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directivity and which can affect the reproduction of mid and high frequencies.
One characteristic of forward-facing loudspeakers is that the sound output
lessens as one moves away from the principal axis. If the dispersion
characteristics of the loudspeaker are different at various frequencies,
the reflected sounds will be very different in quality both from each other
and from the first (i.e., direct) sound. The ears don't ignore these differences;
they perceive them as coloration, or as sound quality that has been degraded.
The Prelude Forty system has been carefully designed to maintain a directional
pattern that is similar at every important angle, on and off axis. The positive
result is that both direct and reflected sounds arriving at the listeners' ears
have similar timbral signatures.
An all-new, controlled-directivity waveguide ensures smooth high-frequency
delivery across the entire listening area and increases high-frequency
efficiency, lowering distortion and improving dynamic range.
It is hoped that you have enjoyed this brief introduction to the technology
of the Prelude Forty loudspeaker system. If you would like to further
explore the technology and design of the Prelude Forty system, please ask
your Infinity dealer for the CMMD and MRS white papers. The white papers
can be downloaded from www.infinitysystems.com.
U
P
NPACKING THE
RODUCT
Finish unpacking the speakers and check the contents. If you suspect
damage from transit, report it immediately to your dealer and/or delivery
service. Keep the shipping carton and packing materials for future use.
I
NCLUDED
:
1 x Prelude Forty loudspeaker
1 x Upper grille
1 x Lower grille
1 x Left woofer grille
1 x Right woofer grille
4 x Spikes
1 x Owner's manual
1 x USA warranty sheet
A
SSEMBLY
I
S
F
NSTALLING
PIKED
EET
Four metal spikes are supplied for use when using the speaker on a carpeted
surface, to decouple the speaker from the floor and prevent unwanted
damping. To insert the spikes, gently lay the speaker on its back on a soft,
nonabrasive surface. Each spike screws into the threaded insert in each
outer foot. Make sure all four spikes are screwed in completely for stability.
NEVER drag the speaker to move it, as this will damage the spikes, the
feet and/or the wood cabinet itself. Always lift the speaker and carry it
to its new location.
I
G
NSTALLING
RILLES
Top Grille
1. Insert the two pins into the rubber cups located in the top of the logo bar,
as shown in the front view in Figure 1.
2. Let the magnets draw the top of the grille against the driver trim area,
as shown in the side view in Figure 2.
Figure 1.
Bottom Grille
1. While holding the grille at a 45-degree angle to the speaker, insert the
two hook tabs into the two slots on the underside of the logo bar,
as shown in the side view in Figure 3.
2. Let the magnets draw the bottom of the grille against the driver trim
area. Ensure the hook tabs are properly engaged in the slots of the
logo bar to properly support the weight of the grille, as shown in the
side view in Figure 4.
Figure 3.
Side Grilles
1. Insert the six grille pins from the appropriate grille into the rubber
cups in each woofer's trim panel, as shown with the right side grille
in Figure 5.
Figure 5.
Magnets
Figure 2.
Magnets
Figure 4.
INFINITY PRELUDE FORTY
3
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