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COMPOSER PRO MDX2200
1.1 Before you begin
The BEHRINGER COMPOSER PRO MDX2200 was carefully packed in the factory, in order to ensure safe
transport. Nevertheless, should the box show signs of damage please check the equipment itself immediately
for any signs of external damage.
+ 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.
Be sure that there is enough space around the unit for cooling and please do not place the COMPOSER PRO
on high-temperature devices such as power amplifiers, etc. to avoid overheating.
+ Before connecting the COMPOSER PRO to the mains, please carefully check that your
equipment is set to the correct supply voltage!
The fuse holder on the female mains connector has 3 triangular markings. Two of these triangles are opposite
each other. The MDX2200 is set to the operating voltage shown next to these markings. It can be set to another
voltage by turning the fuse holder through 180°. CAUTION: this does not apply to export models, which
were designed e.g. only for a mains voltage of 115 V!
Connection to the mains is made by means of a mains cable with an IEC receptacle which complies with the
appropriate safety regulations.
+ Please note that all units must be grounded properly. For your own safety, you should never
remove any ground connectors from electrical devices or power cords or render them in-
operative.
1.2 Design concept
1.2.1 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 COMPOSER PRO, are
exceptional. They boast extreme linearity and very low distortion characteristics. The most important aspect of
the COMPOSER PRO design is a radical VCA implementation which results in outstanding technical
specification and excellent performance. To complement this design the choice of components includes high
tolerance resistors and capacitors, detent potentiometers, gold plated relay contacts and several other
stringently selected elements.
For the first time, the COMPOSER PRO MDX 2200 uses SMD technology (Surface Mounted Device). These
sub-miniature components known from aerospace technology allow for an extreme packing density, plus the
units reliability could be improved. Additionally, the unit is manufactured in compliance with a ISO9000
certified management system.
1.2.2 Failsafe relays
Failsafe relays have been incorporated into the design of the BEHRINGER COMPOSER PRO, which
automatically and silently bypass the unit in the event of power supply disconnection or failure. These relays
are also active at switch-on to isolate the COMPOSER PRO until the power rails have settled, thus preventing
the possibility of a potentially damaging switch-on thump.
1.2.3 Balanced inputs and outputs
As standard, the BEHRINGER COMPOSER PRO is installed with electronically servo-balanced inputs and
outputs. 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
6dB).
1. INTRODUCTION