Altec 911a smc schematic

Page 2

Amplifier Section

Power Output:

Distortion:

Frequency Response:

I FH Power Bandwidth:

Channel Separation:

Damping Factor:

Hum and Noise -

Auxiliary and Tape:

Phono:

Input Sensitivity ,
Phono:
Auxiliary:

Tape Monitor:

High-Frequency Filter:

Tone Control Range:

Both channels driven simul-
taneously 7 44/44 watts
RMS with 8-ohm load
Total 180 watts IHF music
power (90 watts each chan-
nel) with 4-ohm load

Less than 0.5% THD

Less than 0.5% IM (0.5
watt to rated output)

:1 dB from 15 Hz to 45
KHz

15 Hz to 25 KHz
60 dB

30

85 dB below rated output

65 dB below rated output

4.0 mV
250 mV
450 mV
12 dB/octave above 6 KHz

£16 dB at 50 Hz and 15
KHZ

Garrard SL953 Automatic Turntable
(see enclosed Garrard Instruction Manual)

Speeds :

Turntable:

33-1/3, 45 and 78 rpm

Cast aluminum, 12 diam-
eter

Shure M93E Cartridge

Stylus (N93E):

Tracking Force:
Channel Separation:
General

Overall Dimensions:

Power Requirements:

Weight:

Elliptical diamond 0.0007"
x 0.0004

1.5 to 3.0 grams

More than 25 dB at I KHz

6-7/8" H x 19-1/4" W x
19-1/2" D

120V, 50/60 Hz

45 pounds

CONTROLS - INDICATORS - CONNECTIONS -

FUSES

Front Panel
(see Figure 2)

Tuning Control (knob)

Tuning Dial and
Indicator

Center Tuning Meter

STEFl E0 Indicator
(lamp)

VOLUME Control
(matched dual slide)

BALANCE Control
(slidE)

BASS Control
(matched dual slide)

TR EB LE Control
(matched dual slide)

FM (push-on switch)

AM (push-on switch)

Rear Panel
(see Figure 3)

SWITCHED 200

WATTS MAX

(AC power outlet for ex-
ternal equipment)

SPEAKERvI, R/L (spring-
loaded terminal blocks)

SPEAKER-2, R/L (spring-
loaded terminal blocks)

GND (screw terminal)

ANTENNA, FM 3009/AM
(screw terminals)

CENTER CHANNEL
(iack)

Fl ECORDER OUTPUT,
R/L (jacks)

TAPE MON, R/L (jacks)

AUX, R/L (jacks)

PHONO (push-on switch)
SLOW AC I25V-3A (fuse)
AUX (push~on switch)
FAST 3A, R/L (fuses)
TAPE MON (push-on/
push-off switch) Turntable
(see enclosed Garrard In-
HI FILTR (push~on/ struction Manual)

push-off switch)

MUTE (push-on/push-
off switch)

LOUD (push~on/push-
off switch)

MONO (pushcn/push-
off switch)

VOL RANGE (push-on/
pushvoff switch)

SPKR l (push-on/pusn
off switch)

SPKR 2 (pusheon/push-
off switch)

PHONES (jack)

POWER (push-on/push~
off switch)

DESCRIPTION

The ALTEC 911A Stereo AM/FM Music Center con-
tains all the facilities necessary to create a complete
home music center with enough power to drive any
speaker systems - including the lowest efficiency
models. It will receive AM, FM and FM stereo broad-
casts. It contains two complete amplifier systems.
The 911A uses a Garrard SL953 record changer with
a Shure M93E Elliptical High-Track' Cartridge inr
stalled. The inputs, outputs and controls on the
911A provide for the addition of a tape deck or tape
machine. up to four speaker systems, or other op-
tional audio equipment as may be desired. The 911A