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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





Boston Acoustics A40 (1985)

In our continuing effort to lower cost of high performance stereo systems, we are pleased to announce the introduction of the Bosto Acoustics A40. Housed in a 343x210x197 mm deep wood-grained vinyl enclosure, the A40 uses a newly-designed 170 mm woofer manufactured by Boston Acoustics and a ferrofluid-damped 19 mm tweeter.

Tha A40 is ideal for moderate-sized rooms, dorms, dens, bedrooms, you name it - either as a primary or extension speaker. its imaging capability is unique in its price range, and its dispersion is exceptional. This remarkable performance makes the A40 a stiff competitor to anything at or near its price, and its compact size permits a wide range of placement options.

Specification

Drivers:

6½" (170 mm) long throw woofer,

¾" (19 mm) ferrofluid cooling tweeter

Frequency response: 68 - 20,000 Hz, ±3 dB

Sensitivity: 88,5 dB at 1 watt/1 m

Impedance: 8Ω (nominal)

Crossover frequency: 3500 Hz

Recommended power : 5 to40 watts

Dimension: 343 x 210 x 197 mm (13½" x 8¼" x 7¾")

Weight: 4,1 kg (9 lbs)

Cabinet finish: wood grain vinyl over non resonant particle board

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