Sony SS-2800 (1968)

Name: Sony ss-2800
Brand: Sony

Three-way bookshelf speaker system developed for solid-state amplifiers, featuring independent level controls and high-efficiency design.

Overview

The Sony SS-2800 is a 3-way, 3-speaker bass reflex system of bookshelf type, manufactured by Sony Corporation in Tokyo. Released in 1968, it was designed specifically for use with solid-state amplifiers. The system features a wooden cabinet finished in Eurasian teak, with high-density homogen used for internal plating. It is part of Sony's "SS" series of speaker systems.

Specifications

System Type	3-Way Bass Reflex System
Frequency Response	40 Hz to 20 kHz
Sensitivity	97 dB/W
Impedance	8 Ω
Power Handling	20 W (50 W max.)
Crossover Frequencies	600 Hz, 6 kHz
Level Control	3-step switching: -4dB, flat, +4dB; independent for mid and high frequencies
Woofer	1x 250 mm cone type (2" voice coil, AlNiCo magnet)
Midrange	1x 170 mm cone type (Diatone P-610, likely AlNiCo magnet)
Tweeter	1x 50 mm horn type (Technics 5HH17)
Dimensions	350 mm (W) × 590 mm (H) × 230 mm (D)
Weight	16 kg
Original Price	¥24,800 per unit

Design

The SS-2800 uses a bass reflex enclosure with a crossover network that includes independent three-stage switching for mid and high frequencies. The woofer features a 2" voice coil and a large AlNiCo magnet, while the crossover employs large air-core coils. The midrange driver is the Diatone P-610, a lightweight unit with transparent dustcaps and possibly leather surrounds. The cabinet is constructed from veneered chipboard with a Eurasian teak finish.

Context

The SS-2800 is described as a "classic" Sony speaker and is part of Sony's "SS" series. It was noted for high efficiency and suitability with low-to-mid powered systems, though Sony was not widely regarded in the speaker market at the time.

Market

Common maintenance includes replacing crossover capacitors, particularly the 3.3 and 4.7 MFD units, to protect the tweeter. Some users report the need for recapping or new tweeters, and the midrange drivers may suffer from deteriorating foam. Due to their build quality and rarity, alterations beyond necessary repairs are discouraged.