ADC SRX-I (Unknown Years)
A replacement stylus for an old ADC cartridge, with very few specs on record
Overview
If you own an ADC cartridge that needs a new needle and the label says "SRX-I," there isn't much to go on. The ADC SRX-I is a stylus: a replaceable needle assembly made for a specific ADC cartridge. That much is known. There's no word on tracking force, frequency response, output voltage or compliance. Nobody says whether it's elliptical, conical or some hybrid profile. Cantilever material and stylus tip radius aren't listed either.
It was made by American Diagnostic Corporation (ADC), a name that might raise eyebrows given today's medical associations. ADC isn't McIntosh or Denon, but it had a quiet presence in the analog audio world. The SRX-I appears to be one of those service parts, built 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. Budget model, midrange workhorse or high-compliance tracker for warped records - the file doesn't say.
People are still buying it, or at least a replacement. LP Gear 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 not outrageous either, especially if your cartridge is still in good shape and just needs a fresh tip. A third party still making replacements suggests there's a user base keeping these cartridges alive. There are no specs, no reviews and no clear production era, so it's hard to say whether this stylus was ever notable.
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. That price is for 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. With so little documentation, it's unlikely this stylus is collected for its own sake. Its value is in use, for anyone who owns the matching cartridge.
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