Tannoy SRM12X (ca 1980)
At nearly a meter tall, these cabinets take up a lot of room and get noticed.
Overview
The Tannoy SRM12X, also known in the field as the Super Red Monitor, showed up around 1980 as a dual concentric passive monitor for professional and high-end enthusiast use. It has a 12-inch driver in a two-way concentric layout, which carries on Tannoy's long-standing point-source approach. Owners report a strong midrange presence. Average power handling runs from 5 to 500 watts, so it holds up in dynamic studio or broadcast work. Sensitivity is 93dB, so it gets loud without needing a huge amplifier. Low-frequency extension reaches down to 50Hz. That's credible bass for its era, but it doesn't go into sub-bass territory.
Despite the professional aim, the SRM12X ended up in private listening rooms, prized for its coherent soundstage and the Tannoy vocal clarity. It weighs 30 kg (68 lbs), so installing one is a real job. The cabinet design isn't detailed in the official specs. It houses engineering focused on durability and acoustic integrity, consistent with Tannoy's studio-grade builds of the period.
Specifications
| Manufacturer | Tannoy |
| Model | SRM12X |
| Type | Passive Monitor |
| Driver Configuration | Two-Way Dual Concentric |
| Driver Size | 12 inch |
| Sensitivity | 93dB |
| Frequency Response (low-end) | 50Hz |
| Power Handling | 5-500W average |
Key Features
12-Inch Dual Concentric Driver Array
The heart of the SRM12X is its concentric driver. The tweeter sits coaxially in the center of the 12-inch woofer, making a single point source for the high and midrange frequencies. This minimizes phase distortion and time alignment problems, and gives a tightly focused stereo image that studio engineers valued for accurate monitoring. The integration demands precise alignment. Aging units may suffer from misalignment or dome deterioration, but when properly maintained, the coherence across the midband remains striking.
Two-Way Passive Crossover Network
The internal crossover splits the signal between the low and high-frequency drivers. Details such as crossover frequency or component quality are not documented. User reports suggest the original crossovers can degrade over time. Some owners have noted that replacing them with modern equivalents, along with reconing the drivers, can significantly improve performance. Sourcing or designing suitable replacements is reportedly difficult, which limits restoration efforts.
High Average Power Handling
Rated to handle between 5 and 500 watts average, the SRM12X was built to withstand prolonged high-level operation without thermal failure. That wide tolerance suited environments where consistent output was critical, like broadcast control rooms or mastering suites. The build reflects this, with . There is no detailed impedance data, so amplifier matching requires caution, especially given the age of the components.
Collectibility & Value
The SRM12X has a cult following among vintage monitor collectors and Tannoy loyalists. In March 2026, units were listed on HiFiShark for €850 in Italy and €2,000 in Romania, a big spread that depends on condition and market. Spare parts, including original grill sets for both driver and port, turn up now and then on eBay, which suggests a small but active restoration community. Maintenance problems include sourcing reliable crossover designs and the need for reconing, which is not a straightforward DIY task. There are no documented original pricing figures, and long-term reliability data remains anecdotal.
eBay Listings
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