you may encounter 16 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.
KXR amplifiers require 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 both 4 and 8 Ohms.
4 Ohm speaker
8 Ohm speaker
KXR150
75W RMS per channel
50W RMS per channel
KXR300
150W RMS per channel
100W RMS per channel
KXR600
300W RMS per channel
200W RMS per channel
KXR1000
500W RMS per channel
340W RMS per channel
KXR1500
750W RMS per channel
450W RMS per channel
KXR2000
1000W RMS per channel
670W RMS per channel
CONNECTING YOUR SPEAKERS TO YOUR AMPLIFIER…
•
Always ensure that both volume controls on your KXR amplifier are turned to zero and
that it’s mains power is switched off when making connections.
•
Using an appropriate cable (if in doubt refer to the ‘Connection types’ section below)
connect the left speaker to channel A and the right speaker to channel B.
•
Please read the rest of this manual before turning on the power or adjusting the volume
controls.
CONNECTION TYPES
Speakon
All KXR amplifiers feature a pair of Speakon speaker output sockets. Speakon is a standard connection
type that is only used for connecting speakers to amplifiers. You cannot use Speakon connections for any
other type of audio signal connection.
The Speakon connections on your KXR amplifier are internally wired with a st1/-1 configuration.
This means they are designed to be used with two pin Speakon cables. This wiring configuration matches
all Speakon equipped Kam speakers. If you wish to use your KXR amplifier with speakers which use a
+2/-2 configuration you may need to construct a special cable. You will find details on this and how to
construct a standard Speakon cable online at www.kam.co.uk/tuition.
Binding Posts
Although Speakon is a safer and more reliable form of speaker connection and we highly recommend using
Speakon if you can… for your convenience you will find that all models of KXR amplifier also feature
‘Binding Post’ speaker output connectors. Binding Posts are threaded terminals designed to accommodate
bare wires. For secure connection pass the bare cable end through the hole, wrap the cable around the
post and firmly screw down the cap. It is important to ensure that no stray bare cable ends connect the
two posts. One post is red and should be used for positive and the other is black and should be used for
negative connections.
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