Ceiling Mounting: PI-C6, PI-C6S and PI-C8
Check the ceiling carefully. As all the weight
acts directly downward ensure that the ceiling
panel and structure will support the speaker.
Suspended Ceilings:
If the grids are 600 x
600 mm (2’X2’) we suggest you strengthen the
panel. If the grids are 1200 x 600 mm (4’X2’)
the panel may be too weak, especially for the
PI-C8. It may be advisable to suspend the
assembly from the grids and not rely on the
panel alone (see drawing). Alternatively, use a
safety wire tethered securely to the speaker
frame and attached to a nearby anchor point on
the ceiling grid.
Remove the grille. Make sure the speaker
mounting lugs are within the circumference of
the cutout, support the speaker with one hand
and push it through the hole. With the free
hand, insert a screwdriver into each mounting
screw and rotate the lug outwards. Tighten
each lug in turn until the speaker is securely
trapped to the ceiling. Keep the speaker
centralised in the hole during mounting.
When cutting into cavities during installation, it is essential to ensure that existing fire
barriers are not breached, and that the installation does not result in a new fire
hazard. If you suspect that either has occurred or is likely to occur, consult a
competent surveyor or your local Building Control Authority for advice.
In cases where a loudspeaker may be mounted close to a resonant structure, such as
a ventilating duct or plastic drainpipe, it may be a good idea to place some sound
absorbing material around the structure to damp down these resonances. Similarly,
in a ceiling cavity that may be resonant, a pad or sheet of fibreglass may be tacked in
place loosely around the speaker - taking care to keep it clear of the components of
the speaker. If space permits a fibreglass curtain may be hung to advantage behind a
wall-mounting speaker.
It is essential that any insulating or sound absorbing material is non-flammable and
compliant in full to all building and electrical standards in force in your locality.
Note:
The tweeter on the PI-C8 is mounted off-axis. When these speakers are used
in a stereo or home cinema installation, the tweeters should face inwards so that they
can be adjusted for optimum effectiveness.
Fire Barriers and Hazards
Damping Materials
Treble and Bass Adjustments
PI-C6 and PI-C8:
These speakers have separate three way switches on the front of
the unit that can be used to adjust the treble (HF) and bass(LF) level +3dB, 0, -3dB.
The PI-C6ST is described on the following page.
PI-W6:
The PI-W6 features HF adjustment by +3dB, 0, -3dB on a front mounted
switch. Bass adjustment is by means of a set of tabs 3dB, 0, -3dB. As
supplied the unit is in the 0dB position and a red cable with a push on spade is
connected to the 0dB tag. To adjust the bass response up or down, lift off this spade
and replace it on the required tag.
PI-W8:
The PI-W8 has three front mounted switches for separately adjusting the HF,
Midrange and Bass level by +3dB, 0, -3dB.
Default factory setting is 0db in all cases. Boost and cut should only be finalised after
listening tests in situ and after the tweeter pods are adjusted for optimum dispersion.
Altering the bass changes the impedance of the loudspeaker. When set to 0dB, the
impedance is 6
Ω;
at the +3dB setting it is 4
Ω
, and when set to
-3dB it is 8
Ω.
Adjusting the Treble Dispersion
The PI-C6, PI-C6ST and PI-C8
ceiling speakers and the PI-W6
wall loudspeakers feature pod-
mounted ball tweeters. When
adjusting the pod, take care not to
damage the tweeter dome.
The pod is capable of a virtual 360º
circular rotation and a virtual 180º
axial adjustment so a wide variation
in dispersion is achievable.
The PI-W8 has a rotatable mid/tweeter assembly. This is described on Pgs 5 & 8.
The pods should be adjusted so that the HF dispersion is focused on the listening
area. Where the speakers are used as surrounds the focus should be slightly
behind the listening position for good diffusion of rear effects. If an architectural
speaker is used as a home cinema centre channel, keep the focus tight on the
listening seat. The diagrams on Pgs 2 & 8 provide an idea of dipersion patterns.
Installing Grilles
This is the final stage of assembly. Always make sure that the backing gauze is in
place before you install grilles and insert them by applying light hand pressure around
the perimeter. DO NOT apply pressure in the middle of the grille or you may dent it. PI
Series Grilles are not designed for frequent removal and replacement.
Ceiling grilles
may have to be lightly worked by hand to ensure a tight fit. We
recommend that you apply a very small amount of silicone sealant around the outside
of the grille perimeter to keep it totally secure.
SUSPENDED
CEILING
BRIDGE
6
7
