ADC RQ36 Stylus for Cartridge (Q36)

A tiny diamond tip with a big job - keeping vintage records alive, one groove at a time.

Overview

The RQ36 is not a cartridge and not a turntable. It is the replacement stylus for the ADC Q36 cartridge. It is a bonded diamond elliptical stylus, built to trace the fine contours of vinyl better than a basic spherical tip. It carries the ADC name, but there's a catch. Multiple sellers describe this part as a "Copy / Pattern / Replica" and say outright that it's "Non ADC." So it's likely an aftermarket reproduction made to fit where the original once did. That doesn't make it a bad part. Genuine factory replacements are vanishing fast, and this is the compromise.

Specifications

Manufacturer	ADC (Audio Dynamics Corporation)
Product type	Replacement stylus (needle) for a phonograph cartridge
Stylus profile	Elliptical
Stylus construction	Bonded Diamond Stylus

Key Features

Elliptical Profile for Deeper Groove Contact

The elliptical shape is a real step up from a spherical tip. According to supplier descriptions, this profile allows the stylus to "track portions of the groove other styli simply cannot reach." That means more precise contact with the modulated walls of the groove, especially in the high-frequency zones where the detail lives. It's geometry, not magic. The elliptical tip fits deeper and aligns better with the cutting angle used in mastering, which reduces distortion and improves channel separation.

Enhanced Sound Quality Through Greater Groove Contact

Because it makes "greater contact with the record groove wall," the RQ36 is said to deliver noticeably better sound quality than more rudimentary designs. It doesn't add warmth or color. The larger contact area with the groove means more faithful signal retrieval, particularly in complex passages where a lesser stylus might skip or smear.

High-Frequency Accuracy and Flat Response

The supplier claim is "Extremely accurate tracking of high-frequency passages and ruler-flat frequency response within the audible range." That's a bold claim, but it lines up with the engineering intent behind elliptical styli in general. If the cartridge alignment and tonearm setup are correct, the RQ36 should deliver clean, uncolored highs without harshness, assuming it's fresh and properly mounted. The available data gives no tracking force or compliance, so setup relies on the cartridge-level specs, not the stylus alone.

Collectibility & Value

The current market price for the ADC RQ36 stylus is £54.00, VAT included—steep for a replacement needle, but not surprising given its status as a hard-to-find part for vintage gear. The high cost reflects scarcity, not luxury. With manufacturers having "phased out many replacement styli for decades," this is less a collectible and more a survival item. The warning is blunt: "A Worn stylus can cause Serious (Irreversible Damage) to your records, and provide poor sound quality." That’s not fearmongering—it’s vinyl 101. And the recommendation to "purchase at least two replacement styli (Spare)" isn’t just good advice, it’s a preservation strategy. Once these are gone, they’re gone.