Trident TSM-40/24
A big-frame British console that shows up in the classifieds more often than in the history books — and the asking prices tell you plenty.
Overview
The TSM-40/24 is one of those consoles you learn about sideways: not from a brochure, but from the used-gear columns where it keeps resurfacing decade after decade. The designation itself is the giveaway — a 40-input frame fitted with 24 channels, the kind of modular, expandable architecture that British console builders favored because studios bought frames they could grow into. DB Magazine (June 1980, p.51) described the TSM Series as featuring 24 inputs with a fully removable modular patchbay, which tells you the design philosophy in a sentence: serviceable, reconfigurable, built to be worked on rather than sealed shut.
What makes the TSM-40/24 interesting to collectors is less any single specification than the paper trail it left. This is a console that turns up in studio inventories on both sides of the Atlantic, in classified ads spanning the better part of two decades, and in at least one documented installation where it was the centerpiece of a working room. That kind of persistence says something a spec sheet can't.
A Working Console, Not a Museum Piece
The same account describes the room as having a live feel suited to rock and roll bands while staying flexible enough for almost any session — a characterization that reflects on the console's role as much as the studio's acoustics. A board that anchors a room like that is doing real work, not sitting behind glass.
Collectors note that the TSM frame came in several fitted configurations over the years. The 40/24 designation appears repeatedly in classified listings, but so do variants like a 40/24/32 and a 32-way frame fitted 28/24 — evidence that these consoles were ordered to spec and reconfigured as rooms changed hands. That modularity is a double-edged sword today: it means no two surviving TSM-40/24s are necessarily identical, which complicates valuation but also means a buyer can sometimes find exactly the channel count they need.
The Used Market Tells the Story
Here's where the TSM-40/24 gets genuinely fascinating, because the classified ads trace its depreciation in real money. In Studio Sound (July 1982, p.25), a TSM 40/24/40 described as three years old carried an asking price of £25,000 — a substantial figure for a used console at the time, and a hint at what these cost new.
By the late 1980s the picture shifts. A 1987 listing in Studio Sound (May 1987, p.88) shows a TRIDENT TSM 40-24 at £50,000, though context matters: that same page lists a Neve 8068 at £48,000 and a Neve 8048 at £60,000, so the Trident was priced in genuinely elite company. Whether that figure reflects condition, configuration, or simply an optimistic seller is impossible to say from the ad alone — classified prices are asking prices, not sale prices, and large-format consoles have always been negotiable.
By 1990 the ask had softened considerably. Later listings in the 1990s show TSM variants going to "price on application" or "call for details," the classic signal that a seller no longer knows what the market will bear.
What Buyers Should Know
The honest caveat with any console of this vintage is that the documented record is thin on the things that matter most to a buyer today: exact channel strip topology, EQ design, power supply requirements, and weight. The available period sources confirm the frame configurations and the modular patchbay design, but they don't give a service manual's worth of detail. Anyone seriously considering a TSM-40/24 should expect to source documentation separately and budget for a technician familiar with British large-format desks of the era.
The removable modular patchbay that DB Magazine highlighted is genuinely good news for maintenance — modules come out, which makes recapping and repair far more tractable than on consoles with hard-wired everything. But a 40-input frame is a physical commitment: it needs space, power, and a room that can justify it. These are not consoles you buy casually.
Collectors note that the TSM line sits in an interesting spot within Trident's output. It's not the A Series or the Series 80 that dominate collector conversation, but it's a legitimate large-format British console with documented commercial installations and a paper trail of sales stretching across two decades. For someone who wants a serious vintage desk without paying Neve money, the TSM-40/24 is worth knowing about — provided they go in with eyes open about documentation and condition.
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