Rear Panel Functions
A/C Input - Connects the amplifier to A/C power via the power cord supplied. Unless otherwise
specified, your amplifier is designed to operate on 120 volts A/C, 60 cycles.
Fuse- See Fuse Chart
Power Switch- Turns power on.
Speaker Output Jacks- There are 3 speaker output jacks; 4, 8, and 16 ohms.
NEVER OPERATE YOUR AMPLIFIER WITHOUT A PROPER SPEAKER LOAD CONNECTED.
Be sure to match the impedance of your cabinet with the impedance (output) of the amplifier.
Effects Loop –
The effects loop on this amplifier is a “half active” type of loop, see FAQ on two-rock.com
RETURN LEVEL + Push/Pull BRIGHT – Adjusts the effects loop return level. The loop is active in
the circuit even with no effects connected, so the level control also can be used as a additional
master volume control. This function can be useful but also a bit confusing so as appoint of
reference, set this control at 11:00 for unity gain when not using the effects loop. The pull-bright
feature is useful when playing at a lower volume, or when connecting more than a few pedals into
the loop, which sometimes causes high frequency insertion loss.
SEND - Use this jack to send the amplifier’s signal to the effects that you want to use in the loop.
RETURN - Use this jack to connect the output from the effects in the loop back to the amplifier.
Pickup Loading- Loading the guitar pickup(s) to varying degrees changes the impedance
relationship between the pickup and the amplifier’s first gain stage. Loading reduces inductive
“ringing” in the pickup coils. The result is a more controlled high frequency response and a
reduction in high frequency artifacts produced when a pickup’s magnets and coils feedback with
each other, usually at or near the pickup’s saturation point. The damping effect will also reduce the
gain, which is normal. Tonally speaking, reducing these artifacts results in a cleaner waveform and
an apparent lack of harshness in the upper frequencies. This control has 5 settings. In the first
position (fully counterclockwise), there is no additional pickup loading, with 4 additional settings
available. Fully clockwise (last position) is full loading.
S/N - Your serial number is located here. We strongly suggest that you record this number and
have it handy in case you need service, or in the event that your amp is lost, stolen, or damaged.
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