OPTONICA CP-2000

Commentary

This is a bookshelf type speaker system that uses B & B (Beating Pulp and Excellent Beat Fiber).

A 25 cm cone type woofer using B & B as a diaphragm is mounted in the low range.
The B & B Diaphragm is a mixture of traditional Northern European pulp and tough Japanese paper with special treatment. It realizes cone paper with a wide piston range with less distortion in the low frequency range.
In addition, a low-electric-resistance AL short ring (58 φ x42 φ x1mm) is installed at the bottom of the pole piece of the magnetic circuit. When a large input is input to the woofer, out of the AC magnetic flux generated from the voice coil, the magnetic flux circulating through the magnetic circuit is canceled, thereby suppressing the generation of second harmonic distortion.

A 2.4 cm soft dome type tweeter is installed in the high range.
This unit uses a magnetic circuit with a magnetic flux density of 15,000 gauss.

Equipped with a continuously variable level control, the high range level can be adjusted.

The network section is equipped with a reactance compensation circuit.
This circuit consists of a capacitor and a resistor inserted in parallel with the woofer to compensate for the increased impedance of the woofer as the frequency increases, resulting in more ideal transfer characteristics and better transient characteristics.

In order to improve the diffraction effect, the protrusion on the edge of the baffle plate, which was provided in the conventional baffle, has been removed from the enclosure.

Model Rating

Method	2-Way, 2-Speaker, Airtight Type, Bookshelf Type
Units used, etc.	For low band : 25 cm cone type For high-pass : 2.4 cm dome type
Playback frequency band	40 Hz to 20 kHz
Sound pressure level	90dB/W
Impedance	8 Ω
Maximum allowable input	40W(MPO)
Crossover frequency	2 kHz (LC Type 12dB/oct)
Level control	High frequency continuous variable type
Internal volume	35 liters
External dimensions	Width 310x Height 530x Depth 315 mm
Weight	13.5kg