Sansui SP-6000 (1975)

The Sansui SP-6000 is a three-way, bass-reflex bookshelf speaker from 1975. It's a big one, at 24 kg and 681 mm tall. It uses a 30.5 cm cone woofer, a 16.5 cm cone midrange, and a 6.4 cm horn-type tweeter. The tweeter has a rear-drive inverted dome diaphragm made of super-hard duralumin. The crossover is a 3-way, 12 dB/octave LC-balanced network set at 800 Hz and 7 kHz, with click-type level controls for the squawker and tweeter.

The enclosure is hard acoustic particle board and lauan plywood, reinforced with spline joints, hozo (mortise) assembly, and angle blocks. The finish is natural walnut with an open-pore finish. The driver layout is symmetrical to improve directional performance in listening positions. The woofer has a lightweight pulp cone based on coniferous wood and a large Alnico magnet. The midrange driver has a curved cone with multiple curvatures and a corrugated free edge to reduce distortion.

Rated specs: 8 Ω impedance, 60W maximum input, 93 dB/W sensitivity (New JIS), and a frequency range of 30 Hz to 20 kHz. Dimensions are 383 × 681 × 323 mm (W×H×D). The ¥59,800 price was per single unit.

Documentation on the SP-6000 is thin beyond its specifications. A December 1975 Japanese catalog pairs it with the SP-4000. A Russian-language source mentions it as a candidate for listening to jazz vocals when paired with a Sansui AU-7900 amplifier, alongside the Pioneer CS-E700 and Celestion Ditton 33. One sold listing on a hifi forum described a pair in "near mint cosmetic condition" in Ipoh, Malaysia. No professional reviews, market value data, or common maintenance issues are documented.

• Type: 3-way, 3-speaker, bass-reflex bookshelf
• Drivers: 30.5 cm cone woofer, 16.5 cm cone midrange, 6.4 cm horn tweeter
• Crossover: 800 Hz / 7 kHz, 12 dB/oct.
• Impedance: 8 Ω
• Max input: 60W
• Sensitivity: 93 dB/W (New JIS)
• Frequency range: 30 Hz – 20 kHz
• Weight: 24.0 kg

eBay Listings

Speco/CSI SP-6000 Single Center In-Wall 2-Way Speaker 6.5" W

$79.95

As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.

Related Models

• Sansui 2000A (1968-1970)
• Sansui 5000X (1969-1971)
• Sansui 6060 (1975-1977)
• Sansui 7000X
• Sansui 881 (1974-1976)
• Braun AUDIO-1 (1965)
• Braun AUDIO-250 (1965)
• Magnavox Component Systems (1972)
• Acoustic Research AR (1967-1976)
• Acoustic Research 11