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





Sony APM-77 W

A bookshelf-type 3-way speaker system that's all APM, with performance comparable to floor-standing studio monitors. The flat and square woofer is driven by 4 independent voice coils with direct dual-surface drive for outstanding low frequency response and resolution.
Maximum power handling capacity of 200 W.

 The Sony APM-77 is the original "affordable" APM loudspeaker. It sported a stark grey finish and was thus quite futuristic. However, as the 1980s turned out to be far more conventional than expected, it is the later APM-77W (W for Wood) that is well remembered. Unfortunately, wood or not, the APM-77 didn't sell that well although it does provide a very balanced sound.
APM drivers are made of an aluminium honeycomb mainframe with ultra-thin aluminium covers - 100x more rigid than paper cones. The japanese magazine Audio Accessory often used Sony's APM loudspeakers for its reviews.
Specifications:
System:  3-way, Bass-reflex
Speakers:
Woofer :  530 cm² APM
Midrange :  27 cm² APM
Tweeter :  7 cm² APM
Impedance:  6 Ω
Power Handling Capacity [Nominal/Maximum] :  100 / 200 W
Sensitivity:  90 dB/W/m
Frequency Range:  28 - 30,000 Hz
Dimensions (W x H x D):  405 x 745 x 325 mm
Weight:  32 kg


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