Operating instructions

OPERATING INSTRUCTIONS MONO POWER AMP 250W/500W

1. IEC Socket and Fuse Holder This is the socket for plug in the line cord. The fuse tray contains the main fuse of the

Power Amp. Replace the fuse only with the same type and size.

2. Voltage Selector Switch This switch is set at the factory to the correct voltage for your country. It can easily be changed to

230V or 115V by switching to the correct position FUSE values are T4AL for 230V and T8AL for 115V (T5AL/T10AL by the

Mono Power 500W). Note when the wrong voltage value is set, there is a serious risk of damage to the unit if this is

done incorrectly.

3. Ground/Lift Switch This switch is included to remove hum and buzz when connecting to equipment powered by a different

ground system.

4. Output Impedance Selector (2, 4 or 8

Ω) This adjusts the correct impedance depending on the impedance of the used

speaker system. Before engaging the Power Amp be sure that the correct impedance is adjusted to obtain the maximum

rated power. Never connect speaker cabinets with lower load as in the selected position is labelled on the amplifier. This will

result in over heating of the amplifier and shutting down into protection mode.

5. Speaker Output The Mono Power Amplifier Series feature ¼” and lockable coaxial speaker sockets. To avoid damages

connect speaker cabinets before main power is applied to the unit. When connecting speaker cabinets we recommend to

use the lockable coaxial speaker socked preference to the ¼” jack as it provides a far superior connection. ¼” jacks have

been added for a user-friendly handling when it is absolutely necessary to use them (for example by old cabinets without

lockable speaker connection). Before turning on the amplifier make sure that the speakers are connected and the

impedance switch is set to the correct position.

6. Input ¼” jack audio input for connecting instrument Preamp.