ALLISON: SIX
In the
Allison: Six the Stabilized Radiation Loading design principle is carried to
just about its practical limit for an 8-inch woofer. The cabinet is reduced in size to ½ cubic foot, yet the system's low-frequency
output is basically flat to below 50 Hz (-3 dB at 46,5 Hz) while maitaining
reasonable efficiency. Response can be equalized flat to below 30 Hz at
moderate sound levels with The Electronic Subwoofer.
The same
Convex Diaphragm tweeter as those used in all Allison loudspeaker systems is
also used in the model Six. Therefore it has equivalent high-frequency range,
smoothness, and the same uniquely wide dispersion in the forward hemisphere.
The model
Six is intended for use with its back close to one room wall; on a shell,
table, or bookcase, or mounted on the wall. The woofer panel can be oriented
horizontally or vertically.
Because of
the small cabinet size and the walnut-grain vinyl finish, the Allison: Six 's
price is substantially below that of the model Five.
Specifications
Model Six
Speaker Complement:
Woofer : one
8-inch (203 mm)
Tweeter :
one 1-inch (25 mm ) Convex Diaphragm
Crossover
Frequency: 2 kHz
Crossover
Network: LC quarter-section. Air-core
choke and polyester capacitor are used. Two-position control switch (accessible
from front) supplied for selection of system acoustic power response, from
nominally flat to gentle HF rolloff.
Impedance: 4 Ω
nominal, (3,5 Ω minimum in any
balance control setting)
Efficiency: better than 0,7% when placed with back
against wall.
Minimum
Amplifier Power: 15 watts per channel to
produce 97 dB sound pressure level in most domestic room environments; 30 watts
per channel for 100 dB SPL
Power
Handling Capability: At least 15 watts
contiuous or average, at any frequency.
At least 35
watts peak at resonance frequency. Over most of frequency range, at least 350
watts for 0,1 second; 125 watts for 1 second; 60 watts for 10 seconds.
System
Resonsnce Frequency: 59 Hz, nominal
Effective
System Q: 1.0. Power response -3 dB at
46,5 Hz; -6 dB at 39 Hz, when placed close to center of large wall.
Low-frequency output increases when system is placed in typical positions with
respect to side wall and floor or ceiling
Enclosure: stabilized Radiation Loading sealed acoustic
suspension design.
Internal
Volume: 14,1 litres (860 cubic inches)
Material: particle Board veneered with walnut, oiled
finish.
Dimensions
(H x W x D): 286 x 286 x 286 mm
(11-1/4" x 11-1/4" x 11-1/4")
Weight: 7,7 kg (17 lbs)