoring a vintage changer who wants to stay authentic without spending much.