KEF Electronics RS
Model 103.2 2-way bookshelf loudspeaker is said to use a 20 cm low-frequncy
driver that is mechanically isolated from its enclosure to reduce the
transference of inertial forces and thereby greatly reduce coloration caused by
cabinet resonance. Electrical compensation is also used to improve efficiency
and provide highpass signal filtering. Electronic overload protection is in the
form of an automatic self-powered device called S-Stop, which is an acronymm
for Steady static and Transient Overload protection. Because this protective
device is so effective, the Model 103.2 is conservatively rated at 150 watts.
KEF 103.2 features:
Flat frequency
response of direct sound
Minimum inter-unit
time delay
Unique bass loading
technique giving higher efficiency and greater power handling capacity than
conventional systems
Electronic overload
protection
Computer matching of
component parts and drive units.
KEF speakers are
known the world over for their smooth, natural sound and capacity for
reproducing fine detail. Their refined performance is due to a combination of
unusual diaphragm materials, crossover design and careful assembly methods..
The Model 103.2 for instance is equipped with two drive units, both of which
employ special plastic diaphragms and a computer designed dividing network. The
intricate design procedures which KEF developed in the early seventies have
been applied to every vital feature of the new speaker.
The resulting sound
possesses a transparent airy quality which constantly dlights the ear and never
causes listener fatigue. The precise matching of speaker pairs produces
convincing stereo images of great depth and sharpness.
Bass Loading
Model 103.2
possesses some important new features which improve bass and lower mid range
reproduction. The chassis of the 200 mm low frequency driver is mechanically
isolated from its enclosure to reduce the transference of inertial forces and
thereby greatly reduce colouration from cabinet resonance.
Electrical
compensation is also incorporated in the dividing network to improve efficiency
and provide high-pass signal filtering.
Electric Overload
protection
The widespread use
of high powered amplifiers has made it necessary to protect loudspeakers
against accidental overload. KEF pioneered electronic overload protection for
professional monitoring loudspeakers in the sixties and more recently developed
a completely automatic self-powered device called S-STOP ( Steady State and
Transient Overload Protection).
S-Stop is the most
comprehensive, practical and effective protection circuit in use. It guards
thermal overload, woofer over-swing and voltage surges. Immediately any sale
limit is exceeded the input level is reduced by means of a relay-operated
attenuator. Because S-STOP is so effective Model 103.2 conservatively rated at
150 watts.
Frequency
Range: 60 Hz - 20,000 Hz ±2 dB (at 2m on
design axis)[-10 dB at 37 Hz and 30 kHz]
Directional
Characteristics (within 1 dB of response on design axis):
Up to 20,000 Hz
: ±5° Vertically
Up to 10,000 Hz
: ±20° Horizontally
Sensitivity
Level: 86 dB SPL (anechoic condition, at
1W/1m)
Maximum Output: 106 dB SPL (on programme peaks under typical
listening conditions)
Distortion Second
Harmonic:
20 Hz to 150 Hz
: less than 2%
150 Hz to 20 kHz
: less than 1%
Distortion Third
Harmonic:
20 Hz to 50 Hz
: less than 2%
50 Hz to 20 kHz
: less than 1%
Enclosure: 10 liters
Power Handling
Capacity:
Programme Rating
: 150 W
Max. Continuous
Sinusoidal Input : 20 V RMS, 100 Hz -
2,5 kHz 9falling to 8 V RMS from 4 kHz - 20 kHz)
Electronic
protection S-STOP: the system is
protected against any continuous or intermittent fault conditions which produce
input signals not greater than 60 V peak from DC to 50 kHz
Nominal
Impedance: 8 Ω
Finishes: Choice of walnut, teak, rosewood and black
ash veneers with blac or brown grille fabric as appropriate.
Dimensions (W x H x
D): 265
x 510 x 240 mm
Weight: 8,6 kg (19 lbs)
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