Electro voice ev 44 brochure

Page 1

DESCRIPTION

Representing an entirely new and unique approach
to the design ofstereo high fidelity components, the
Elcctru- Voice E-V 4-1 stereo control amplifier in-
corporates the latest "state of the art" electronic
devices and circuitry. To ensure proper operation
of thc E-V 44. it is urged that the installation pro-
cedure be followed exactly.

The E-V +4 incorporates sixteen iranslsmrs, of
which eight are silicon, and four silicon diodes in
the power supply. Extremely cool operation is
assured by directconduction of the small amount of
heat from the output transistors to the unit's heavy
base plate. All components operate well within
their rated temperature range. insuring long life
and exceptional stability.

The um of highest quality transistors and careful
chassislayoutresults in the virtual absence ofhum,
hiss, and noise. \\ide frequency response,unusually
low distortion, exceptional square-wave response,
and other performance characteristics exhibit little
or no deterioration throughout the entire power out-
put ranges-up to, and including, full power.

The model E-V it incorporates an automatic low-
irequency loudness compensation which maintains
proper tonal balance at low-volume settings...

SPECIFICATIONS
Power Output: 40 watts 1111 music power (40 watts

per channel); 80 watts instantaneous
punk power.

FEATURES
I All-transistor, solid state circuitry - military
type etched-circuit wiring.

a Cool operation provides maximum componentlife
and greatly reduces ventilation requirements.

0 Extremely flat, wide-range frequency response.

Frequency Response: 11.5 db;10 to 40,000 cps at

rated power.
Channel Separation: 40 db minimum at
1000 cps.
Harmonic Distortion: Less than 0.5% at rated
output.

Less than 1% at
rated output.

1M Distortion:

Hum and Noise:
High Level inputs--better than 70 db
down at rated output.
Magnetic Phone input-better than 60
db down (reference. 10
mv input)
Input Sensitivity:
Magnetic phono - 5 mv
Ceramic phono. tuner, aux, and
tape monitor -- 100 mv.
Selector (phono. tuner, aux)
Volume: Balance; Bass (+12 db,
-16 db at 50 cps); Treble(+12 db,
~16 db at 10 kc); Speaker (On-
Mute)
Output Damping Factor:
Outputs:

Controls:

50 at 8 ohms

stereo mpe recorder; stereo head-
phone.
Auxiliary AC Outlets: 2; one switched, one
unswitched.
110 - 120 volts,
50 - GO cycle AC
4-3/32" x 12-3/16" x 9-3/4"
8 pounds

Power Requirements:

Dimensions:
Net Weight:

-V 44 STEREO
CONTROL AMPLIFIER

Speaker (48-16 ohms each channel):

HEIdl'ldINV 1OHLNOO 03831.8 7? A'E

Page 2

CONNECTIONS

Note: The AC power cord should not be plugged in
until all connections and initial control settings have
been made.

1. Connect the right- and left-channel speakers to
the right- and left-channel amplifier terminals, re-
spectively. Ordinary s18 lamp- or "zip" cord is
satisfactory. In order to ensure proper stereo ef-
fect, make certain that the speakers are phased
correctly. Most speakers and speaker systems
have one terminal coded red, T1, +_ or otherwise
marked for proper phasing. This terminal should
be connected to the amplifier output terminal marked
"4-8-16 ohms". The amplifiercommon terminal.
marked "COM, should be connected to the black,
T2, -, or unmarked speaker terminal. Care should
be taken to keep the speaker wires from touching
each other either at the amplifier or the speaker
terminals. Although no harm will be done to the
amplifier, 3 short circuit in the amplifier output
will require the unnecessary and bothersome re-
placing of fuses.

2. Connectprogram source (tuner, phone, etc.) to
the appropriate pair of inputjacks on the rear panel.
The left jack of each pair is the input for the left
channel; the right jack of each pair feeds the right
channel. If a monophonic source such as a mono
tuner is employed, it may be connected to either
channel input. If the record player has a magnetic
cartridge, connect it to the MAG PHONO input. A
ceramic cartridge should be connected to the CERA-
MIC PHONO input. Note: Connecting cartridges to
both phono inputs at the same time will cause im-
proper operation.

3 . Normallya separate ground wire is required be-
tween an amplifier and a record player to reduce
hum. This wire should be connected to the SYSTEM
GROUND screw on the amplifier rear panel.

4. If a tape machine capable of recording is to be
used inthe system, the recorder's high level inputs
should be connected to the amplifier jacks labeled
OUTPUT T0 TAPE RECORDER. High level out-
put from the recorder should be connected to the
amplifier inputjacks labeled TAPE. The gain of this
input is designed for tape recorders with built-in
playback electronics; it will not operate directly
from a tape head. -

5. For convenience. two AC outlets are provided on
the rear panel. Auxiliary equipment such as a tuner,
record player, or tape deck may be connected to
these outlets as long as the total power consumption
of the additional units does not exceed 300 watts.
The switched outlet is controlled by,the amplifier

on-ofl' switch; the unswitched outlet is on at all
times. Normally a mechanical device such as a
record player or tape machine should be connected
to the unswitched outlet so that it cannot be turned
off at the amplifier with the mechanism engaged.

Before plugging in the amplifier, read through the
following section to become familiar with front panel
conlIols. in addition to the initial settings.

CONTROL FUNCTIONS

POWER ON/OFF

Controls the main AC power to the amplifier in ad-
dition to any equipment connected to the switched
AC convenience outlet on the rear panel. This
switch should be in the OFF position before con-
necting the line cord toAC power, and should be in
the OFF position whenever any connection changes
to the amplifier or associated equipment are made.

MONO/STEREO SWITCH

Inthe STEREO position, the lefts and right-channel
input signals are fed through the left- and right«
channel amplifiers to their respective speakers.
In the MONO position, the left- and right-channel
inputs are combined and fed through both ampli-
fiers, with the resulting signal routed to both the
left and right speakers. Similarly, a mono source
connected to either a left- or right-channel input
will be fed to both amplifier channels and then to
both speakers. Either position may be used initi-
ally, depending upon the program source available.

SOURCE/TAPE SWITCH

In the SOURCE position, the signal being fed to the
speakers (phone, tuner, auxiliary) is selected by
the SELECTOR switch. The TAPE position selects
the tape input (regardless of the position of the
SELECTOR switch) for playback from a tape re-
corder. NOTE: This switch may also be used to
compare tape quality to material being recorded
when used with a tape machine providing off-the-
mpe monitoringwhile recording. The tape recorder
instruction book will provide additional details.

SPEAKER ON/MUTE SWITCH

In the MUTE position, the switch silences both
speakers so that headphones may be used for pri-
vate listening. Althoughno harm will b'edone to the
amplifier if this switchisleft in the MUTE position,
it is suggested that the speakers he turned on after
listening with headphones, so that a person un-
familiar with the equipment will have no difficulty
operating the system.

PHONES JACK

Provides outputior high-quality stereo headphones.
Qitput is available at all times, regardless of the
setting of the SPEAKER ON/MUI'E switch.