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Lambda Labs - Professional Acoustics
The symmetrical audio inputs have 10kOhm impedance, when the channel Input Signal Attenuator (Input Level Knob) is at its
minimum position (counter-clockwise). The input impedance with the attenuator at its maximum position (clockwise) is
20kOhms.
Usual drive capacity of DSP units on the market is 600 Ohms. Daisy chaining more inputs (and/or more KW-18 units) is
limited therefore to 16 inputs altogether (625 Ohms) with the input signal attenuators at their minimum positions. With all
attenuators at their maximum position, the number of inputs driven in parallel (daisy chained) could be as high as 32!Voltage
gain of the KW-18 power amplifier is 30dB with the Input Signal Attenuator at its maximum position.
Danger: Always design your grounding scheme before connecting input signal to the unit! Ground loop
could damage the equipment! As a rule of thumb, in problematic cases one should remove the shield of
the signal cable only on the receiver unit's side! Do never defeat the safety purpose grounding pin of
[
DANGER!
the power plug!
Caution: XLR audio shield pins are directly connected to the housing of the unit and to the power input
PE pins!
[
CAUTION!
6. Front Panel Detailed Description
6.1. Introducing User Interface
6.1 Figure 1: User Interface Overview
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KW-18 Amplifier Manual
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