KAM KXR Pro amplifier series User manual

KXR Pro amplifier series
High power professional power amplifiers
Due to continuous product development, please ensure that you have downloaded
the latest instruction manual for this product from the Kam website at www.kam.co.uk
MANUAL VERSION 1.0
01-06-14
For the latest instruction manual updates and information on the entire Kam range visit:
www.kam.co.uk
Kam products are manufactured by: Lamba plc, Unit 1, Southfields Road, Dunstable, Bedfordshire, United Kingdom LU6 3EJ
Telephone: (+44) (0)1582 690600 • Fax: (+44) (0)1582 690400 • Email: [email protected] • Web: www.lambaplc.com
Made in China. Due to continuous product development, specifications and appearance are subject to change. © Copyright Lamba plc. E&OE.

Thank you for purchasing this Kam product, we are sure that it will serve you for many years to come.
To optimise the performance of this product, please read these operating instructions carefully to familiarise yourself with the basic
operations of this unit. Please retain them for future reference. This unit has been tested at the factory before being shipped to you.
To prevent or reduce the risk of electrical shock or fire, do not expose the unit to rain or moisture. To prevent a fire hazard, do not
expose the unit to any naked flame sources. Unplug this apparatus during lightning storms or if it is unlikely to be used for long
periods of time. When installing the unit, please ensure you leave enough space around the unit for ventilation. Slots and openings in
the unit are provided for ventilation to ensure reliable operation of the product and to protect it from overheating. To prevent fire
hazard, the openings should never be blocked or covered.
The unit is powered by mains electricity, always handle the power cable by the plug. Never pull out the plug by pulling on the cable.
Never touch the power cable when your hands are wet as this could cause an electric shock. Do not tie a knot in the cable. The
power cable should be placed such that it is not likely to be stepped on. A damaged power cable can cause a fire or give you an
electrical shock. Check the power cord periodicaly, if you ever find that it is damaged, replace it before using the unit again. Contact
your retailer for a replacement.
The voltage of the available power supply differs according to country or region. Be sure that the power supply voltage of the area
where this unit is to be used meets the required written on the unit.
The lightning flash symbol inside a triangle is to alert the user to the presence high voltage within the unit’s enclosure that
may be of sufficient power to constitute a risk of electrical shock to persons. Caution: to prevent the risk of electric shock,
do not attempt to open the unit. No user-serviceable parts inside. Refer all servicing to qualified service personnel. The
exclamation mark inside a triangle is intended to alert the user to the presence of important operating and maintenance
instructions in the literature accompanying the appliance.
Select the installation location of your unit carefully. Avoid placing it in direct sunlight or locations subject to vibration and excessive
dust. Do not use the unit where there are extremes in temperature (below 41ºF / 5ºC or exceeding 95ºF / 35ºC).
Unpacking and safety Please unpack your new product carefully. Your new product should reach you in perfect condition. Please
check that no damage has occurred during transit. If any damage is found, do not operate your unit. Please contact the retailer you
purchased it from immediately. If there is any damage to the mains cable do not use the device. Always disconnect the unit from the
mains supply when carrying out any cleaning of the unit.
Manufacturer declarations
In compliance with the following requirements: RoHS Directive (2002/95/EU) and WEEE Directive (2002/96/EU).
If this product is ever no longer functional please take it to a recycling plant for environmentally friendly disposal.
CE declaration of conformity
R&TTE Directive (1999/5/EU), EMC Directive (2004/108/EU), Low Voltage Directive (2006/95/EU).
The declarations are available on application from certificat[email protected]
Before putting the devices into operation, please observe the respective country-specific regulations.
Connections Connect the output of a pre-amplifier or mixer to the audio inputs. The input signal should be of line level. The
maximum output power is obtained when connecting 4 Ohm speakers. It is also possible to connect 8 Ohm speakers; however, the
output power will decrease in this case. The speakers must always have a power rating higher than the output of the amplifier.
Connect the output of the amplifier to suitable speakers via either the left and right audio output connectors. The majority of PA
speakers available are 8 Ohms. By connecting two 8 Ohm speakers together, their rating becomes 4 Ohms, therefore, if you attach
two connected speakers to each channel, you will achieve the maximum power output of the amp. Do not connect two 4 Ohm
speakers to each channel as this will reduce the load to 2 Ohms which is not recommended for this type of amplifier.
Switching On/Off In order to a avoid loud switching noise, always switch on ALL other units in an amplifier system BEFORE
switching on the power amplifier, and switch it off FIRST after operation. Before switching the unit on or off, always turn the volume
dials to their minimum settings.
Level adjustment Set the output of the mixer or pre-amplifier to its rated level (0dB) or to the highest undistorted output signal. Turn
up the controls so far until the maximum desired volume is reached. If the red CLIP LED illuminates (showing an overload of the
amplifier), reduce the channel gain.

