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What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.



H.H. Scott '59





B & W CDM 2SE

CDM 2SE

Stand - mount/Bookshelf loudspeaker system


The CDM 2SE is ideal for the smaller room, as it offers superb sound from a compact

enclosure.

An integral part of the CDM 2SE is the use of rounded baffle edges, which reduce the

effect known as diffraction. In normal cabinet construction, sound waves from the drive units

radiate toward both the listener and the cabinet edges. If the sound waves meet sharp

edges, they re-radiate towards the listener and, due to time delay, interfere with and blur

the sound coming directly from the drive unit. Rounding the edges reduces this time

smearing, giving you the listener a clearer sound and better defined stereo image.

Technical highlights

Kevlar®: B&W developed and patented the method of using Kevlar® for

loudspeaker cones to reduce unwanted standing waves. DuPont originally

created Kevlar® for use in bulletproof vests.

Description: 2-way 4th-order vented-box system

Drive units:

1x 165mm (6½ in) woven Kevlar®cone bass/midrange

1x 25mm (1in) alloy dome high-frequency

F requency range: -6 dB at 51 Hz and 30 kHz

F requency response: 65 Hz – 20 kHz ±3 dB on reference axis

Dispersion:

Within 2 dB of response onreference axis

Horizontal: over 40° arc

Vertical: over 10° arc

Sensitivity: 87 dB spl (2.83V, 1m)

Harmonic distortion: 2nd & 3rd harmonics < 1% 100 Hz – 20 kHz (90 dB spl, 1 m)

Nominal impedance: 8 W (minimum 4.5 W)

C rossover frequency: 3 kHz

Power handling: 30 W – 120 W continuous into 8W on unclipped programme

Max. recommended cable impedance: 0.3 W

Dimensions:

Height : 316 mm (12¼ in)

Width : 220 mm (8⅝ in)

Depth : 242 mm (9½ in)

Net Weight: 7.0 kg (15.4 lb)

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