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

III. Installation
Your 901 Series IV speaker system consists of three parts: two
speakers {marked “Pan 1 ” and “Part 2“) and an electronic Active
Equalizer packed in the “Part V* container. Installation consists
of three steps: 1)placing your speakers for best sound, 2) connec­
ting the speaker to your amplifying equipment, and 3) connecting
the equalizer to your amplifying equipment.
If you place the speakers within the ranges suggested here, the
unique adjustments found on the 901 Series IV equalizer will allow
you to achieve optimum performance. (See SECTION V).
A. PLACING THE SPEAKERS
Unlike conventional speakers, the 901 Series IV functions with
the acoustics of your listening room, simulating the spatial
characteristics of the larger environments associated with a live
performance. This important advantage allows considerable
■freedom of placement and produces an unusually large “best
listening area." Outstanding performance can be obtained
under a wide variety of placement positions. (See Figure 2.)
The following guidelines in placing the speaker cabinets will
help you obtain the
best performance. The basic idea is to pro­
vide space to allow the sound to develop around the speaker
system.
1. The angled grille panels found on the enclosure are the
rear face of the 90i speaker (see Figure 1). Point this por­
tion of the speaker toward the reflecting wall (the wall
behind the speaker). The point of the “V“ should be bet­
ween 12’ and 24*’ from the reflecting wall. Best results will
be obtained with the speakers placed between 12" to 18"
from the reflecting wall.
2. Speakers should be placed at least 18" above the floor or
below the ceiling (see Figure 1). Distances closer to the
ceiling or floor restrict the reflected sound energy.
3. The speakers should be at least 18" from a side wall or
opening into an adjacent room. (Suggested distances are
3' to 5'.) Large objects (such as furniture) should be at least
24“ away from the side of the speaker.
4. Best results will be obtained with the speakers spaced
apart 6' to 10'; however, separation as small as 3' or as
great as 15' will give excellent results in most rooms.
If you have not decided where to place your speakers and
would like more information, SECTION V (LIVING WITH YOUR
BOSE 901 SPEAKERS) provides several additional suggestions
for speaker placement.