Behringer A4400 Benutzerhandbuch
8
WARNING!
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It should be pointed out, that extreme output volumes may damage your ears and/or your
headphone set. Turn down the LEVEL controls before you switch on the unit.
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The following operational manual will introduce you to the BEHRINGER POWERPLAY PRO
and its various functions. After reading the manual carefully, make sure it is always on hand
for future reference.
2. THE DESIGN CONCEPT
2.1 High quality components and design
The philosophy behind BEHRINGER products guarantees a no-compromise circuit design and employs the
best choice of components. The operational amplifiers NJM4580 which are used in the POWERPLAY PRO,
are exceptional. They boast extreme linearity and very low distortion characteristics. To complement this
design the choice of components includes high tolerance resistors and capacitors, detent potentiometers and
several other stringently selected elements.
2.2 Inputs and outputs
2.2.1 Balanced MAIN inputs
As standard, the BEHRINGER POWERPLAY PRO is installed with electronically servo-balanced MAIN
As standard, the BEHRINGER POWERPLAY PRO is installed with electronically servo-balanced MAIN
inputs. The new circuit design features automatic hum and noise reduction for balanced signals and thus
allows for trouble-free operation, even at high operating levels. Externally induced mains hum etc. will be
effectively suppressed. The automatic servo-function recognizes the presence of unbalanced connectors and
adjusts the nominal level internally to avoid level differences between the input and output signals (correction
6 dB).
3. INSTALLATION
Your BEHRINGER POWERPLAY PRO was carefully packed in the factory and the packaging was designed
to protect the unit from rough handling. Nevertheless, we recommend that you carefully examine the packaging
and ist contents for any signs of physical damage, which may have occurred in transit.
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If the unit is damaged, please do not return it to us, but notify your dealer and the shipping
company immediately, otherwise claims for damage or replacement may not be granted.
Shipping claims must be made by the consignee.
3.1 Rack mounting
The BEHRINGER POWERPLAY PRO fits into one standard 19" rack unit of space (1 3/4"). Please allow at
least an additional 4" depth for the connectors on the back panel. Be sure that there is enough air space
around the unit for cooling and please do not place the POWERPLAY PRO on high temperature devices such
as power amplifiers etc. to avoid overheating.
3.2 Mains voltage
Before you connect your POWERPLAY PRO to the mains, please make sure that your local voltage
matches the voltage required by the unit! The fuse holder on the female mains connector has 3 triangular
markers, with two of these triangles opposing each other. Your POWERPLAY PRO is set to the operating
voltage printed next to these markers, and can be set to another voltage by turning the fuse holder by 180°.
CAUTION: this instruction does not apply to export models exclusively designed, e.g. for 115 V
operation!
2. THE DESIGN CONCEPT