Knoll 4K User Guide

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).

1. 

 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. 

. 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. 

. Each channel

features an input gain adjustment pot to adjust each

channel for gain and speaker sensitivity variations.

4. 

. 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. 

. Optional rack mount

version fits in a standard 19" EIA rack.

6. 

 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. 

.  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.

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.

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.