K-array Redline KMT21, User Manual

KMT21

REV. A

10

8. AMPLIFIER

8.1  AC POWER CONNECTOR

8.2 VOLTAGE REQUIREMENT

8.3 CURRENT REQUIREMENT

The amplifier module and any audio equipment connected to it (mixing consoles, processors, etc.) must be 
properly connected to the AC power distribution, preserving AC line polarity.  All grounding points should be 
connected to a single node or common point, using the same cable gauge as the neutral and line cables. Bad 
grounding connections within an audio system can produce noise, hum and/or serious damage to the input/
output stages in the system’s electronic equipment.

Before applying AC to any K-array self-powered speaker, be sure that the voltage 
potential difference between neutral and earth ground is less than 5 VAC.

The KMT21 will operate safely, without interruption, provided the AC voltage remains within 85V- 268V, at 
50 or 60 Hz.  Please verify that your AC mains connection is capable of satisfying the power ratings for the 
device.

CAUTION

Do not connect the system to AC power mains exceeding 270V. Doing so will 

cause significant damage to the device and create serious risk for users!

The KMT21 presents a dynamic load to the AC mains, drawing additional current as operating levels incre-
ase. Different cables and circuit breakers heat up at varying rates, so it is essential to understand current 
ratings  and  how  they  correspond  to  circuit  breaker  and  cable  specifications.  Maximum  continuous  RMS 
current - measured over a period of at least ten seconds - is used to calculate the temperature increase in 
cables, which drives the proper size and gauge cable and rating for slow-reacting thermal breakers.  Maxi-
mum burst RMS current - measured over a period of approximately one second - is used to select the rating 
for fast reacting magnetic breakers. 

For best performance, voltage drops should not exceed 10% at 115V or 5% at 230V.