CONTRACTOR PRECISION SERIES
4 Owner‘s Manual
1 Introduction
Electro-Voice‘s new high efficient CONTRACTOR PRECISION SERIES power amps combine uncompromising audio
performance with highest reliabilty.
1.1 Unpacking and Inspection
Carefully open the packaging and take out the power amplifier. Inspect the power amp’s enclosure for damages that might
have happened during transportation. Each amplifier is examined and tested in detail before leaving the manufacturing site to
ensure that it arrives in perfect condition at your place. Please inform the transport company immediately, if the power
amplifier shows any damage. Being the addressee, you are the only person who can claim damages in transit. Keep the
cardboard box and all packaging materials for inspection by the transport company.
Keeping the cardboard box including all packing materials is also recommended, if the power amplifier shows no external
damages.
When shipping the power amp, make sure to always use its original box and packaging materials. Packing the power amplifier
like it was packed by the manufacturer guarantees optimum protection from transport damage.
1.2 Scope of Delivery and Warranty
•
1 Power Amplifier
•
1 Owner‘s Manual (this document)
•
1 Mains Cord
•
1 (CPS4.5/4.10) or 2 (CPS 8.5) Output connectors, 8 pole
•
2 (CPS4.5/4.10) or 4 (CPS 8.5) Input connectors, 6 pole
•
1 Power Remote connector, 2 pole
•
4 Foot Stands
•
1 Warranty Certificate
Keep the original invoice that states the purchase/delivery date together with the warranty certificate at a safe place.
1.3 Features and Description
The power amp CPS4.5/CPS4.10/CPS8.5 is part of Electro-Voice‘s new CONTRACTOR PRECISION SERIES, which marks
another milestone in the design and production of high-performance power amplifiers. The innovative Class H Topology offers
very high and stable output with high efficiency on an high performance level. CPS power ams are ideal for permanent
installation applications. The gapless protection circuitry concept not only prevents the power amp itself but also the
connected loudspeaker systems from being damaged. These extensive protections include Dynamic Audio Limiters, DC/HF-
Protections, Back-EMF-Protection, Inrush Current Limiter, Short Circuit Protection and of course Thermal Overload
Protection. The soft-start function prevents current inrush peaks on the mains, which in addition prevents the mains line
protection switch from activating during power-on operation of the power amplifier. The loudspeaker outputs are activated via
relay switching with a delay of approximately 2 seconds effectively attenuating eventual power-on noise.
1.4 Responsibility of the User
Speaker System Damage
CPS power amps provide extremely high power output that might be dangerous for human beings as well as for the
connected speaker systems. High output voltages can damage or even destroy the connected speaker systems, especially,
when the CPS amplifier is operated in bridged mode. Prior to connecting any loudspeakers, make sure to check the speaker
system’s specifications for continuous and peak power handling capacities. Even if amplification has been reduced through
lowering the input level controls on the amplifier’s front panel, it is still possible to achieve full power output with a sufficiently
high input signal.
Danger at the Loudspeaker/Power Outputs
CPS amplifiers are capable of producing dangerously high voltage output that is present at the output connectors. To protect
yourself from electric shock, do not touch any blank speaker cables during operation of the power amp.
CAUTION:
Do not ship the power amp in any other but its original packaging.
preliminary
