Altec 1594B Operating Instructions Manual page 4

DESCRIPTION
The A L T E C 15948 Power Amplifier delivers u p t o
watts of output power for all Types of sound reinforcement
Systems. I t remains stable with operating conditions o f
long, unloaded speaker lines having considerable capacitance.
Frequency response and o u t p u t power characteristics are
shown i n Figures 1 through 4.
A switchable, two-section highpass filter is provided t o pro-
tect driver loudspeakers f r o m excessive low-frequency power
demands.
safe protection for the output transistors. Circuit action is
immediate and effective at all frequencies w i t h i n the pass-
band o f the amplifier, limiting o n l y that portion of p r o y a m
material that would damage
transistors.
ACCESSORIES
A plug.in 15095A or 15335A Line Transformer is available
t o provide line isolation.
amplifier output i r 0.2V rms with the 15095A Transforiner
and 0.8V rms w i t h the 15335A Transformer.
The 42526 Shelf Mount Cover
15948 for shelf use. I t tilts the 15948 for easy accesr t o
front panel controls. The sides and t o p extend beyond the
front panel t o preventaccidental changes
The cover provides easier handling f o r portability and i t is
P O W E R DRIVER PCB
LANCE
BA
CONTROLS
100
or degrade the output
I n p u t sensitivity for full-rated
available t o enclose the
i s
control settihgs.
of
P O W E R DRIVER BALANCE CONTROL
PCB
Figure 5. F r o n t View With Hinged Panel Open
sturdy enough t o support lightweight equipment placed on
Four polyethylene feet prevent marring of sur-
faces. The A L T E C green finish matches the front panel o f
the 15948.
I N S T A L L A T I O N
The 15948 may be installed i n a standard 19-inch equip-
ment rack, or i n the 42526 Shelf Mount Cover accessory
for shelf Vertical space requkred
use.
units).
R A C K I N S T A L L A T I O N
1.
Step Remove four screws securing front panel. Open
and lower panel
as
Step 2. Install 15948 i n equipment rack with appro-
priate f o u r screws supplied.
Step 3. Close f r o n t panel and secure w i t h four screws
SHELF I N S T A L L A T I O N
The 15948 may be shelf mounted as desired after installing
the A L T E C 42526 Shelf Mount Cover (refer t o 42526
Installation Instructions).
V E N T I L A T I O N
The 15948 generates minimal heat during normal use. A l -
though the amount of heat i s relatively low, the amplifier
PRIMARY P O W E R TERMINAL BOARD
7 inches (four rack
shown i n Figure 5.