Sony SS-2250 (c. 1975)

A Japanese-made 3-way passive bookshelf speaker from the mid-1970s with Carbocon drivers and a sealed enclosure.

Overview

The Sony SS-2250 is a 3-way passive loudspeaker system made in Japan around 1975. Sony sold it as a high-fidelity bookshelf speaker with an airtight sealed-box design. The drivers use Sony's Carbocon technology, which puts a lightweight, rigid material in the cone for better sound reproduction. You get a 10" woofer, a 6 cm mid-range unit and a horn-type tweeter. Sensitivity is 91 dB/W/m, impedance is 8 Ω, and maximum input is rated at 50W (some sources cite 120W). The cabinet has a Georgia Walnut finish. A variant, the SS-2250M, came with a different finish.

Specifications

Type	3-Way, 3-Speaker, Airtight Type, Bookshelf Type
Enclosure	Sealed Box
Woofer	25 cm cone type (10")
Mid-range unit	6 cm cone type
High-frequency unit	Horn Type
Frequency Response	45 Hz ~ 20000 Hz
Sensitivity	91dB/W/m
Impedance	8 Ω
Power rating	50W (some sources cite 120W)
Crossover frequencies	2300 Hz, 8000 Hz
Dimensions	Width 345 x Height 650 x Depth 290 mm
Weight	12.5kg
Finish	Georgia Walnut style
Manufacturer	Sony
Country of manufacture	Made in Japan
Original price	¥53,000 (set of two, circa 1975)

Design

The woofer has a special lightweight, flexible edge. It is there to reduce mid-range distortion caused by edge deformation. The cabinet is an airtight sealed box, which helps keep the bass tight.

Market

The SS-2250 is considered rare. Recent listings have shown asking prices such as CAD $100.00. International listings vary: Php 3,000 in one case, and CLP215,000 to CLP235,000 in another, which reflects regional collector interest.

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