Sony SS-2250 (c. 1975)

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

Overview

The Sony SS-2250 is a 3-way passive loudspeaker system produced around 1975 and made in Japan. It was marketed as a high-fidelity bookshelf speaker with an airtight sealed-box design. The system uses Sony's Carbocon driver technology, which incorporates a lightweight, rigid cone material for improved sound reproduction. The speaker features a 10" woofer, a 6 cm mid-range unit, and a horn-type tweeter. It has a sensitivity of 91 dB/W/m and is rated for 50W maximum input (some sources cite 120W) with an 8 Ω impedance. The cabinet comes in a Georgia Walnut finish, and a variant, the SS-2250M, was offered 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 SS-2250 uses Carbocon driver technology, with a special lightweight and flexible edge on the woofer designed to reduce unwanted mid-range distortion caused by edge deformation. The cabinet is built as an airtight sealed box, contributing to tight bass response.

Market

The SS-2250 is considered rare and has appeared in recent listings with asking prices such as CAD $100.00. Other international listings show varied pricing, including Php 3,000 and CLP215,000 to CLP235,000, reflecting regional collector interest.

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