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Always use the best quality of cable available within your budget. High quality audio signals passing from the amplifier to
the loudspeaker are unusual in their demands on the cable. Wide dynamic range and frequency bandwidth information has
to coexist with the ability to transmit peak currents of at least 10amps, without incurring any loss or signal impairment. This
explains why the sound quality of the information reproduced by the loudspeakers is so dependant on the physical properties
of the cables connecting them to the amplifier.
We would recommend that you always keep the cable runs the same length for each speaker.
Remember, cable construction can affect the sound quality so be prepared to experiment to find a cable that suits your ear
and audio system.
CABLE CHOICE
(See fig. 1)
In order to take advantage of the driver earthing feature within the Dimension range and to optimise performance further,
use a shielded or screened loudspeaker cable. The screening termination should be connected to the earth or 'ground' (green)
terminal on the loudspeaker and to the ground or earth connection on the amplifier. Alternatively if you are not using a
screened loudspeaker cable but wish to utilise the earthing facility, run a single cable between the earth or 'ground' (green)
terminal on the loudspeaker to the earth (ground) connection on the amplifier.
TERMINAL PANEL
WARNING: THESE LOUDSPEAKERS ARE HEAVY - SEEK ASSISTANCE WHEN LIFTING.
To remove the loudspeakers from the packaging please follow these instructions carefully:
Lay the carton on the floor noting that the text (OPEN THIS END) on both ends of the box are visible and the arrows on the
carton ends point towards the floor - in this position the speaker in the carton will be positioned on its back. Remove the
packing tape from both ends of the carton and fold the carton flaps right back. The spike kit (containing rear spikes, nuts,
washers, cone tips and floor protection cups) is immediately visible. These accessories are essential for optimum performance
and for providing a rigid and stable footing for the speaker. The secure interface between the cabinet and the floor brings
about an improvement in clarity, bass 'speed' and definition.
To facilitate easier removal of the Dimension speakers from their packaging, the carton side has been fitted with plastic
locking devices, which allow the carton to be fully opened along its length, and then folded back. To remove each of the
plastic locks, insert two fingers into the device and pinch the two flat ribs together - this will unlock the ribs and allow the
whole locking mechanism to be pulled free from the box. Once all the locking devices have been removed, fold back the
carton to reveal the contents. Carefully remove the packing material from the bottom of the loudspeaker so that this end of
the speaker can be carefully lowered onto the floor. Follow the rest of the instructions below regarding the fitting of cones
and spikes BEFORE tilting the speaker into an upright position.
It is strongly recommended that you store all the packaging to allow protected transportation in future.
WARNING: IT IS IMPERATIVE THAT THE SPIKES AND CONE TIPS ARE FITTED BEFORE THE SPEAKER IS PLACED
IN AN UPRIGHT POSITION. FAILURE TO DO SO MAY CAUSE THE SPEAKER (ESPECIALLY TD 12) TO TIP OVER
WITH THE RISK OF DAMAGE OR INJURY.
The spikes, along with washers and lock nuts, should be fitted loosely into the threaded holes in the base at the rear of the
cabinet. The cone tips should then be threaded into the ends of the polished alloy cones at the front of the speaker. Level
the rear spikes to the front cones by eye then hand tighten the lock nuts. Spike locating cups are provided and these may
be used to protect sensitive floor surfaces.
The loudspeaker can now be carefully lifted into an upright position and the packing piece removed from the top panel.
3. Refer to the paragraph headed 'Positioning' for speaker placement advice.
4. The alloy side strips of the speaker are protected with a plastic film; it is recommended that this be left on for protection
and should not be removed until the speaker is fully installed.
UNPACKING
Consult the enclosed product specification sheet as this clearly shows the acceptable power range for amplifier matching to
your speakers. The high peak power handling of Tannoy loudspeakers permits responsible use with more powerful amplifiers
- please read the Warranty.
As with all loudspeaker systems, the power handling is a function of voice coil thermal capacity. Care should be taken to
avoid overdriving any amplifier, as this will cause output overload resulting in 'clipping' or distortion within the output signal.
This, if done for any extended period, will cause damage to the speakers.
Generally an amplifier of higher power that is running hard, but free of distortion, will do less damage to the loudspeaker
than a lower power amplifier continually clipping. Remember also that a high powered amplifier running at less than 90%
of output power generally sounds a great deal better than a lower powered example struggling to achieve 100%. An amplifier
with insufficient drive capability will not allow the full performance of the loudspeakers to be realised.
AMPLIFIER CHOICE