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





ADS L420 loudspeakers


Who is ADS?
Analog and Digital Systems is an expanding youg high technology Amarican company with roots in European craftsmanship and esthetic sensitivity. We are dedicaated to innovation and leadership but not technological novelty for its own sake. At ADS advanced technology is always at the service of musical enjoyment, and it is always firmly grounded in the sciences of physics, chemistry and acoustics. Over the years, ADS products have consistently received high critical acclaim and won conveted design and engineering awards. Having made headlines in 1975 with the now-famous ADS 2001 System,, the world's first high-fidelity bi-amplied miniatuure speaker system. ADS technology today extends to a complete line of home and professional speaker systems, bi-amplification and modular systems, ambience synthesis (digital delay) systems and automotive audio products. ADS 2-way bookshelf speaker further exemplify ADS engineering excellence in pursuit of better music reproduction.



L 420
Specifications
Frequency Response:  48 - 20,000 Hz ±3 dB (38 - 22,000 Hz ±5 dB)
Impedance:  6 Ω (nominal), 4 Ω (minimum)
Efficiency:  92 dB SPL with 2,8 V RMS ( 1 watt) pink noise input measured at 1 m in typical listening room (2000 ft²)
Driver Complement:
HF :  1" soft dome tweeter
LF :  7" Stifflite woofer
Crossover:  1,500 Hz  12 dB/octave
Power Rating:  50 watts (nominal),  100 watts (max peak program)
Recommended Amplifier Power:  15 watts (minimum), 100 watts (maximum)
Cabinet:  Selected natural walnut over extra-high-density particle board
Baffle:  piano black finish with diffraction corrected flush driver mounting
Grille:  Acoustically transparent removable frameless grill in bronze finish.
Dimensions (Hx W x D):  17-1/2" x 11-1/4" x 7"
Weight:  7 kg (16 lbs)

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