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Congratulations and thank you for choosing a Knöll power
amplifier. The 4K and 6K are very similar. The 4K includes
four stereo amplifiers each rated at 50 watts per channel
(8 ohms). The 6K includes six stereo amplifiers each rated
at 50 watts per channel (8 ohms).
Key Features:
1.
Legendary reliability.
The 4K and 6K include
electronic circuits and designs to effortlessly amplify for
years. Knöll is well known in the multi-channel amplifier
industry as the reliability leader.
2.
Automatic protection circuitry
. Each amplifier
channel is individually and fully protected against low
impedance, overheating, overloading, overvoltage and
undervoltage. The protection circuitry automatically
restores the amplifier channel as soon as its parameter
returns to the safe operating area.
3.
Individual input gain adjustment
. Each channel
features an input gain adjustment pot to adjust each
channel for gain and speaker sensitivity variations.
4.
External power on/off
. The amplifier can be
turned off and on by external controllers. To activate
external power on, apply a 12VDC current to the trigger
jack (the amplifier power switch is in the off position for
external power control).
5.
Stackable 17" chassis
. Optional rack mount
version fits in a standard 19" EIA rack.
6.
Link Feature.
Certain installations require that some
or all of the stereo channels play the same content.
Instead of using Y cords, "link" cascades any or all of
channels 2-4 (4K) 2-6 (6K) to channel 1 (l/r).
7.
Cooling fan
. The 4K and 6K feature a
thermostatically controlled internal fan to help to avoid
early protection system distortion as well as reduce noise
and energy consumption.
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Troubleshooting
If a problem is encountered with the 4K or 6K amplifier, the
most expedient procedure is to locate the problem and if
possible repair it before requesting service. Be sure to
carefully check other system components such as
controllers, CD players, volume controls, wiring, speakers,
etc. that may be at fault.
Problem
Action
Power led does
1. Check that the 4K or 6K is plugged in.
not light - no sound 2. Test the AC outlet with a lamp.
3. If remote on/off is used, check that
the trigger voltage is at 12 VDC.
4. Check 4K or 6K power button on (in).
Sound cuts out
1. Verify speaker impedance is 4-16 ohms.
Changing speakers may be required.
2. Check if the amp feels hot. If it's
hot increase cooling - see Installation.
Sound is distorted
1. Turn the volume down
2. Check speakers for damage.
3. Check inputs for proper levels.
4K or 6K gain and source output level
may have to be adjusted.
4. Speakers may be less than 4 ohms.
4K or 6K does not
1. Turn 4K or 6K power switch off (out)
turn off
2. If trigger is being used, power switch
needs to be set to off (out) position
or amp is on all the time.
3. Try disconnecting trigger jack..
Trigger does not
1. Measure trigger voltage with a volt
work
meter. It needs to be 11-15 volts DC
to work (current is 35mA per
4K or 6K). See page 6 #10.
Speaker pops when 1. Speaker may need resistor placed
amp turned on or off across terminal. Suggest 2k0 1/4 w.
Discharges speaker internal cap.
