Electro voice p1200 pwramp

Page 1

EIeclroTVoice®

OWNERS MANUAL

P 1200

PRECISION SERIES

Page 2

DESCRIPTION

DESCRIPTION

Thank you very much for choosing an EV PRECISION SERIES amplifier. We are sure it wrll give you
many years of satisfying performance.

EV power amplifiers 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 socclled 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 finish. 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 ccnstamly compare the power amplifiers' 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 amplifiers feature excellent transmission properties. The
power amplifier topology also makes for extremely low distortion rates. Distortion factor (THD). interme
dulation distortion (SM PTE-IM) and transient intermcdulaticn distortion (DIM 30 and DIM 100) are so low
that they are only detectable with the most sophisticated measuring equipment. Generously tfimensicned
power supplies with low-leakage toroidal-core transformers provide considerable headroom well above
the nominal ratings. V/l foldback limiter circuits were deliberately not included in the PRECISION SERIES
power amplifiers 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 retrofitted).
Direct Cuts in the form of XLR connectors (male), to loop the signal through. are also standard features.
The modes DUAUStereo or PARALLEL/Mono can be selected via the Input Routing Switch. Furthermore,
the PRECISION SERIES power amplifiers can also be operated in "Mono Bridged' mode.

The front panel aocomrnodates the dBcalibrated 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. Forthe 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 filters. 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-torear airflow. facilitating operation in large and narrow
amplifier racks.

This Owners 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 amplifier of the
PRECISION SERIES from EV will give you great pleasure.