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Installation and operation
Amplifier to speaker connections
All connect ions should be made
The lef t channel amplif ier
with the amplif ier switched
output terminal marked '+' or
OFF. Ensure the integrity of all
coloured RED connects to the
connect ions prior to switching
lef t speaker terminal marked '+'.
the amplif ier ON.
The lef t channel amplif ier
output terminal marked '-' or
KEF Blade Meta speakers are
coloured BLACK connects to
f it ted with purpose designed
the lef t speaker terminal
silver-plated Bi-wire/Bi-amp
marked '-'. Similarly, these
terminals which will accept bare
instruct ions should be followed
wire, spade or 4mm connectors.
between the right channel
Most good quality speaker
amplif ier output and the right
cables have some indicat ion,
speaker. Correct polarity, or
such as colour coding or
phase, is vital to the proper
'ribbing' on the insulat ing
operat ion of the system.
conductor is '+' or posit ive.
If the connect ions are not
Connect ion to the speakers can
made correctly the sound will
then be made as follows:
deteriorate giving poor
bass output and a dif fuse
presentat ion of the soundstage.
Bare wire connect ions are the
simplest to achieve and involve
stripping 12.5mm (0.5in.) of
insulat ion to expose the
speaker wire core. (You should
twist together, using clean
f ingers, the ends of each
mult i-stranded core prior to
the next stage to ensure
a good signal contact). Having
unscrewed the lower terminal
cap, push the wire through the
exposed hole in the terminal
body and screw the cap
down t ightly.
Make sure that no stray strands
come into contact with the
opposite terminal; this could
cause a short circuit between
the terminals and may damage
your amplif ier.
Be aware that a higher quality
run of cable will always give a
more rewarding presentat ion
than mult iple runs of an
inferior cable.
Installation and operation
Amplifier requirements
and power handling
In KEF literature and in the
If higher than specif ied
specif icat ion table within these
amplif ier powers are used, great
instruct ions are listed a range
care should be taken to avoid
of amplif ier power outputs to
abnormal condit ions such as
match your Blade Meta
switch-on surges or gross
distort ion, either of the
(room size, type of programme,
amplif ier or the speaker,
preferred listening level) and
result ing in power peaks greatly
the nature of the speaker/
in excess of the rat ings
amplif ier interface vary so
specif ied. Care should be taken
widely that it is not possible to
as the possibility st ill exists
lay down hard and fast rules
under certain condit ions (such
about amplif iers and the
as excessive bass or treble
speakers they drive.
boost caused by tone and/or
loudness controls, graphic
KEF speakers are built to
equalisers, etc.) that the
rigorous standards of quality
speakers can be overloaded and
and consistency and the upper
damaged. The lower limits of
amplif ier power are those
requirements shown are those
necessary to give a reasonable
which the speaker in quest ion
sound pressure level under
should handle without distress
domest ic condit ions.
or damage when used under
Remember it is easier to
damage the speaker by using a
small amplif ier driven into
distort ion by too much volume,
possibly with bass and treble
boost, than by using a larger
amplif ier which has power in
reserve. If in doubt,
ask the advice of your retailer
or consultant.
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