Operation Manual

Never break off the grounding pin on any equipment. It is provided for your safety. The use of extension

cords should be avoided, but if necessary always use a three-wire type with at least #4 AWG wire size.

Always use a qualied electrician to install any electrical equipment. To prevent the risk of shock or re

hazard, always be sure the amplier and all associated equipment is properly grounded.

NOTE: For UK Only

If the colors of the wires in the mains lead of this unit do not correspond with the colored markings iden-

tifying the terminals in your plug, proceed as follows: (1) The wire that is colored green and yellow must

be connected to the terminal that is marked by the letter E, the Earth symbol, colored green or green and

yellow. (2) The wire that is colored blue must be connected to the terminal that is marked with the letter

N or the color black. (3) The wire that is colored brown must be connected to the terminal that is marked

with the letter L or the color red.

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This is the main fuse for the amplier. If this fuse blows, unplug the amplier and switch the POWER and

STANDBY switches off before attempting to replace it. Use only the fuse specied. Care should be taken

when replacing this fuse, as it could be a sign something is seriously wrong with the amplier.

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These are the main outputs of the power amplier. These are combination jacks that will accept either

Neutrik® Speakon® connectors OR standard 1/4" inch jacks. Both outputs are in PARALLEL. External

wiring connected to the output jacks should be made by an instructed person or use UL approved, ready-

made leads or cords.

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The IMPEDANCE SELECTOR switch is located on the rear of the unit. There are output transformer taps for

2, 4 and 8 ohm loads since these are the most common impedance requirements for bass cabinets. Using

the correct setting is important to ensure longer tube life and maximum performance. It is best if this

switch is congured while the amp is in standby mode. Simply move the selector to the correct impedance

setting.

Tip: If you are unsure about the impedance of your speaker enclosures, just look on the back of your en-

closures. Usually, you will see a 4 ohm or 8 ohm specication. Combining cabinets will change the imped-

ance. If you use two 8 ohm cabinets at the same time (in parallel) you should use the 4 ohm setting, and

if you use two 4 ohm cabinets at the same time (in parallel) you should use the 2 ohm setting.

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Seven-pin DIN input for channel switching, compression, graphic EQ and mute with included footswitch.