Electro voice ev 66 brochure

Page 1

DESCRIPTION

Representing an entirely new and unique approach
to the design of stereo high fidelity components. the
Electro-Voice E-V 66 stereo control amplifier in-
corporates the latest "state of the art electronic
devices and circuitry. To ensure proper operation
of the E-V 66, it is urged that the installation pro-
cedure be followed exactly.

The E-V 66 incorporates twenty-six transistors,

of which fourteen are silicon,and four silicon diodes ~

in the power supply. Extremely cool operation is
assured bydirectconduction 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 use of highest quality transistors and careful
chassis layoutresults in the virtual absence of hum,
hiss, and noise. Wide frequency response, unusually
low distortion, exceptional square wave response.
and other performancecharacteristlcs exhibit little
or no deterioration throughout the entire power out-
put range--up to, and including, full power.

The E-V 66 incorporates Automatic Contour Regu-
lation, a unique tone control circuit (patent pending)
linked to the volume control circuit in a manner
which provides an infinitely-variable loudness com-
pensation. Any amount of boost selected on the
bass and/or treble control is regulated by the volume
control to reduce the amount of boost automatically
as the volume is increased, and raise the amount of
boost as the volume islouercd. Flat orattenuatcd
settings of the tone controls remain unaffected by
changes in the volume control setting. The boost
characteristic of the bass control is exceptionally
useful in compensating for deficiencies in loud-
speaker and room acouslics--even at the maximum
setting where conventional tone controls tend to
sound unpleasantly "boomy".

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F EATU RES

0 All-transistor, solid state circuitry - military
type etched circuit wiring

0 Cool operation provides maximum component life
and greatly reduces ventilation requirements

0 Extremely flat, wide-range frequency response

SPECIFICATIONS
Power Output: 80 watts IH F music power
(40 watts per channel); 160 watts in-
stantaneous peak power.
Frequency Response: 11.5 db; 8 to 50,000 cps
at rated power.
Channel Separation: 40 db minimum at 1000 cps
Harmonic DistortionzLess than 0. 5%at rated output
1M Distortion: Lessthan 0. 5% at rated output
Hum and Noise: High level inputs--better
than 80 db down at rated output.
Magnetic phono input---
better than 70 db down (reference,
10 mv input)
Input Sensitivity: Magnetic phono -- 3 mv
Ceramic phone, tuner, aux, and tape
mouitor~-100 mv
Selector (Phono, Tuner,
Aux): Volume: Balance: Base (+20
db, -20 db at 50 cps)*: Treble (+15
db, -15 db at 10 kc)*; Speaker (On-
Mute)
Output Damping Factor: 50 at 8 ohms

Controls:

Outputs: Speaker (4-8-16 ohms each channel);
stereo tape recorder; stereo head-
phone. "

AuxiliaryAC Outlets: 2 - one switched, one un-
switched.

Power Requirements: 110 - 120 volts, 50 - 60
cycle AC.

Dimensions: 4-3/32" x 12-3/16" x 9-3/4"

Weight: 9-1/2 lbs.

*Figures repiesentmaximum boostatlow volume
settings. (See text (or explanation of Automatic
Contour Regulation circuit.) -

i E- v 66 STEREO
. CONTROL AMPLlFlER

3135135; 7'

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Page 2

CONNECTIONS

Note: The AC power cord should not be plugged in
until alloonnections 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 518 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, Ti, 4-, or otherwise
marked for proper phasing. This terminal should
beconnccted to the amplifier output terminal marked
"4-8-160hms". 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 he done to the
amplifier, a short circuit in the amplifier output
will require the unnecessary and bothersome re-
placing of fuses.

2. Connect program source (tuner, phone, etc.) to
the appropriate pair ofinputjacks 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.

3. The phono cartridge selector switch (above the
phono input jacks) should be placed in either the
ceramic (CER) or magnetic (MAG) position, de-
pending upon the type of cartridge employed in the
record player.

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

5. It a tape machine capable of recording is to be
used in the system, the recordcr'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 inpntjackslabeled 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.

6. Forcouvcuience, two AC outlets are provided on
the rear panel . Auxiliary eouipmentsuch as a tuner.
record player, or tape deck may be connected to
these ontletsnslong as the total power consumption
of the additional units does not exceed 300 watts.

The switched outlet is controlled by the amplifier

V on-off switch; the unswitchcd 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
controls, 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, me left- and right-channel
input signals are fed through the lett- 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-
tiers, 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 swimh may also be used to

compare tape quality to material being recorded _

when used with a tape machine providing off-the-
tape monitoringwhile recording. The tape recorder
instruction book will provide additional details.

SPEAKER ON/M'U'IE SWITCH

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

PHONES JACK

Provides outputlorhighquality stereo headphones. _

Qitput is available at all times, regardless of the
setting of the SPEAKER ON/MUTE switch.