Tannoy 2528 (1975)

One driver delivers the whole picture - coherent, centered, and startlingly real.

Overview

The Tannoy 2528 isn’t a speaker you just plug in and forget. It’s a 10-inch Dual Concentric driver—the beating heart of a generation of monitors that refused to compromise. Built in 1975, it was engineered for broadcast and studio environments where clarity and accuracy weren’t just preferred, they were mandatory. And it delivered. So much so that it became a benchmark in audio monitoring, a term not tossed around lightly in those circles. This wasn’t gear for the casual listener; it was for engineers who needed to hear every breath, every string scrape, every subtle phase shift. And they did—through the 2528.

Tannoy didn't just slap a tweeter on a woofer and call it coaxial. The 2528 uses true Dual Concentric architecture, where the high-frequency section sits physically and acoustically at the center of the low-frequency cone. That alignment means sound arrives at your ears in time and phase, which removes the off-axis smearing you get with conventional two-way designs. Owners report a focused soundstage, because the source is literally a single point.

A 2-inch pepperpot tweeter sits in the middle, fed by integrated high-frequency horns. The assembly rides on a cast aluminum frame with a rubber surround, which is built to last but not immune to age. It's an 8-ohm driver, so it pairs easily with vintage or modern amplifiers. The magnet is a ferrite single magnet. That's less exotic than alnico, but more stable and cost-effective for its time.

It went into several Tannoy enclosures: the Ascot T145, Chester T165, Dorset T185, and Mayfair T225, all produced between 1978 and 1982. One user described their Ascot speakers with 2528 drivers as “superb to my ears - especially for jazz and vocals.” Another wanted more bass depth than the factory spec claimed (around 45Hz, though skepticism remains), and still valued the “point-source” sound enough to keep working on the design. Some owners bi-amp or add a ribbon super-tweeter. The core appeal stays the same: a single driver doing the work of two.

Specifications

Driver size	10 inch
Impedance	8 Ohm
Driver type	Dual Concentric
Tweeter type	pepperpot tweeter
Magnet type	ferrite single magnet
High Frequency type	post 1979
High Frequency Size	2"
Outside diameter	approx. 25.5 cm
Installation diameter	approx. 22.5 cm
Installation depth	approx. 13.5 cm
Diagonal hole spacing	approx. 27 cm
Frame material	cast aluminum
Surround material	rubber
Sensitivity	high sensitivity

Key Features

Dual Concentric Design

The defining trait of the 2528 is its Dual Concentric layout, a coaxial design where the high-frequency horn sits directly at the center of the low-frequency cone. By aligning the acoustic centers of both drivers, Tannoy made highs and mids arrive at the listener's ears simultaneously, preserving time alignment and phase coherence. The soundstage doesn't collapse when you step off-axis. Engineers favored these in control rooms because what you heard in the sweet spot was reliable, and what you heard outside it didn't lie.

Pepperpot Tweeter & Integrated Horns

The high-frequency section is built around the pepperpot tweeter, a small, dome-like compression driver with a perforated faceplate that gives it its name. It's fed by integrated high-frequency horns, which help control dispersion and boost efficiency. This design was characteristic of Tannoy's post-1979 HF units, and in the 2528 it's paired with a 2-inch throat. The horn loading lets the tweeter play loud and clean, which adds to the driver's high sensitivity. It's not a silky silk dome. It's dynamic and immediate.

Build & Materials

The 2528 is built like a studio workhorse. The cast aluminum frame provides rigidity and heat dissipation. The rubber surround stays flexible long-term and doesn't dry out as quickly as older foam types. The ferrite single magnet keeps things stable and avoids the corrosion issues sometimes seen in older alnico designs. The materials are durable and the driver is serviceable. These drivers do age, though, especially at the edges.

Historical Context

The Tannoy 2528 was born in 1975, when broadcast studios and mastering houses demanded accuracy above all. It was designed explicitly for those environments, where a flawed monitor could mean a flawed mix. Its reputation grew quickly, and it became a benchmark in audio monitoring, a standard against which others were measured.

It's part of Tannoy's “Monitor Gold” series, a line that also included 15-inch and 12-inch versions, each tailored for different room sizes and applications. The 2528 brought that same philosophy down to a 10-inch format, compact enough for smaller rooms but still powerful enough for full-range performance. It wasn't a downsized compromise. It was a focused evolution of Tannoy's point-source ideal.

Collectibility & Value

The 2528 is collectible less as a standalone driver and more as a key component in vintage Tannoy systems. Its value today is tied to the condition of the drivers and the availability of service parts. One known failure point is the dustcap. If it's badly glued, it can allow the bass voice coil to contact the magnet assembly, leading to distorted or “not ok” sound. Another issue is voice coil damage, meaning burning or discoloration from over-powering or DC offset due to a faulty amplifier. These aren't death sentences, but they're common enough that repair is part of ownership.

Reconing is a known maintenance path. The bass cone can be replaced and recentered, the coil cleaned and sealed, and the dustcap reattached or swapped. A recone kit exists for the 2528, and a New Old Stock (NOS) genuine Tannoy recone kit was listed for CA$220 on September 24, 2025. That's not cheap. NOS Tannoy #1004 crossovers are also available on the market. They're the correct units for systems using the 2528, and they're sometimes sold in pairs.

Original pricing and current resale values for the driver itself remain unconfirmed. Functional, well-maintained 2528s in working cabinets, especially Chester or Ascot models, are the real prize.