Altec Lansing 291-8L - Manual

291-8L/291-16L COMPRESSION
DRIVER LOUDSPEAKER
DESCRIPTION
The Altec 291-8L and 291-16L Compression
Driver loudspeaker has been designed for use in
high-level sound systems of the highest quality. It
may be used with Altec Mantaray, multicellular
or sectoral horns and will provide a smooth
response from 500-13,000 Hz. This wide range,
when used in conjunction with Altec low-
frequency loudspeakers, will provide full high-
fidelity reproduction for the largest theatre or
auditorium. Improvements in- diaphragm/voice
coil assemblies and magnetic structures allow the
291-8L and 291-16L to exact a smoother and ex­
tended response characteristic over the
500-13,000 Hz band. The 291-16L has a minimum
impedance of 16 ohms; the 291-8L, 8 ohms.
The diaphragm/voice coil assembly of the 291-8L
and 291-16L can be replaced in the field by un­
trained personnel without the use of special tools.
Adjustable dowell pins allow each voice coil to
be precisely centered in the voice coil gap, which
has a flux density of 2.05 T derived from a
6.87-pound Ferrite V magnet.
These improvements combine to produce a high-
frequency compression driver loudspeaker of vir­
tually matchless quality and limitless application.
SPECIFICATIONS
Power Capacity:
Frequency Response:
Pressure Sensitivity:
Minimum
Impedance:
Construction —
Magnet:
Magnetic
Structure Weight:
Diaphragm:
Voice Coil:
Dimensions:
Weight:
Finish:
Mounting Data:
50 watts average pink
noise
(Above measurement
made on Altec 300 or
50 Hz horn, with signal
band-limited from
500-20,000 Hz)
500-13,000 Hz
109 dB-SPL (re: 20 |xPa) with
1 W of pink noise band-
limited 500 Hz-16 kHz, at
1 M from lips of MRII594A
horn.
291-8L-8 ohms
291-16L-16 ohms
6.87-pound Ferrite V,
2.05 T flux density
29.5 pounds
Aluminum dome with
Kapton® suspension
2.8" diameter of edge-
wound aluminum ribbon
7.61" (19.32 cm) diameter
5.8" (14.8 cm) depth,
less mounting studs
30.5 pounds (13.83 kg)
Gray "Hammertone"
enamel
User adjustable for Altec
standard 3-bolt flange
or 4-bolt flange.