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 qualified electrician to install any electrical equipment. To prevent the risk of shock or fire
hazard, always be sure the amplifier 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.
FUSE HOLDER
This is the main fuse for the amplifier. If this fuse blows, unplug the amplifier and switch the POWER and
STANDBY switches off before attempting to replace it. Use only the fuse specified. Care should be taken
when replacing this fuse, as it could be a sign something is seriously wrong with the amplifier.
SPEAkER OUTPUT JACkS
These are the main outputs of the power amplifier. 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.
IMPEDANCE SELECTOR SwITCH
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 configured 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 specification. 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.
REMOTE SwITCH JACk
Seven-pin DIN input for channel switching, compression, graphic EQ and mute with included footswitch.
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