Electro-Voice P1200 - Product Description and Warranty; Description

UNPACKING & WARRANTY
Carefully open the packaging and take out the power amplier. Next to the power amplier itself, the
package also includes this owner’s manual, a mains cord and the warranty certicate. Keep the original
invoice, which states the purchase/delivery date together with the warranty certicate at a safe place.
DESCRIPTION
Thank you very much for choosing an EV PRECISION SERIES amplier. We are sure it will give you
many years of satisfying performance.
EV power ampliers of the PRECISION SERIES meet the stringent requirements of tough touring
applications. They are protected against over-temperature, overload, shorted outputs, radio frequency
interference and DC faults. The power transistors are protected from damage from reverse feeding of
electrical energy by means of an additional special protective circuit. For the so-called soft-start, the
power outputs are switched on delayed via relays. An inrush current limiter circuit prevents the mains
fuses from being blown.
Maximum precision is also guaranteed as regards mechanical construction and nish. The robust steel
chassis features remarkable torsion resistance and is specially designed to cope with the tough wear
and tear associated with going on tour. Thermal stability is guaranteed by several low noise 3-stage
fans which also means that they can be used inside the studio.
Comparator circuits constantly compare the power ampliers’ input and output signal and control
the limiters under non-linear operating conditions. They protect the loudspeakers from overload due
to power stage clipping. The PRECISION SERIES power ampliers feature excellent transmission
properties. The power amplier topology also makes for extremely low distortion rates. Distortion factor
(THD), intermodulation distortion (SMPTE-IM) and transient intermodulation distortion (DIM 30 and
DIM 100) are so low that they are only detectable with the most sophisticated measuring equipment.
Generously dimensioned power supplies with low-leakage toroidal-core transformers provide
considerable headroom well above the nominal ratings. V/I foldback limiter circuits were deliberately
not included in the PRECISION SERIES power ampliers to facilitate operation at complex loads up to
a phase angle of +/- 90°.
The inputs are electronically balanced on XLR connectors. (Isolation transformers can be retrotted).
Direct Outs in the form of XLR connectors (male), to loop the signal through, are also standard
features. The modes DUAL/Stereo or PARALLEL/Mono can be selected via the Input Routing Switch.
Furthermore, the PRECISION SERIES power ampliers can also be operated in “Mono Bridged”
mode.
The front panel accommodates the dB-calibrated input Gain controls which are designed as especially
precise and safe-to-operate detented potentiometers. The LED display provides information about
the power amplifers’ operating status. For the two channels, they demonstrate readiness to operate,
whether there is a signal at the input or output, when the Limiters have been activated and whether
one of the protective features has been triggered. The power outputs Channel A, Channel B and
Bridged Out are available on Speakon connectors. The rear side of the unit accommodates the ON/
OFF switches for the integrated Hi and Lo cut lters, a groundlift switch which separates the housing
from the circuit ground thus helping to prevent hum loops and the operating modes selector to mono
bridged operation. They also feature extremely quiet fans with front-to-rear airow, facilitating operation
in large and narrow amplier racks.
This Owner’s Manual is meant to help you familiarize yourself with all the PRECISION SERIES’ other
features. Please read it through carefully and we guarantee that your new power amplier of the
PRECISION SERIES from EV will give you great pleasure.
4