Western Electric 728B

A twelve-inch direct radiator that broadcast engineers spec'd by the roomful, and that collectors now treat like a holy relic.

Overview

Most speakers are sold. The Western Electric 728B was specified. It is a 12-inch direct radiator - one source calls it a 12-inch full-range unit - built by Western Electric Co., Inc., the company established in 1869 and later re-established in 1996 for the exclusive manufacture of electron tubes and high fidelity. Collectors hold it in high regard. One enthusiast source calls it a "holy grail speaker," and the broader sentiment is that it commands a reverence few drivers earn.

The 728B is interesting for how it was deployed. A 1947 broadcast-industry item describes distributing 728B loudspeakers generously through the areas to be served, with each individual speaker running at a low power level, so that each room seemed to the listener to be filled with music, providing a continuously pleasing background for eating. Contemporary trade coverage in Audio (October 1948, p.14) positioned the 728B as ideal for installations requiring extra high power, listing a frequency response of 60 to 10,000 cycles. The idea was many speakers, each loafing along, covering a space evenly rather than one big box aimed at a corner.

The 728B sits in Western Electric's golden age of acoustic ambition, and it is one of the few speakers from that time that survive. The ones that remain are old enough that their condition matters as much as their sound.

Key Features

Twelve Inches of Pre-War American Engineering

The 728B is described as twelve inches of pre-war American engineering, and as a "12-inch beast." One Japanese source goes further and calls it the summit of 12-inch full-range units. A listing title gives the diameter as 12.5 inches, and a measurement from westernlabo.net puts the unit at 317 mm diameter by 95 mm depth. Treat the exact figure with some caution. 12-inch nominal, 12.5-inch measured and 317 mm are close but not identical, which is typical of hand-measured vintage drivers.

Full-Range Coverage, and the 755A Comparison

One source describes the 728B as a 12-inch full-range unit. The most useful comparison comes from westernlabo.net: the smaller 755A (a 20 cm unit) is the more popular Western Electric driver, but the 755A lacks mid-low range, while the 728B has good balance. So the 728B gives up the 755A's popularity for a fuller, more even sound. For a Western Electric system where the midbass matters, the source points to this driver.

Voice Coil Rub — the Known Companion

Owners report potential voice coil rub, a gritty whisper in the midrange that signals something is wrong. The documented causes are a sagging cone, a shifted magnetic assembly, or a frame bent by age and too much volume. None of these are exotic. It is ordinary physics for a heavy cone hanging under gravity for decades. Know about it before buying, because it shapes both the repair and the value discussion below.

Historical Context

Western Electric's corporate history is unusual: established in 1869, and later re-established in 1996 for the exclusive manufacture of electron tubes and high fidelity. The 728B belongs to the earlier era. Its documented use is specific. A 1947 item describes the 728B being distributed generously through the areas to be served in broadcast and dining contexts, each speaker running at a low power level to fill rooms with continuous background music. That was a working installation, not a showroom demo.

Dating the 728B precisely is harder than it should be. Listing titles have claimed 1948 and 1949. One source attributes release to Altec in the early 1950s. Another listing says "Rare 1970." The most defensible reading is late 1940s to early 1950s, with 1947 documented in-service use. The year 1940 appears only in a meta description and is not stated in any body text, so flag it as unverified. For a museum label that needs a hard date, don't use one.

The 728B also resembles a broader Western Electric catalog of the period: the 755A and 756A direct radiators, the 754A, and the multi-unit systems built around them. The 755A comparison above is the one that matters to a buyer choosing between them.

Collectibility & Value

Originality is everything. A reconed 728B is often seen as diminished, however well the repair was done. The market treats these like unrestored vintage watches, where the patina and the factory windings are part of the asset. That puts buyers in an awkward spot. The speaker's most common failure (voice coil rub) is the one whose proper fix, reconing, described as invasive surgery, destroys the value. Owners have tried wetting the cone and spider with solvent and carefully applying pressure to reverse the sag. Others simply rotate the speaker in its cabinet. Reconing is the last resort.

Asking prices run high: $2,800 for a single unit, $8,499.99 for a pair, $8,500 for a mint listing, and $3,750 on one dealer page. Completed eBay sales are more sober: a high of $4,560, a median of $2,500, a low of $575, at roughly three units a month. Sellers anchor to the dream price and buyers pay the market price. Budget for the median, not the ask. Spare parts turn up too: replacement cone paper kits around $550, original instruction bulletins around $25, and logo water-slide decals for single digits.

Demand is global and concentrated. Japan, Hong Kong, and Korea drive the market, and the "Western Electric Sound" remains the subject of lyrical praise in audiophile magazines there. Anecdotally, a Korean dealer was reported in the early 1990s to have paid a truly indecent sum for Western Electric 274A tubes. For the 728B, buy the most original example you can find and afford, and be prepared to live with the risk of voice coil rub rather than eliminating it.

Market Value

┌──────────────────────────────────────────────────────────────────────────┐
│ WESTERN ELECTRIC 728B                                           Nov 2026 │
├──────────────────────────────────────────────────────────────────────────┤
│ High      $4,560                                  Latest          $2,500 │
│ Median    $2,500                                  Trend                — │
│ Low       $575                                    Volume           ~3/mo │
├──────────────────────────────────────────────────────────────────────────┤
│ $5,000 ┤                                                                 │
│        │.                                                                │
│        │                                                                 │
│ $3,071 ┤                                                                 │
│        │                                                                .│
│        │                                                                 │
│        │                                                                 │
│   $500 ┤                 .                                               │
│        ├─────────────────────────────────────────────────────────────────│
│    vol │█                █                                              █│
│        └─────────────────────────────────────────────────────────────────│
│         2026-03                      2026-04                      2026-04│
└──────────────────────────────────────────────────────────────────────────┘

eBay completed sales. Excludes accessories, parts, and non-working units. Hover points for details.