ALLISON:
FIVE
Introduced
in 1976, the Allison: Four loudspeaker
system established a new standard of performance for "bookshelf" systems of its size and
price. It has still not been fully equalled. But the Allison: Five system now
offers very nearly the same performance as the Four at a significantly lower
price.
Both have an
8-inch long-excursion woofer in a cabinet of moderate size. Low-frequency
performance is identical; Stabilized Radiation Loading design enables the
systems to deliver bass power to a listening room that is essentially flat (-3
dB) to 41 Hz . This can be extended to 20 Hz at reasonable sound levels with
The Electronic Subwoofer equalizer.
The Allison:
Five system has a single Convex Diaphragm tweeter, as compared with two in the
model Four. With only one tweeter the cabinet is a simple rectangular shape,
less costly than that of the Four, which provides a further saving. The only
performance compromises are a slight reduction in high-frequency power handling
capability and slighty less high-frequency dispersion. In both respects,
however, the model Five is significantly better than competitive speakers.
Balanced for
use close to one room wall, the Allison: Five cabinet can be put on a table or
a shelf, or mounted on the wall. It can be oriented with its long dimension
either horizontal or vertical.
SPECIFICATIONS
Model Five
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: 52 Hz, nominal
Effective
System Q: 1.0. Power response -3 dB at
41 Hz; -6 dB at 34,5 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: 20,73 litres (1,265 cubic
inches)
Material: particle Board veneered with walnut, oiled
finish.
Dimensions
(H x W x D): 279 x 464 x 254 mm
(11" x 18-1/4" x 10")
Weight: 9,5 kg (21 lbs)