Sansui SP-300
A Japanese-made floor-standing loudspeaker system designed for natural, immersive sound reproduction.
Overview
The Sansui SP-300 is a floor-type loudspeaker system. It is a 3-way, 4-driver bass reflex design, meant to give natural sound with the listener hardly aware of the speakers at all. It was sold individually, and one unit cost ¥52,300 in January 1967. It belongs to a larger family of Sansui speakers that includes the SP-1000, SP-1500, SP-2000, and later SP-X series models.
Specifications
| Type | 3-way, 4-driver bass reflex speaker system |
| Low frequency unit | 30 cm cone type |
| Middle range unit | Horn type |
| High frequency unit | Horn type x2 |
| Frequency response | 30Hz to 20kHz (conflicting sources: 35Hz to 20,000Hz) |
| Impedance | 8 Ω |
| Maximum input power | 50W |
| Sound pressure level | 104dB/W |
| Crossover frequencies | 1000 Hz, 6000 Hz (12dB/oct.) |
| Enclosure type | Bass-reflex system using a pipe duct |
| Dimensions (W×H×D) | 460 × 700 × 420 mm |
| Weight | 35.6kg |
| Cabinet material | Chip board 21 mm thick, walnut finish |
Design
The woofer is a 30 cm cone type with a slightly thick, hard paper cone and a cross-roll surround. Its magnetic circuit uses eight magnets and reaches a flux density of 13,600 gauss. The midrange is a horn-type driver with a hard duralumin diaphragm and a full-scale screwdriver unit with eight magnets. Two square horn-type units handle the high frequencies. The crossover uses specially designed 12dB/octave coils based on Sansui's transformer technology. Level controls adjust the mid and high bands through 3-point tap-type selectors. Sound-absorbing material inside the cabinet reduces unwanted resonance.
Market
Used pairs of Sansui SP-300 speakers have sold for $374.95, and one buyer reported picking up a pair at a garage sale for $30. Degraded woofer surrounds are a common problem. Users report that replacing them improves the sound significantly.
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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