PAGE #22
"12000" SERIES
this preferred method of coupling is direct and eliminates the often troublesome coupling com-
ponents. The pre-amplifier is equipped with an input for accommodating a high impedance type
record player and an input for accommodating a high impedance type microphone. Two stages of
non-microphonic amplification are afforded by this pre-amplifier which provides ample signal for
transmission to and driving of the power amplifiers. The "12111" is compact but with all com-
ponents readily accessible for service. All electronic components are of the best quality,
utilized within ultra-conservative ratings. (See illustration on Page 20.)
The P.E.C. "12030" Amplification system, illustrated on Page 20 is one of a series of various
capacities to permit tailoring the audio power capacity to the exact theatre requirements. (See
"Variations" on Page 23.) Thus adequate power is assured for a specific installation, as can be
adequate light by the careful, coordinated selection of arc-light source. A thoroughly co-
ordinated system - with no weak links - is available with the simultaneous and very important
advantage of maximum economy. The "12030" consisting of a monitor section, an equalizer section
and of four power amplifier sections, all neatly housed in an attractively finished 18" x 22" x
66" steel cabinet, will produce 80 watts of audio power at 2% distortion, which coupled to an
adequate two-way speaker system will accommodate an auditorium seating 3,700 persons. (See il-
lustrations on Page 20.)
The "12107" Equalizer is a two-stage section with its self-contained power supply to permit,
without the loss of power, the warping of the frequency response to suit almost all auditor-
ium conditions, through the simple operation of the high frequency control and of the low
frequency control.
The "12110" Monitor Section utilizes its own stage of amplification with self-contained power
supply, so as to draw no power from the stage speakers. Volume from the 8" monitor speaker is
adjusted to booth requirements by an individual control.
Each of the four "12106" Power Sections have all components self-contained and may be utilized
individually or in multiple. Output impedances are 8, 16, 250, and 500 ohms to match per-
fectly most speaker systems. Speaker systems are not included in this "12000" prospectus.
Each section of the "12030" "flips out" for easy servicing as shown in the illustration on Page
20. The "12030" is another link in the coordinated P.E.C. 35mm Motion Picture Sound Projection
Systems.
As in most things, there is no royal road, economic or technical, to the coordinated practices
essential to good 35mm motion picture sound projection engineering and production, but P.E.C.
products most nearly represent the ideal medium.
CONSERVATIVE APPLICATIONS:
For the projection of 35mm motion picture film with the conventional optical sound track; indoors
and outdoors; the following listed combination is recommended where a picture of excellent bril-
liance, size 18.18' x 25', is adequate and where the seating capacity does not exceed 3,700 per-
sons. For larger and smaller applications see "VARIATIONS" on Page 23.
ELECTRICAL POWER REQUIREMENTS FOR DUAL "12000" SYSTEM LISTED BELOW:
115 Volt, 1 phase, 60 cycle current - Ideal: 3.2 K.V.A.; Minimum: 1.8 K.V.A.
"12000" Series Equipment also available on special order for operation from:
115 Volt, 1 phase, 25 cycle current
115 Volt, 1 phase, 40 cycle current
115 Volt, 1 phase, 50 cycle current - Same price as 60 cycle.
Operation from 220 volt current requires a step-down transformer in accordance with the above
frequencies and wattages.
Arc lighting equipment, dependent upon type selected, requires up to 6 K.V.A. per lamp - preferred:
220 volt, 3 phase of required frequency; alternative: 220 volt, 1 phase of required frequency.
ORDERING DATA:
For operation from 115 volt, single phase, 60 cycle current, or from 115 volt, single phase, 50
cycle current - but not from both - Specify one.