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The LS5/9 is a high quality studio monitor that was designed by BBC Research
and Development and featured a brand new 8 inch bass/midrange drive unit that
was developed entirely in-house and constructed using the best materials
available at the time.
Designed for use by the BBC in smaller studios and control rooms, the LS5/9 is
a close sonic match for the larger LS5/8. Equally at home in a domestic
setting, the open and expansive mid-range reveals previously unheard details
from even the most familiar recordings.
With Derek Hughes at the drawing board, the original BBC design has been
relaunched by Graham Audio. A new bass/midrange driver has been developed in
conjunction with Volt Loudspeakers which uses a substantial die-cast aluminium
frame and a massive motor assembly, allied to a diaphragm formed from a
selected grade of polypropylene and matched to a high quality rubber surround.
Each bass driver is hand-assembled and tested by Volt.
The tweeter is a selected version of the Audax 34mm soft dome, which is
protected by a strong metal grille. A sophisticated crossover network blends
the units together and equalises the overall response for optimum performance
in free space.
The cabinet uses classic BBC \"thinwall\" construction, and is manufactured in
the UK from high quality 9mm birch plywood. Hand-matched veneers are applied
and finished to a very high standard indeed. All joints in the cabinet are
reinforced with hardwood batons to ensure long life and total air sealing. The
panels are mass-loaded to ensure that resonances are moved away from the
critical mid-range region, and a layer of Rockwool held in place by fabric
provides air damping. The grille - machined from a single piece of 9mm birch
plywood - is held in place by concealed rare-earth magnets.
Specifications
System 2 Way, reflex loading
Enclosure Thin wall construction, birch plywood
Finish Real wood veneer
Dimensions (w/h/d) 28cm by 46cm by 27.5cm
Weight 14kg
Frequency response 50Hz to 16kHz, ±3dB
Nominal impedance 8Ω
Sensitivity 87dB SPL (2.83V, 1m)
Maximum output Over 100dB for a pair at 2m
Bass/midrange 200mm Diaphnatone polypropylene
Tweeter Son Audax HD13D34H
Recommended amplifier power 50 to 200 watts unclipped programme
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