Altec Lansing 1590E User Manual

A

LANSING®

1590E

Power Amplifier

SPECIFICATIONS

KEY FEATURES

★ DC Voltage Backup Ensures

Uninterrupted Operation

★ Switchable High-Pass Filter

Gain:
Input Sensitivity;
Power Output:

Frequency Response;

Input Impedance;

Load Impedance:
Load Voltage:
Output Impedance:

67 dB.

0.8 Vrms for rated output.
200 watts at less than 1% THD

from 50 Hz to 12 kHz.
±1 dB, 20 Hz to 20 kHz at 1 watt

output.
±1 dB, 50 Hz to 12 kHz at rated
output.

15 kohms.
15 kohms balanced with 15335A
Line Transformer.
150/600 ohms balanced with
15095A Line Transformer.

25, 50,100, and 200 ohms.

70.7,100,140 and 200 volts.
Less than 25% of nominal load

impedance.

DESCRIPTION

The Altec Lansing
designed for applications where uninterrupted operation
is a priority. The

1590E

less than 1% total harmonic distortion (THD) from 50 Hz
to 12 kHz, and has a frequency response of -1 dB from
20 Hz to 20 kHz at one watt output. Output transformer
taps provide connections for 70.7, 100, 140 and 200
volt line distribution systems.

The

1590E

features silicon solid-state circuitry, a
switchable high-pass filter for use in speech systems,
input connections for high impedance devices and for

150/600 ohm or 15,000 ohm balanced inputs, fail-safe
protection for output transistors, and a hinged front
panel for rapid access to the chassis interior.

The

1590E

is capable of operation from a negative
grounded 24/28 V DC source. The
for use in commercial audio systems and fire protective
signaling systems.

Designed for rack-mounted use, the

six units of vertical space. 10.5 inches (26.7 cm).

1590E

Power Amplifier is

provides 200 watts of power at

1590E

is UL listed

1590E

occupies

Noise Level:

Operating
Temperature Range:

Controls:

Power Required:

Special Features:

Output noise 85 dB below rated
output.

Upto55°C(131°F).
1 VOLUME control, continuously

variable.

1 power OFF-ON switch.
1 high-pass filter switch.

100/120/220/240 AC, 50/60 Hz,

25 Wat zero signal,
420Wat 200Woutput,
24/28 V DC (battery (-) is ground),

0.2 A at zero signal,
14 A at 200 W output.

Automatic transfer from AC to DC
power in the event of AC power
failure.
Dissipation sensing circuit for
protection of output transistors.
High-pass filters.

-or-

CONDUIT

. KNOCKOUTS

FOR SPEAKER
WIRING

TRANSFORMER
ACCESSORY
RECEPTACLE

The input leads are connected to terminals
3 and 4 of the INPUT terminal board (see
Figure 4).

When shipped from the factory, pins 3 and 4
of J1 are strapped together to provide a
600-ohm Input. A 150-ohm Input may be
obtained by removing the strap from pins 3
and 4 and then strapping pin 1 to 4, and
strapping pin 3 to 6 (see Figure 5).

Both the direct and transformer Isolated
inputs may be used simultaneously If Isola
tion resistors are Installed In either or both
input lines, to prevent one Input source

from short circuiting to the other.

I I

VOLTAGE ' _
RATING BATTERY
NAMEPLATE TERMINAL

BOARD

BATTERY
FUSE

HEAT SINK
SHROUD

Figure 2. Rear View of 1590 Power Amplifier

Terminal Block TB8/TB9 Connections
Transformer T1
Wire Color 100 V 120 V
Brown TB9-4 TB8-4 TB8-4

White

Black TB9-7 TB9-7
White-Brown
White-Black

Permanent AC Power Connections*
Pilot Light S2-4

AC Cord (black)
AC Cord (white)
Switch SW2-3
Fuse FI-2
Capacitor C7
Capacitor C6

*Do not make any wiring changes of

these wire connections when altering
the amplifier for different primary
power operating voltage.

