Peavey Invective 120 Operating Manual page 7

(23) MSDI SECTION
The proprietary Peavey MSDI circuit provides a balanced microphone-simulated direct signal to outboard
recording gear and mixers. The "microphone" compensation very accurately reproduces the sound of whatever
cab you are using in conjunction with the Invective 120. The LEVEL control adjusts the output level of the XLR
jack, the TONE control adjusts the extreme high frequency response of the output to accommodate different
high frequency drivers in PA systems, and the GROUND LIFT switch is used to break hum-inducing ground
loops between the Invective 120 and outboard equipment.
(24) SPEAKER OUTPUTS
Paralleled ¼" mono (TS) jacks are provided for the connection of speaker enclosure(s). The Impedance switch
should be set to match the load of the speaker cabinet(s), as described above. Always use good quality speaker
cables (not shielded instrument cable) for these connections.
(25) IMPEDANCE SELECTOR
Three-position switch allows for 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. When using the amp
in HALF POWER mode, note that there is a 2:1 impedance difference which is also listed near the switch.
(26) OUTPUT POWER
This switch sets the maximum power level to either Full or Half, This literally shuts off two of the four power
output tubes.
(27) AC MAINS FUSE
This fuse is for the mains supply for the amp. The 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 DIS-
CONNECTED.
(28) 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 U.K. ONLY
If the colors of the wires in the mains lead of this unit do not correspond with the colored markings identi-
fying 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 colored red.
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