Cabinet Impedance Switch; Speaker Outputs; Line Out Level; Line Out - Peavey 3120 Operating Manual

(23)

CABINET IMPEDANCE SWITCH

This three-position switch allows appropriate selection of speaker cabinet impedance.
If two enclosures of equal impedance are used, the switch should be set to half the
individual value. For example, two 16-Ohm enclosures necessitate an 8-Ohm setting,
while two 8-Ohm enclosures would require a 4-Ohm setting. Minimum speaker impedance
is 4 Ohms.
(24)

SPEAKER OUTPUTS

These paralleled 1/4" mono (TS) jacks are provided for the connection of speaker
enclosure(s). Again, minimum speaker impedance is 4 Ohms. The CABINET IMPEDANCE
SWITCH (23) should be set to match the load of the speaker cabinet(s).
(25)

LINE OUT LEVEL

This control sets the level of signal being sent out of the LINE OUT (26) jack. It may be
used to balance the level of slave power amp/speaker systems driven from the LINE
OUT (26) to the level of cabinets driven from the SPEAKER OUTPUTS (24).
(26)

LINE OUT

This 1/4" mono (TS) jack provides a pre-power amp signal to drive another power amp/
speaker system while maintaining the amplifier's tone.
(27) FUSE
A fuse is located within the cap of the fuse holder. This fuse must be replaced with one
of the same type and value to avoid damaging the amplifier and voiding the warranty. If
the amp repeatedly blows the fuse, it should be taken to a qualified service center for
repair.
WARNING: THE FUSE SHOULD ONLY BE REPLACED AFTER THE POWER CORD HAS BEEN
DISCONNECTED.
(28) GROUND POLARITY SWITCH
This three-position, rocker-type switch should normally be placed in the center (0)
position. If hum or noise is noticed coming from the speaker enclosure(s), the switch
may be placed in the "+" or "-" position to minimize hum/noise. If changing the polarity
does not alleviate the problem, consult your authorized Peavey dealer, the Peavey
factory, or a qualified service technician.
(29) IEC MAINS CONNECTOR
This is a standard IEC power connector. An AC mains cord having the appropriate AC
plug and ratings for the intended operating voltage is included in the carton. The
mains cord should be connected to the amplifier before connecting to a suitable AC
outlet.
U.S DOMESTIC AC MAINS CORD
The mains cord supplied with the unit is a heavy-duty, 3-conductor type with a
conventional 120 VAC plug with ground pin. If the outlet used does not have a ground
pin, a suitable grounding adapter should be used, and the third wire should be
grounded properly.
Never break off the ground pin on any equipment. It is provided for your safety.
NOTE: FOR UK ONLY
If the colors of the wires in the mains lead of this unit do not correspond with the col-
ored markings identifying 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 colored 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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