ADC SRX-I (Unknown Years)
A replacement stylus that keeps an old favorite spinning—when you can find the specs
Overview
If you own an ADC cartridge that needs a new needle and you’re staring at the label “SRX-I,” you’re not alone—and you’re probably squinting at a product page with almost no technical details. The ADC SRX-I is a stylus, plain and simple: a replaceable needle assembly designed for use with a specific ADC cartridge. That much we know. What we don’t know could fill a service manual. There’s no mention of tracking force, frequency response, output voltage, or compliance. No word on whether it’s elliptical, conical, or some hybrid profile. No indication of cantilever material or stylus tip radius. It’s a ghost in the signal chain—essential, but nearly invisible in the record.
Manufactured by American Diagnostic Corporation (ADC), a name that might raise eyebrows given today’s medical associations, this stylus lives in the shadow of a brand that once had a quiet presence in the analog audio world. ADC isn’t McIntosh or Denon, but for a slice of the market in the analog revival era, The SRX-I appears to be one of those service parts—designed not for glory, but for function. It’s listed under ADC’s lineup in archival brand indexes, but with no siblings, no hierarchy, and no context about where it sat in the product stack. Was it a budget model? A midrange workhorse? A high-compliance tracker for warped records? The file is blank.
And yet, people are still buying it. Or at least, they’re buying the replacement version offered by LP Gear, who sells a compatible stylus for the ADC SRX-I (also listed as SRX I or SRXI) at $28.95. That’s not nothing for a needle—but it’s also not outrageous, especially if your cartridge is still in good shape and you just need a fresh tip. The fact that a third party is still manufacturing replacements suggests there’s a user base out there keeping these things alive. But without specs, without reviews, without even a clear production era, it’s hard to say whether this stylus was ever notable—or if it’s just survived by sheer inertia.
Specifications
| Manufacturer | American Diagnostic Corporation (ADC) |
| Product type | Stylus/needle for a cartridge |
| Exact product name | ADC SRX-I cartridge stylus (also referred to as ADC SRX I, ADC SRXI) |
Collectibility & Value
The ADC SRX-I stylus is available as a replacement part from LP Gear at $28.95. This price reflects the cost of a modern reproduction or compatible stylus assembly, not an original NOS (new old stock) unit. No original pricing or production years have been confirmed, and no data exists on collector demand, failure rates, or maintenance challenges. Given the lack of technical documentation and historical context, it’s unlikely this stylus is collected for its own sake—its value lies purely in utility. If you own the matching cartridge, this is a lifeline. If you’re hunting for a rare part, good luck finding details.
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