CORAL BL-20D

Commentary

A backload horn type speaker system using BETA-8.

The unit uses BETA-8 which is a 20 cm cone type full range unit.

The enclosure uses a CW back-loading horn, which is a rear-loaded horn type with a constant lateral dimension from the throat to the opening of the horn. The horn flares by changing the longitudinal dimension of the cross section.
Cork with beautiful grain is used for wood.

A high adjustment terminal is mounted on the rear terminal.
If you need more treble, you can adjust it by removing the ground wire connecting the high adjustment terminal and negative terminal.

Model Rating

Method	2-way, 2-speaker, CW back-load horn system ・ Floor type
Units Used	For All Bands : 20 cm Cone Type (BETA-8)
Impedance	8 Ω
Program source input	30W
Output sound pressure level	100 dB (New JIS)
External dimensions	Width 400x Height 880x Depth 400 mm
Weight	30.5kg

BETA-8 rating

Playback frequency band	30 Hz to 20 kHz
Lowest resonance frequency	30 Hz to 45 Hz
Mechanical crossover	6kHz
Output sound pressure level	95dB
Impedance	8 Ω
Effective mass of vibration system	8.5g
Qo	0.5(40Hz)
Magnetic flux density	15,500gauss