Altec Lansing 1593C User Manual

1593C

POWER AMPLIFIER

DESCRIPTION

The 1593C Power Amplifier is a solid-state unit
delivering 50 watts of power at less than 1% total
harmonic distortion (THD) from 50 Hz to 12 kHz.
The amplifier provides outputs for 4-ohm, 8-ohm
and 16-ohm loudspeakers, plus a 70-volt line out
put for distribution systems. In addition to the
high-impedance input, the amplifier has an octal
socket to accept a line-isolation transformer. A
selectable high pass filter is included for use in
speech systems. Cut-off frequency of the filter is

300 Hz.
The 1593C is capable of operation from a 120V or

240V ac source or a negative grounded 28V dc
source, and features silent, automatic transfer to
dc operation if ac power fails.

Designed for rack mounting, the 1593C occupies

three vertical units of rack space {S'A”). A hinged
front panel allows servicing without removing the
amplifier from the rack.

SPECIFICATIONS
Type:

Gain:
Input Sensitivity:
Power Output:

Frequency Response:

Input Impedance:

Load Impedance:
Load Voltage:

Output Impedance:

Noise Level:

Controls:

Power Supply:

Power Amplifier

61 dB

0.8 volt rms for rated output
50 watts at less than 1% THD,

50 to 12,000 Hz
±1 dB, 20 to 20,000 Hzatl

watt output.

±1 dB, 50 to 12,000 Hz at rated

output.

15.000 ohms (potentiometer)
600 ohms balanced with
15095A plug-in transformer

15.000 ohms balanced with
15335A transformer

4, 8, 16,100 ohms
14, 20, 28 (25V, 40-watt),

70 volts
Less than 10% of nominal

load impedance
—38 dBm or 85 dB below

rated output
Power on/off switch

Potentiometer, continuously

variable composition

High-pass filter switch (rear)

100/120/220/240Vac,

50/60 Hz
13 watts at zero signal
85 watts at 17 watts output
145 watts at 50 watts output

OR

Operating
Temperature Range:

Special Features:

Dimensions:

Weight:
Color:
Accessories (must be

ordered separately):

Design and
Performance
Approvals:

24/28 volts dc (battery (—) is
ground

0.2 amp at zero signal

2.5 amps at 17 watts output

4.0 amps at 50 watts output

Up to 50°C (131°F) ambient
Automatic transfer from ac

to dc power in the event of

ac power failure

Dissipation sensing device
for protection of output
transistors
High-pass filter (300 Hz)

51/4" H X 19" Wx 73/8" D

(13.33 cm Hx 48.26 cmWx

18.73 cm D)
23 pounds (10.45 kg)

Black

15095A Plug-in
Line Transformer
15335A Plug-in Bridging
Transformer

Underwriters Laboratories list
ing 209J for Commercial Audio

Systems, File E8783(N)
Underwriters Laboratories list
ing 89MO for Fire Protective
Signaling Systems, File
S2925(N)

ARCHITECT'S AND ENGINEER'S SPECIFICATIONS

The power amplifier shall be capable of operating
from a 100/120/220/240V ac line or from a
24/28V dc battery. The power supply shall auto
matically transfer the power to dc operation if ac
power fails. An octal socket shall be provided on
the rear panel for installation of an accessory line
transformer. The front panel shall be hinged to
permit access to the chassis interior without
removing the amplifier from the equipment rack.

The power amplifier shall meet the following per
formance criteria. Gain, 61 dB. Input sensitivity,

0.8V rms for rated output. Power output, 50 watts
at less than 1% THD from 50 Hz to 12 kHz. Fre

quency response at 1 watt output, ± t dB from 20

Hz to 20 kHz and ± 1 dB 50 Hz to 12 kHz at rated

PRINTED IN U.S.A.

989

output. Input impedance: 15,000 ohms (potenti
ometer), 600 ohms balanced with 15095A plug-in
transformer, 15,000 ohms balanced with 15335A
transformer. Load impedance; 4, 8, 16 and 100
ohms. Load voltage; 14, 20, 28 (25V, 40-watt),
and 70 volts. Output impedance, less than 10% of
nominal load impedance. Noise level, -38 dBm
or 85 dB below rated output. Operating tempera
ture range up to 55°C (13T*F) ambient. Dimen
sions, 5

’/4" H x 19” W X 7 3 /8 ” D. Weight, 23

pounds. Color, black.

The power amplifier shall be Underwriters Labo
ratories listed for use in commercial audio systems
and fire protection signaling systems.

ALTTEIC

LANSING

P.O. BOX 26105, OKLAHOMA CITY, OK 73126-0105, U.S.A

©1989 ALTEC LANSING CORPORATION

REVISION 6

AL-1782

42-07-027036