K-ARRAY KMT18 [11/28] Amplifier

REV. A

KMT12/KMT18

8. AMPLIFIER

8.1 AC POWER CONNECTOR

8.2 VOLTAGE REQUIREMENT

8.3 CURRENT REQUIREMENT

The amplier 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 KMT12 and KMT18’s switching power supply accommodates AC mains operating at either

115V or 230V. The KMT ampliers will continue to operate safely, without interruption, provided the

AC voltage remains within 90 - 135V or 190 - 250V (230V), 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 250V. Doing so will

cause signicant damage to the device and create serious risk for users!

The KMT12 and KMT18 present a dynamic load to the AC mains, drawing additional current as operating

levels increase. 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 specications. 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.