DESCRIPTION
The A L T E C 15948 Power Amplifier delivers u p t o
100
watts of output power for all
of sound reinforcement
Systems.
I t remains stable with operating conditions o f
line voltages and w i t h all types of loads, including
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
A switchable, two-section
filter is provided t o pro-
tect driver loudspeakers f r o m excessive low-frequency power
demands.
Active Dissipation Sensing Circuit provides fail-
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
portion of
material that would damage or degrade the output
transistors.
ACCESSORIES
A
or
Line Transformer is available
t o provide line isolation.
I n p u t sensitivity for full-rated
amplifier output
rms with the
Transforiner
and
rms w i t h the
Transformer.
The 42526 Shelf Mount Cover
i s
available t o enclose the
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
preventaccidental changes
of
control
The cover provides easier handling f o r portability and i t is
sturdy enough t o support lightweight equipment placed on
of it. Four polyethylene feet prevent marring of sur-
faces. The A L T E C green finish matches the front panel o f
the
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
use.
Vertical space
7
inches
rack
units).
R A C K I N S T A L L A T I O N
Step
1.
Remove four screws securing front panel. Open
and lower panel
as
shown i n Figure 5.
Step
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
removed.
SHELF I N S T A L L A T I O N
The
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
POWER DRIVER PCB
POWER DRIVER BALANCE CONTROL
PRIMARY POWER TERMINAL BOARD
BA
LANCE
CONTROLS
PCB
Figure 5. F r o n t
With Hinged Panel Open
