Omni-Radial
Sound Field Speaker System
The
sound-in-theround speaker system. For the person who wishes his 4-channel sound
system to truly be be sound-in-the-round, Sansui is pround to introduce a
system that takes this new music form to its thrilling sound pinnacle. The SF-1
Omni-Radial Sound Field Speaker System is not just another omnidirectional
speaker, but a completely new concept in 360 degree sound, for it employs
speakers facing both upwards and downwards and makes use of specially-designed
reflectors to diffuse the reproduced sound in complete horizontal and broad
vertical directions.
This 2-way 3-speaker system produces a vibrant and
reverberant 4-channel system. Among its virtues, it has been designed to
accurately reflect the very important, but often overlooked "indirect"
sound waves of music reproduction. And these indirect waves are the vital
element of the live concert hall sound field. The authentic "live"
sound effect that so many speaker systems promise but so few deliver. In
addition, sound diffusion is extended in the SF-1 by the use of a new porous
foam acoustic diffuser placed behind the Kumiko fretwork grille, a device which
also helps to attain ideal dispersion of sound in the very high frequency
range. Beautifully designed and finished (like its larger twin speaker system,the SF-2), the SF-1 cabinet is made of solid natural wood and hard chipboard,
specially treated to resist heat or stains. The system is actually an expensive
piece of fine furniture - and looks it. From the most respected name is stereo,
Sansui.
Sansui's
Sf-1 system is designed to achieve rich ambience by radiating sound in a full
360 degrees so that it will be reflected off of more surfaces, and so that the
distinctively directional signals in the sound will intermingle with the
reflected sounds with fine time or phase lags.
How does it
achieve this sound radiation?
The SF-1
features a unique tetrahedron construction. Its two woofers and single tweeter
are on the same vertical axis.
Sounds
emanating by them are dispersed in complete 360-degree horizontal directions -
and in broad vertical directions as well - by a top and bottom reflector. When
the sounds reach the grilles located on the four sides of the system's
enclosure, their vertical distribution is broadend even more by a newly
developed porous foam acoustic diffuser.
The result
of this new technology is something totally unique in sound. No matter where
you place the SF-1, sound literally envelops you from all directions, in a
sense, you swim in sound, and it's an experience that does indeed make you
wonder why someone hasn't thought of this speaker idea before. Another
advantage of the SF-1: you may place it anywhere. No longer are you confined to
the corners of your room as you decide where to place your speakers. Freedom,
unlimited, for one thing. Sound unlimited, for another. And wouldn't you know
that Sansui discovered it.
Two
Woofers: There is one 165 mm
(6-1/2") woofer that faces upwards and another that faces downwards. Sound
from them is dispersed by top and bottom reflectors in all directions, the
better to reflect off of more surfaces (walls, ceiling, floor) and the better
to enhance the great sense of ambience and naturalness which the SF-1 provides.
Sealed
Tweeter: This is a 58 mm (2-1/4")
diameter unit completely sealed in the back by an over-sized cover to prevent
it from interfering with the woofer located directly beneath it. The usually
narrow dispersion of the tweeter sound is dispersed in a full 360 degrees by
the top reflector above it. Overall, the speaker boasts excellent transient
response and sound transparency.
Crossover
Network: The SF-1, despite its compact
size, is truly an advanced system, far more versatile than any other
omnidirectional speaker in its class or price range. Its crossover network
possesses a 6 dB/oct. cut-off characterictic that enables the speaker system to
prevent phase deviations between the woofers and tweeter and to provide a very
smooth transition between these two different types of speakers. This network
is equipped with a volume-type attenuator for the tweeter so that you may
adjust that speaker's output level to suit room acoustics and your own
listening taste.
Porous Foam
Acoustic Diffuser: This new type of
material replaces the usual speaker system cloth cover. It is advantageous for
any number of reasons, but especially because it enhances the sounds taht are
vertically dispersed by the top and bottom reflectors and helps to diminish
their harshness and bite. The end result is a mellow, natural, evenly
distributed sound field that you would usually experience only during a live
musical performance.
Heat and Stain Resistant Cabinet: The SF-1 is a beautiful piece of furniture as
well as a beautiful sound experience. Built of solid natural wood and hard
chipboard, its cabinet is specially finished on the surface to resist heat and
stains. It will not discolor or fade if you accidentally place a coffee cup on
it. In form and function, it is very near the peak of omnidirctional speaker
systems, and is only exceeded in quality by Sansui's large system , the SF-2.
8-Meter
(26-Foot) Long Connection Cable: To
allow you to position the speaker system anywhere in your room, the SF-1 comes
with an 8-meter long connection cable. This is the expensive soild cabtyre type
cable that gives added strength and effectively shields out noise.
Specifications:
Speaker:
Woofer
: 2 x 165 mm (6-1/2") cone type
Tweeter
: 1 x 58 mm (2-1/4") cone type
Power
Rating: 45 W (Peak)
Impedance: 8 Ω
Sensitivity: 90 dB/W at 1 m
Frequency
Range: 55 - 20,000 Hz ( in anechoic
chamber)
Crossover
Frequency: 2,000 Hz
Crossover
Network: 2-way 6 dB/oct.
Dimensions
(W x H x D): 370 x 563 x 370 mm
(14-9/16" x 22-3/16" x 14-9/16")
Weight: 12,0 kg (26,5 lbs) net; 14,3 kg (31,5 lbs)
packed
Finish: Solid natural wood open pore.