6
Ⅴ
Connecting Your System
A. MOUNTING
The VP240D/VP120D
is designed for standard 19″rack mounting.
In addition, the amplifier provid
es
sturdy no-skid rubber feet for
secure table top or stacked operation. When rack mounting one or more amplifiers, or when mounting in combination with other
equipment, be sure to allow adequate front and rear ventilation to avoid possible heat related damage to your VP240D/VP120D
or other rack mounted items.
B. OPERATING PRECAUTIONS
Your STK VP240D/VP120D P.A amplifier is well protected from any external faults.
However, we recommend following these common-sense precautions:
1. Safety Instructions
Read and follow all of the safety warnings on page 3 of this manual and on the separate safety precautions
page enclosed with the unit. Do not expose the VP240D/VP120D to water or other liquids.
Always unplug the unit if water is present. Failure to do so can result in injury or death from electric shock.
2. Grounding
If your power amplifier is supplied with a three conductor, grounded power cord and plug, connect the unit
only to a properly grounded mains outlet. Do not use a ground lift adapter or otherwise attempt to defeat
the ground on the plug. Failure to properly ground the unit can result in damage to the amplifier or other
equipment connected to it and represents a dangerous safety hazard.
3. Line Voltage
Operate from AC mains not more than 5% above or below the specified line voltage. Failure to comply may
invalidate your warranty.
4. Pre-Connection Caution
Always switch off the power and set all the level controls to minimum before making any connections.
This will eliminate any chance of unexpected, loud audio transients that could damage your speaker systems.
C. VP240D/VP120D OPERATION
1. Input Connections
With the power off, connect your input source lines to XLR input jack on the VP240D/VP120D
2. Connect Speaker Systems
Connect speaker systems to speaker outputs as shown figure for low and high impedance output.
The total speaker load for each terminal must be at least minimum impedance value.
3. Level Controls
With all level controls set to 0, switch the power on. Apply a nominal signal to inputs. The level of the
input signal should be about as high as you will ever need it to be. This way, it will be as far above the
amplifier's noise floor as possible, ensuring as excellent performance signal to noise ratio. Adjust the input
level controls to achieve the desired maximum listening level or until the 0dB LED flashes
momentarily during program peaks, whichever is lowest. Having set the levels in this manner will render
a clean signal at any level as long as the 0dB LED are not constantly on. Remember, when the 0dB LED constantly
lights, there is coming soon for distortion present in the amplifier's output section.
