Dynacord Power Mixer PowerMate 1600 Owner's Manual page 20

MASTER
STEREO POWER AMPLIFIER
The PROCESSED COMPACT PRECISION stereo power amplifier of the PowerMate has been designed in discreet
bipolar technology to provide a nominal output power of 700 watts into 4 ohms per channel. The minimal load
impedance of 2.7 ohms allows the operation with a maximum of three 8 ohms loudspeaker systems connected in
parallel to each output channel.Their low distortion rate and inter-modulation provide the amplifiers of the PowerMate
with outstanding transmission capabilities that do not have to fear the comparison with professional high-end, stand-
alone audio power amplifiers. The transmission qualities of CL power amps are simply extraordinary. Optimised
power supply units employing low-leakage toroidal transformers and the consistent use of Class-H technology
provide extensive headroom far above the stated nominal output. At the same time this contributes to a reduction in
weight and leakage power.
Characteristic for the Class-H power amplifier design of the PowerMate is its extremely fast, signal-dependent
operating voltage switching, which results in doubling the regular supply voltage when needed. In comparison to
Class-AB power amps, Class-H power amps generate by far less leakage power at identical output. Consequently,
reduced leakage power or dissipation is synonymous to less waste heat – energy is used more efficiently and the
power consumption stays clearly below that of conventional Class-AB operation. As a result, installing Class-H
power amps within rack shelf systems is possible with less space between appliances.
The power amplifier of the PowerMate is designed to live through the hardwearing use in the touring business. It
incorporates protection circuitry against thermal and capacitive overload and short circuit as well as against HF-
interference and DC at the outputs. Further protection of the power output stage against back-feed of electrical
energy (BACK-EMF) is provided through special circuitry. When the PowerMate is switched on, a relay controls
the delayed switching of the power outputs. The internal fans run shortly at full speed, acoustically signaling that
the PowerMate is operational. Limiter circuitry (soft start) controls the initial current inrush, preventing the mains
fuse from being blown during power-on. Two 3-speed fans (off/slow/fast) guarantee absolute thermal stability at low
running noise. The ventilation is directed front-to-rear allowing trouble-free operation even in very compact amp-
racks.
The extensive comparator circuitry constantly monitors the input and output signals of the PowerMate's power amp
and activates the internal limiters whenever a non-linear operational state is encountered. This provides reliable
protection of the connected loudspeaker systems against overload and clipping. Distortion is not intelligible even
when the maximum input level is overridden. The amplifier of the PowerMate additionally incorporates LPN-filters
(DYNACORD patent). Together with the 12dB Hi-Pass filters, these Low Pass Notch filters eliminate faults in the
transient response of typical sound reinforcement speaker systems and provide your setup with an extraordinarily
precise and powerful reproduction of low frequencies.
61. FOOTSWITCH
Phone jack for the connection of an optionally available DYNACORD FS11 (110
693) footswitch to switch the effect mode of the internal FX units on or off. To
accomplish this function, the FX1 and FX2 ON switches have to be engaged.
To remotely control the effects units using only a single footswitch, the FS11 has
to be connected to the FX1/GLOBAL connector. Both FX units are simultaneously
switched. This function is useful for example when switching from vocal performance
to announcer.
When remotely controlling the FX units using two footswitches, one FS11 needs to
be connected to the FX1/GLOBAL and the other to the FX2 connector. Now, the two
effects units can be switched independently, which is mostly used to switch between
different effects settings during a performance.
62. LAMP XLR
This XLR-type socket provides a DC voltage of 12V/
5 watts and is meant for the connection of a
gooseneck lamp (litlite). Please make sure that
the used lamp complies with the here mentioned
specifications and pin assignment. Overload or
short circuit can result in damaging this output. To
prevent this from happening, we recommend the
use of the gooseneck lamp (112700), available from
the DYNACORD accessory assortment. For further
information, please consult your local dealer.
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