Altec Lansing A6 Series Quick Start Manual

Unpack the 8256X cabinet. This cabi-
net is sealed at the factory; do not
attempt to take it apart or remove the
back panel.
Turn the cabinet so the short side with-
out fiberglass lining is up; drill a hole in
the top, avoiding the diagnonal brace.
This hole should be just large enough
to pass four wires through.
the second loudspeaker as shown in
Figure 2. Feed the attached red and
black wires through the hole drilled in
the top of the cabinet (Step 2) or
through one of the bass reflex ports;
install the second loudspeaker in the
remaining baffle opening and secure it
with the eight screws packed with the
loudspeaker.
A6 SERIES
LOUDSPEAKER SYSTEMS
12.
13.
14.
15.
16.
connectors from these wires and
replace them with those packed with
the 288-8K.
Place the N1285-8A on top of the cabi-
net, facing left or right; if the speaker
wires are routed through a port in the
baffle, put the N1285-8A on the same
side.
Set the frequency switch of the N1285-
8A to 500 Hz or 800 Hz. Wire the N1285-
8A according to Figure 2.
If the amplifier to be used cannot
safely drive a 5-ohm load, wire the sys-
tem as shown in Figure 3, using a
15067 autoformer.
If you wish to attach the N1285-8A to
the cabinet, let the front panel of the
network hang over the side of the
cabinet; drill or punch twao pilot holes
and install two wood screws to secure
the network.
Decide how much power loss is accept-
able in the line between the amplifier
and the loudspeaker; select a wire
gauge according to Altec Lansing
Technical Letter 265A. Attach the
wires to the input terminals of the
7. Lift the cabinet upright and place it in N1285-8A network.
NOTE the position it will occupy.
Do not drill this hole if the loud- 17. Adjust the tilt of the HF horn for great-
speaker is to be installed behind 8. Unpack the two brackets and driver est uniformity of direct sound in the
the screen in a motion picture cradle from the hardware kit. Assemble audience area; loosen the nuts and
theatre. them with two bolts, two lockwashers raise or lower the driver cradle as
and two 7/16" nuts. See Figure 1. Set necessary; retighten nuts.
The interconnecting wires are packed the assembly on top of the cabinet,
approximately centered with the driver 18. Operate the loudspeaker and adjust
Locate the four longest wires (one red cradle toward the rear of the cabinet. the H.F. LEVEL control on the N1285-
wire, one green wire, two black wires). 8A until the best spectral balance is
9. Upack the 288-8K HF driver and the HF achieved.
Unpack the two 3156 LF loudspeakers. horn (MRII564, MRII594, or MRI15124).
Attach a green and black wire to the Place the gasket packed with the 19. If there is sufficient front-to-back
terminals of one loudspeaker. See 288-8K around its sound exit hole; clearance around the loudspeaker,
Figure 2. install the 288-8K on the horn, securing adjust phasing of the drivers according
it with the three lockwashers and 9/16" to Altec Lansing Applications Note 9.
Lay the 8256X cabinet on its back nuts provided. This will require the front lip of the HF
panel. Mount one 3156 loudspeaker in horn to overhang the front edge of the
one baffle opening of the cabinet; 10. Engage the lip flange of the horn in the cabinet about 7".
attach the loudspeaker with eight
screws packed with the loudspeaker.
Note that the flange of the loudspeaker
is outside the cabinet, with the frame
and magnet structure protruding into
the cabinet.
Route the green and black wires of the
loudspeaker through the opposite baf-
fle opening; attach the wires to the
second 3156 loudspeaker. Also attach
red and black wires to the terminals of
11.
two ears of the mounting brackets and
swing the driver down into the cradle.
CAUTION
The magnet will pull the cradle
toward the driver as it is lowered
into position.
Attach the short black and white wires
packed with the N1285-8A network to
the terminals on the 288-8K. It will be
necessary to remove one pair of crimp
20.
21.
After locating the horn position, mark
location of the four holes in the mount-
ing brackets; drill or punch pilot holes
in the cabinet for the four wood screws
provided in the hardware kit.
If it becomes necessary to replace the
diaphragm/voice coil assembly in the
288-8K driver, use a 23763 diaphragm;
follow service instructions in Altec
Lansing publication 42-02-035593.
Specifications and components subject to change without
notice. Overall performance will be maintained or improved.
ALTEC
42-02-035639 42-07-035639
REVISION 2
LITHO IN U.S.A. 1091-1.7M
ALTEC LANSING CORPORATION
LANSING
a MARK IV company
10500 W. Reno Ave., Oklahoma City, OK 73126