Bose Direct / Reflecting 901 Series 4 - Manual (Page 16)

Living with your BOSE 901 Loudspeakers
If you decide to hang your speakers, place the Pan II speaker
on the left side of the room and the Part I speaker on the right
side of the room.’ Turn the speakers upside down and place
them on a covered surface or rug.
‘Please note that the reversed speaker placement is intentional and is
necessary when usir>g electronics products to be introduced by BOSE to
operate with the center terminal found on the 901 Series III and IV Loud>
soeaker.
THREE-CHAIN OR FOUR-CHAIN MOUNTING
Three-chain mounting utilizes the holes (B) near the front of
the cabinet, and a third pilot hole located near the ”V” of the
cabinet.
When suspending the speaker with four chains, use the four
predrilled holes (C) located near the corners of the speaker.
Insert four y^-inch eyehooks in place. The speaker system
weighs 35 pounds and care should be taken to ensure that
the speaker Is safely supported from the ceiling. A supporting
chain should be attached to a structural support, such as a
beam or joist.
If you have placed the speakers quite high in your listening
room, the sound can be directed downward by angling the
rear of the speaker down. The sound will be directed
downward after it is reflected off the rear wall. This is done by
increasing the length of the rear chain(s) holding the speaker
system in place.
INSTALLING THE RUBBER FEET
The speaker is supplied with four rubber feet and four screws.
These feet should be used to prevent possible damage to sur­
faces such as shelves or tables. Insert the feet with the
screws in the four holes (C) located near the corner of the
cabinet.
D. ROOM ACOUSTICS
The acoustical properties of the room (such as the size,
shape, construction, and furnishings) play an Important part in
the quality of sound produced by your high-fidelity system.
A lack of bass response frequently may be attributed to walls
of thin panel construction, large openings (e.g., doorway), or
excessive window glass, which allow low frequencies to pass
through rather than reflecting them Into the listening room.
The overly bright sound of acoustically “live" rooms (e.g..
those with uncovered floors or scatter rugs, small amounts of
furniture, hard walls) can be improved by the addition of rugs
and heavy drapery, which also serve to eliminate echoes and
standing waves. For acoustically “dead” rooms (e.g., rooms
with wall-to-wall carpeting, heavily upholstered furniture and
draperies.) furnishings should be rearranged or removed.
The unique controls on your 901 IV Equalizer are especially
helpful in compensating for the characteristics of different
rooms.
i»
B.c B.C
-iP'
16