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OVERVIEW
Your KXPro Amplifier is a high quality, high power professional PA amplifier with a wealth of
features usually restricted to products with much higher price tags. It features built in adjustable
Crossovers to facilitate use in complex audio systems and a robust design that makes realistic use
of the dedicated Bridge mode connection a sensible proposition. We know you're itching to get it
fired up but bear with us and we'll run through a few things you should know that will help you get
the best from your new amplifier and ensure that it lasts as long as you want it to.
There are three models in the KXPro Amplifier range
KXPro1000
2 x 500W RMS amplifier
KXPro1600
2 x 800W RMS amplifier
KXPro2400
2 x 1200W RMS amplifier
SAFETY NOTE
ALWAYS turn off the mains power before making any connections to KX Pro amplifiers. Large PA
amplifiers are capable of sending potentially lethal amounts of electricity to their outputs so you
should always ensure that any amplifier has its power turned off (and preferably disconnected)
before making connections. NEVER attempt to connect a microphone to the speaker outputs
of an amplifier.
WHICH SPEAKERS ARE RIGHT FOR YOUR AMPLIFIER?
Power & Impedance
It is important to ensure that you match the power that your speakers can handle with the power
that your amplifier can produce. A set of speakers has two stated ratings.
They should have a 'Power' handling capacity that is measured in Watts (EG 300W). This tells
you how much power the speaker can handle from the amplifier before the sound distorts and
damage begins to occur. This is often stated as two different ratings; 'RMS' which means how
much power can be handled constantly... and 'Peak' which as the name suggests means an
amount of power it can handle for a short period of time.
A speaker will also have what we call an 'Impedance' rating. Impedance is a term we use to
define the amount of resistance your speaker presents to your amplifier and it is measured in
'Ohms'. Most speakers have an Impedance rating of 8 Ohms but ratings of 4 Ohms are not
uncommon and sometimes you may encounter 16 Ohm or even 2 Ohm. A speaker that is rated
at 8 Ohm presents a larger amount of resistance to the amplifier than one that is rated at 4
Ohm. As you can see from the chart below this means that a particular amplifier will deliver
greater power to a pair of 4 Ohm speakers than it would to a pair of 8 Ohm speakers.
NOTE: Connecting multiple speakers to a single amplifier alters the impedance rating of the
speakers. For guidance on this visit www.kam.co.uk/tuition.
KXPro 1000 and 1600 amplifiers require speakers with a minimum Impedance rating of 2 Ohm.
KXPro 2400 requires speakers with a minimum Impedance rating of 4 Ohm. They will work just
as well with speakers rated at 8 Ohm but the volume achieved from your speakers will be
different for 4 and 8 Ohm speakers. The chart below tells you the power output ratings for
KXR amplifiers at 2, 4 and 8 Ohms.
2 Ohm
KXPro1000
650W per channel
KXPro1600
1000W per channel
KXPro2400
n/a
KXPro1000 Bridged
n/a
KXPro1600 Bridged
n/a
KXPro2400 Bridged
n/a
FRONT PANEL CONTROLS
[1] Mains Power switch - use this to switch the mains power on/off.
[2] Power LED - when the power is on the blue power LED will light.
[3] Volume controls - used to adjust overall volume for each channel.
[4] Channel Level Meters - each channel has a 12 point LED Level meter. AnoPtimum signal level
should cause these level meters to peak at between -6dB and 0dB.If the red 'Peak' indicator LED
lights, signal levels are excessive and you should reduce the volume.
[5] Stereo LED - this green LED illuminates when the KXPro is operating in standard stereo mode
(IE the Bridge Mode switch [11] is set to STEreo.
[6] Bridge LED - this green LED illuminates when the KXPro is operating in Bridge Mode(IE the
Bridge Mode switch [11] is set to BRidge.
4
4 Ohm speaker
8 Ohm speaker
500W RMS per channel
300W RMS per channel
800W RMS per channel
500W RMS per channel
1200W RMS per channel
750W RMS per channel
1200W RMS
950W RMS
2000W RMS
1400W RMS
n/a
2400W RMS
5
2
6
3
1
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