Dynacord LX 1600, Руководство пользователя

Страница: 4 / 36

Congratulations! With buying an DYNACORD LX power amplifier you have chosen a state-of-the-art
appliance that employs most advanced technology.
LX power amps combine outstanding audio performance, highest reliability and operational safety.
DESCRIPTION
The audio performance of LX power amps are simply extraordinary. The new switchmode power supply
technology, completely designed from scratch and the consistent use of Class-H technology provide
extensive headroom far above the stated nominal output and conspicuous reduction in leakage power
at the same time.
The employed switching power supply combines the headroom-advantage of a transformer power
amplifier with low weight of a pulsed power supply unit resulting in an improved performance-to-weight
ratio. Special attention had been given to high efficiency and interference immunity already in the
designing stage with the result that trouble-free operation of LX power amps is possible even in EMV-
critical environments.
The power amplification stages of the LX amps follow Class-H technology design, i.e. the power amp
provides extremely fast, signal-dependent operating voltage switching, which, results in doubling
the regular supply voltage when needed. Compared to Class-AB power amps, Class-H power amps
generate by far less power dissipation at identical output. Consequently, reduced leakage power or
dissipation is synonymous to less waste heat. In other words: energy is used more efficiently! As a result,
installing Class-H power amps within rack shelf systems is possible with less space between appliances.
In addition to that and despite offering identical output, power consumption is a lot less than in Class-AB
operation.
Being protected against thermal and electrical overload, short circuit and the occurrence of HF/DC at
the outputs, DYNACORD LX power amps fulfill even the most demanding requirements of Pro-Audio
touring applications. Back-EMF-Protection eliminates the risk of the output transistors being damaged
by electrical energy back-feed. The power outputs are switched via relay with a time delay during soft-
start and an inrush current limiter additionally prevents mains fuses from blowing.
Mechanical construction and workmanship also comply with the highest precision manufacturing
standards. The robust chassis is extremely rigid which makes it especially suitable for wearing
touring applications. Two three-speed high performance fans (off/slow/fast) guarantee outstanding
thermal stability at absolute low running noise. Front-to-rear ventilation allows trouble-free operation
even in smaller amp-racks. The electronically balanced inputs are carried out via XLR-type
connectors. Direct-Outs for through connecting the audio signal are also provided via XLRM-type
connectors. Input Routing allows selecting DUAL (stereo) or PARALLEL (monaural) operation
mode. By means of the separate BRIDGED OUT-connector and a Bridged Mode-switch, switching
to “Mono Bridged” operation is truly uncomplicated as well. The recessed mounted dB-scaled
level controls ensure reliable protection against mechanical damage. These particularly precise,
secure to operate detent-potentiometers are located on the front panel. LX power amps provide the
opportunity for retrofitting an internal analogue signal processor board with x-over and filter functions.
The easily readable LED display provides a quick overview of the power amp’s current operational
status. The power outputs CHANNEL A, CHANNEL B and BRIDGED OUT are carried out as extremely
durable SPEAKON-type connectors. Also located on the rear panel is a Ground-lift switch, which, when
needed, helps eliminating ground-noise loops by separating the power amp’s enclosure from the circuit
ground. In normal operation, all LX power amps are capable of driving loads as low as 2ohms. In Mono-
Bridged mode the allowable minimum load is 4ohms.
This owner’s manual outlines and explains several other features of your LX power amplifier. Please,
make sure to carefully read all of it and mind the instructions.
4