HK Audio VX 2400 - Manual (Page 4)

VX Manual 1.2
1 Content
1 Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2 VX Series Power Amps . . . . . . . . . . . . . . . . . . . . .4
2.1 Welcome into the HK Audio family! . . . . . . . . . .4
2.2 Protective Functions . . . . . . . . . . . . . . . . . . . . .4
2.2.1 Short Circuit . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.2.2 Overheating . . . . . . . . . . . . . . . . . . . . . . . . . .4
2.2.3 Direct Current . . . . . . . . . . . . . . . . . . . . . . . . .5
2.3 Rack Mounting . . . . . . . . . . . . . . . . . . . . . . . . . .5
3 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.1 Master Switch . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.2 Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.3 Input Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.4 Protect LED . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3.5 Clip LED's . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.6 Active LED's . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.1 Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.2 Ground-lift Switch . . . . . . . . . . . . . . . . . . . . . . .6
4.3 Mode Switch . . . . . . . . . . . . . . . . . . . . . . . . . . .6
4.4 Limiter Button . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.5 Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.6 Mains Socket . . . . . . . . . . . . . . . . . . . . . . . . . . .7
4.7 Impedance Switch (models VX 800 and
VX 1200 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
5 Technical Specifications . . . . . . . . . . . . . . . . . . . .8
2 VX Series Power Amps
2.1 Welcome into the HK Audio family!
The new HK AUDIO VX Series of professional power
amplifiers combine modern design features with
utmost durability and reliability to guarantee depen-
dable, totally trouble-free service for many years to
come. Its low weight, compact dual-rack space
design and a solid chassis designed to withstand the
rigors of gigs and touring contribute to both
handling ease and a long life on the road.
While we were developing the VX power amps, we
were particularly intent in not only providing you
with plenty of output power, but also made sure your
amp has greater headroom reserves for as distorti-
on-free signal as possible. These features enable the
kind of transparent, accurate response required in
the age of digital signal sources.
To assure maximum reliability, all VX power amps
undergo extensive quality control checks by both
man and machine. Our engineers inspect every amp
when it comes off the assembly line and run
computer tests on it. Finally, the power amps are
subjected to a thorough endurance test under the
harshest of conditions. This is our way of ensuring
that we catch even the most minor divergence from
our exacting quality control specifications and rectify
it before an amp leaves our facility. You get a tried
and true product that—like all HK Audio products—
meets the most exacting standards so that you can
focus on your performance instead of worrying about
your equipment.
2.2 Protective Functions
2.2.1 Short Circuit
The input and output jacks of the VX-Series power
amps are protected against all conceivable faults,
including defective cords and speaker systems (e.g.
with damaged circuit boards in the crossover). These
amps could even be operated with short-circuited
outputs without being damaged. Since, however, this
protective function places a heavy load on the output
stages, you should ensure you unplug defective
speakers or cords immediately. Under no
circumstance should you short-circuit the outputs
intentionally or for testing purposes.
2.2.2 Overheating
If a VX power amp overheats, the output signal
cancels out at irregular intervals and the Protect LED
lights up. But since the VX power amps were develo-
ped for problem-free performance under the worst
conditions and have undergone testing in extreme
environments, it is unlikely that this will occur under
normal circumstances. If your amp does overheat, be
sure to check if the power amp is getting proper
ventilation and whether the internal ventilation
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