TB8-4 TB9-4

TB9-1 TB8-3 TB9-4
TB9-8

TB9-8 TB9-8

TB9-6
TB8-9
TB9-9
TB8-5
TB8-8
TB9-10
TB8-10

240V

TB9-2
TB9-5

Figure 3. Primary Power Conversion Chart

for 100V, 120V, and 240V 50/60 Hz Operation

4. Select the appropriate voltage rating
label from the rating label strip supplied
with the amplifier. Affix label over pre

vious voltage rating designation on
chassis. See Figure 2.

INPUT

INPUT

0 0

SHIELD

Figure 4. Input Connections

INPUT

TERMINAL

FILTER
SWITCH

5. When 1590 is strapped for 200V or 240V
line power, replace front panel fuse (FI)
with 2A, 250V, slo-blo type fuse.

6. Close front panel and secure with four
screws previously removed.

BOARD

Battery Connections

If desired, the 1590 may be connected to an
external 24/28 volt battery with minus (-)
as ground. Terminals for the dc power con
nections are on TB4 (see Figure 2). If ac
power fails, transfer to dc power Is instan
taneous, autoamtic and silent. The battery
ower supply Is not operated by the primary
power ON-OFF switch on the front panel. If
switching of battery power Is desired, an
external relay or switch should be provided
by the user.

Input Connections

Input connections may be either direct or
transformer-isolated at the INPUT terminal
board (TB1) (see Figure 2). Direct coupling
Is accomplished by connecting the Input
leads (shielded conductor recommended)
to terminals 1 and 2. Terminal 2 Is ground

(see Figure 4).

For transformer-isolated input, a plug-in
15095A or 15335A Line Transformer must be
plugged into receptacle J1 (see Figure 2).

DIRECT CONNECTION

1. For unbalanced high-impedance sources.

2. For bridging unbalanced low-impedance
lines having signal voltages of 0.8V rms

or higher.

TRANSFORMER ISOLATED CONNECTION

1. For balanced or unbalanced lines of 150

or 600 ohms* up to level of + 15 dBm
(with 15095A Line Transformer),

2. For low-impedance line bridging input or
15,000 ohm line-matching input (with
15335A Line Transformer),

'Factory wiring at receptacle J1 Is for 600

ohms (see Figure 5).

150 ÍÍ WIRING

600Í2 WIRING

Figure 5. Wiring of Transformer Accessory
Receptacle for Input Impedance of 150 or

600 Ohms. Factory Wiring Is for 600 Ohms

Output Connections

Output transformer taps provide connec
tions tor 25V (140 watts), 30V, 70.7V, 100V,
140V and 200V distribution systems. Class I
wiring must be used for 100V, 140V and
200V systems. Class II wiring may be used
only for the 30V and 70V systems. Connec
tions are made at terminal board TB2
located within the chassis (see Figure 6).

Wiring from the speaker system feeds

through the chassis to TB2; Vi" conduit
knockouts In the chassis provide access to
output terminals of TB2 and permit termina
tion as required for Class I wiring (see Fig
ure 2).

Recommended wire size for 200V operation
is 18 gauge (solid or stranded), for which
power loss Is V2 dB per 1900 feet of paired
wire. When rigid conduit is not used clamp­type cable connectors must be Installed in
the conduit knockouts to secure the cable
and provide strain relief.

NOTE-

Typical clamp-type cable connectors
are the Appleton CG-1850 (for Class I
flexible cord such as type SV or SVT),
and the Appleton CG-1250 (for Class
II audio cable usch as Alpha Wire
Corp. No. 1897 [stranded] or No. 1797
[solid]).

After speaker distribution wires are passed
to the site of TB2, quick-connect terminal
clips (T&B type RA257) must be installed.
Be sure that output wiring between knock
outs and TB2 does not exceed 9 Inches In
length. Strip '/*" Insulation from the wire
ends and install the terminal clips. Twist
stranded wire to assure that all strands
properly enter the sleeve of the terminal
clip. Use an appropriate crimping tool (such
as M. Klein & Sons #1002) to crimp the
terminal clips to the wire ends.

Connect terminal clips to the terminals of
TB2 which have the desired Impedance. If
total speaker system Impedance falls be
tween two rated output values of the 1590,

-2-