Audio Database

SP-2005
Commentary

A bookshelf type speaker system that employs a multi-direction system.

In the multi-direction system, the directivity of the medium and high sound speaker unit is crossed to the inside to expand the listening area. At the same time, the combination of sound waves and waves is enriched to create an acoustic interference pattern, and the reproduction of natural presence in the raw sound field is attempted.

A 30 cm cone type woofer is installed in the low range.
This unit uses a special pre-cone and a mechanical filter installed between the cone and bobbin. It has a characteristic that the high frequency band rapidly attenuates at a fixed frequency without passing through a network. This allows the woofer to be connected directly to the amplifier without a network, thus reducing the disturbance of characteristics.

In the middle area, it is equipped with two 12.5 cm cone type skokers adopting a newly developed concave aluminum radiator.
The voice coil is made of copper coated aluminum wire (CCAW), which is light and has good conductivity. The screen protector diffuses the high-frequency band to achieve a mellow sound quality. A large sealed cover is attached to the back of the voice coil to prevent rear interference with the woofer.
There is enough acetate sound-absorbing material inside the cover.

Two types of 2.5 cm dome type tweeters equipped with a short horn with high aperture ratio are installed in the high range.
Hard aluminum is used for the diaphragm of one tweeter and metalized Mylar is used for the other, so that the difference in hardness and mass between the two materials can be seen as the difference in volume and rise in terms of sound quality, and a high sound without any peculiarity is reproduced.

Coils using E-type ferrite e-type ferrite core to improve the reduction of distortion, high-frequency loss and damping factor.
In addition, it is equipped with a level control, so that the middle and high sound can be adjusted by 3 steps with ± 3 db each.
2-way and 3-way ECS terminals are included for easy switching between full range l, 2-way and 3-way. Safety circuit is mounted.

The enclosure uses a bass reflex system with pipe ducts. Furthermore, by changing the angle of the panel in front of the duct, three types of bass reproduction can be selected: sealed, dumped, and bass-reflex, allowing bass reproduction to suit the room.
The finish is a walnut open pore finish.

Model Rating
Method 3-way, 5-speaker, variable bass reflex system, bookshelf type
Unit For low band : 30 cm cone type
For Medium Range : 12.5 cm Cone Type x2
For High Pass : 2.5 cm Aluminum Dome Type
2.5 cm Mylar dome type
Frequency characteristic 27 Hz to 20 kHz
35 Hz ~ 20 kHz (Anechoic Room)
Maximum allowable input 50W
Impedance 8 Ω
Output sound pressure level 96dB/W/m (New JIS)
Crossover frequency 700 Hz, 6500 Hz (12dB/oct.)
Level control Mid-range : 3 steps (+ 3 db, Flat, -3dB)
Treble : 3 steps (+ 3 db, Flat, -3dB)
External dimensions Width 411x Height 640x Depth 285 mm
Weight 23.5kg