B&W CDM7SE
¥ 100,000 (1 unit, released in 1998)
Commentary
A Special Edition Series tall boy speaker system.
A 16.5 cm cone type woofer is installed in the low range.
A paper / Kevlar fiber cone is used for the diaphragm, and a center equalizer is installed in the center of the voice coil instead of a dust cap. By improving the diffusion in the middle and high range, the connection between drive units becomes smoother.
The mid-range is equipped with a 16.5 cm cone type mid-range.
The diaphragm of this unit is made of Kevlar composite cone, which attenuates standing waves by making the movement of refracted sound waves through the material uneven, minimizing the coloring of sound.
Like the woofer, a center equalizer is installed in the center of the voice coil instead of a dust cap.
A 2.6 cm dome-shaped tweeter is installed in the high range.
Metal diaphragm is used for vibration plate, and cooling effect is enhanced by magnetic fluid.
The network section is arranged on separate boards for woofer and tweeter to eliminate mutual interference between each circuit.
In the unit layout, the tweeter section is independent structure, and the woofer and tweeter are arranged in linear phase so that sound can reach simultaneously.
The enclosure uses a bass reflex system with rounded corners to minimize the diffraction of sound waves.
There were 3 kinds of variations such as red ash, black ash and cherry for finishing of the exterior.
A speaker terminal for bi-wiring and bi-amplifier connections is used.
Model Rating
Method | 3-Way, 3-Speaker, Bass Reflex System, Tall Boy Type |
Unit | For low band : 16.5 cm cone type For Medium Range : 16.5 cm Cone Type For high-pass : 2.6 cm dome type |
Frequency characteristic | 30 Hz to 30 kHz -6dB |
Frequency response | 40 Hz ~ 20 kHz ± 3 dB (free field) |
Directional | Longitudinal deviation ± 2dB10 degrees or more Lateral deviation ± 2dB40 degrees or more |
Output sound pressure level | 90dB/2.83V/m |
Distortion factor | Second and third harmonic distortion factor : less than 1% (45 Hz to 20 kHz, 90 dB, 1m) |
Nominal impedance | 8 Ω |
Crossover frequency | 150 Hz, 3 kHz |
Compatible amplifier output | 30W ~ 150W |
External dimensions | Width 220x Height 370x Depth 274 mm |
Weight | 18.5kg |