Knoll 4K Manuel D’Utilisation

Warranty 

 

Knoll Systems warrants MA1250 amplifiers sold in the USA and Canada by 
authorized Knoll dealers to be free of defects in materials and workmanship. This 
warranty extends for three full years from the date of purchase by the original 
consumer. Any products returned to Knoll Systems and found to be defective by 
Knoll Systems within the warranty period will be repaired or replaced at Knoll 
Systems decision, at no charge. Knoll Systems will not be responsible for the 
actual cost of installation or removal of the product, nor for any incidental or 
consequential damages. Some states do not allow the exclusion or limitation of 
incidental or consequential damages, so the above limitation may not apply to 
you. This warranty gives you specific legal rights. You may have additional legal 
rights that vary from state to state. 

Warning: To be installed and/or used in accordance with appropriate 
electrical codes and regulations. 

 

Description: The 4K and 6K are members of the long line of Knoll 
multi-channel amplifiers. Designed primarily for the custom install 

industry, they are used to power speakers with different or similar 

sources in multiple rooms. With 8 or 12 channels rated at 50 watts per 

channels at 8 ohms, these amplifiers pack some serious punch. Each 
channel has a gain control. The amplifier can be turned on and off via 

the front panel power switch or via the 12 VDC trigger. 4K channels 3-8 

can be linked to channel 1-2 individually using the link switches. 6K 
channels 3-12 can be linked to channel 1-2 individually using the link 

switches. 4K and 6K amplifiers designed to meet the amplifier needs of 

custom installed systems where high-quality sound is a specific 
requirement. 

 

Specifications: 4K (eight channel)/6K (twelve channel) 

Inputs 

8/12 Gold RCA jacks with adjustable gain 

Input impedance 

50k ohms 

Outputs 

Gold 5 way binding posts 

Output power 

50 watts RMS per channel (8 ohms) 

Peak output power 

100 watts per channel (8 ohms) 

Ideal impedance 

4 - 8 ohms 

Frequency response 

10 Hz - 40 kHz +/- 1dB (1w) 

S/N ratio 

over 105 dB A weighted (50 watts) 

THD distortion 

less than 0.1% 20 Hz to 20 kHz 

IMD distortion 

less than 0.01% 60 Hz 7 kHz 4:1 (SMPTE) 

Trigger control 

12 VDC 35mA on 3.5mm mono jack 

Dimensions 

17" x 3.5" x 11.5" (432 x 89 x 292mm) 

Fan Noise 

quiet 26 dBA 

Power 

550/750 watts at 117 VAC or 230 VAC 

Weight 

21 lbs (9.5 kg) 

 

Key Features: 
1. Size efficiency. The 4K has eight power amplifiers and the 
6K has twelve power amplifiers each in one 3-1/2” high 
enclosure. Each power amplifier channel can deliver 50 watts 

RMS into an 8-ohm load.  
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 rear chassis input gain adjustment pot to adjust each channel 
for gain and speaker sensitivity variations. 

Note: Specifications subject to change without notice. 

4. External power on/off. The 4K and 6K can be turned off 
and on by external controllers using the 12 VDC trigger jack.  

5. Stackable 17" chassis with 19” EIA rack version option. 

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 2-6 to channel 1 

(l/r) on model 6K. With 4K link channels 2-4 to channel 1 (l/r). 

145 Tyee Drive Point Roberts, WA 98281 

12140 Horseshoe Way, Richmond, BC V7A 4V5 

Tel: (604) 272 4555, fax (604) 272 5595 

 

 

Made in Canada