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 L730

 The ADS L730 3-Way Loudspeaker System
Although similar to its predecessor, the much acclaimed ADS L630, the L730 merits a new model designation because of major component changes and performance improvement. The all-new L730 is, arguably, one of the most significant advances in bookshelf speaker design in recent history. It produces surprisingly deep, tight bass for a speaker of it size thanks to a new 10" ADS Stifflite woofer. A new midrange driver delivers uncanny accuracy in reproducing critical human voice. It is unexcelled in open, clean, and airy reproduction of highs, attributes associated with the state-of-the-art. ADS 3/4-inch soft-dome tweeter. A direct outgrowth of ADS' research and development of monitor spaekers for digital recording sessions, the l730 naturally provides excellent stereo imaging and unusually wide dynamic range.

New 10-inch ADS Stifflite woofer has tapered "honeycomb" cone construction for high internal damping, optimum mass/stiffness characteristics, and low total moving mass; bass is deep , yet tight and highly controlled; extra-long-excursion design and high-temperature voice coil ensures superb linearity,  wide dynamic range, and high power-handling.
New 1½ inch ADS acoustic suspension soft-dome midrange driver takes advantage of most recent materials technology and precision manufacturing techniques; driver has unprecedented low distortion, low coloration and wide dynamic range.
The proven ADS 3/4-inch acoustic suspension soft-dome tweeter delivers unmatched high-frequency performance; smoothness, extension, and dispersion are second to none; very high force/mass ratio ensures excellent damping and transient response, and contributes to efficiency and low distortion; ADS' unique single-layer, high-thermal-conductivity metal voice coil ensures high power-handling capability for wide dynamic range.
Precision crossover network seamlessly matches driver outputs with minimal distortion and power loss; highest guality network components ensure stable, reliable performance over years of use.
Choice of oak or walnut cabinet with radiused edges and soild oak/walnut edge reinforcements.
New acoustically transparent grill lends distinctive appearance while eliminating grill-frame structure for reduced difraction and improved dispersion.
New user-interface panel features heavy-duty binding-post connectors and readily accessible tweeter fuse with built-in spare.

Specifications L730
Frequency Response:  30 - 23,000 Hz, ±3 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 ft³)
Driver Complement: 
One acoustic suspension soft-dome tweeter, ¾" diameter, with single-layer, high-temperature metal voice coil; magnetic flux density - 1,8 Teslas (18,000 Gauss); magnetic flux - 325,000 nanoWebers.
One acoustic suspension soft-dome midrange driver, 1½" diameter, with single-layer, high-temperature metal voice coil; magnetic flux density - 1,5 Teslas (15,000 Gauss); magnetic flux - 1,000,000 nanWebers.
One long-excursion, high-compliance woofers, 10" diameter, with 1½" high-temperature voice coils and tapered Stifflite cone; magnetic flux density - 0,9 Teslas (9,000 Gauss); magnetic flux - 850,00 nanoWebers.
Crossover:  12 dB/oct at 550 Hz and 4,000 Hz
Power Rating:  100 Watts (nominal),  175 Watts (max. Peak program)
Recommended Amplifier Power:  20 Watts minimum - 200 Watts maximum
Dimensions (H x W x D):  25½" x 14" x 11¾"
Weight:  Approx. 42 lbs (19 kg)
Cabinet:  Select natural walnut over extra-high-density particle board, solid oak or walnut edge inserts.
Baffle:  Piano black finish with diffraction-corrected flush driver mounting.
Grill:  Acoustically transparent removable frameless grill in complementary finish.
Suggested Retail Price :  $ 365.00 each
Availability: Summer, 1980
Optional Accessory: ADS F800 black metal base, $33,00 each

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