Bowers & Wilkins DM640

Enclosure Type: 3 way ported.

Recommended Amplifier:           25 – 150 Watts.

Frequency Response:    46Hz to 20kHz.

Crossover Frequency:   300Hz and 3kHz.

Sensitivity:         91dB.

Nominal Impedance:     8 Ohms.

Drivers: 1 x 26mm metal dome.

1 x 160mm Kevlar cone.

2 x 200mm Cobex cone.

Dimensions:      236 x 965 x 407mm (Width x Height x Depth).

Weight:               24kg.

Year:     1990.