Protective circuit The protective circuit is provided to prevent damage to the speakers and the amplifier. If it is activated, the
PROTECT LED will light up:
1. Approximately one second after switching on (soft start).
2. If the amplifier is overheated, or if a short circuit has occurred at a speaker output, the CLIP LED of the corresponding channel
lights up. If this is the case or if the PROTECT LED lights up during the operation or if it is not extinguished after switching on, the
amplifier must be switched off and the cause for the defect needs to be eliminated.
Front and rear panels (rear panel dependent on model purchased)
Controls and connections
1. Power switch
2. Channel volume controls
3. Channel Clip LED indicators
4. Channel A/B Protect LED indicator
5. Power Indicator LED
6. Link/Thru connections (if applicable)
7. Audio inputs
8. AC mains input (Important – only ever use the main cable supplied with your unit)
9. Audio outputs
10. Output mode button (see below)
11. Voltage selector (if applicable)
Output modes Each Kam KXR Pro power amplifier has different output modes.
Stereo mode sends the signal from each channel to the corresponding audio output (e.g. channel A input > channel A output).
Bridge mode sends both A and B channels to a single audio output, thus doubling the output voltage of the amplifier. Ensure that
the speaker connected to the bridge output of the amplifier is able to handle this increased voltage and is the correct impedance.
Parallel mode (if applicable) creates a mono signal which doubles the output current of the amplifier which increases the output
impedance. As above ensure that the speaker connected to the bridge output of the amplifier is able to handle this increased voltage
and is the correct impedance.
The Kam KXR Pro2000 is able to switch between Stereo mode and Bridge mode.
The Kam KXR Pro4000 is able to switch between Stereo, Bridge and Parallel modes.
IMPORTANT due to the high power output of the Kam KXR Pro amplifiers, the mains cable supplied is of a heavier guage than
standard IEC cables. Only use the cable supplied or one of the same specification. Failure to do so may result in permanent
damage to the amplifier.

Technical specifications
_________________________________________________________
Kam KXR Pro2000
Amplifier power output 2000w @ 4 Ohms max power
Stereo power output 2 x 500w @ 4 Ohms RMS
Input connections Combi jack (XLR + 6.35mm jack) / RCA phono
Link/Thru connections XLR
Output connections Speakeron / binding post
Minimum impedance 4 Ohms
Frequency response 10Hz - 50KHz (+/-1.5dB)
S/N ratio 90dB
THD 0.05%
Dimensions 483 x 88 x 350mm
Weight 16.5Kg
_________________________________________________________
Kam KXR Pro4000
Amplifier power output 4000w @ 4 Ohms max power
Stereo power output: 2 x 1000w @ 4 Ohms RMS
Input connections Combi jack (XLR + 6.35mm jack)
Link/Thru connections XLR
Output connections Speakeron / binding post
Minimum impedance 4 Ohms
Frequency response 20Hz - 20KHz (+/-1.5dB)
S/N ratio 95dB
THD 0.05%
Dimensions 483 x 88 x 410mm
Weight 19Kg