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Return Level; Mains Input - U-sound OP 50 Instruction Manual

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Rear Panel Control.
!

RETURN LEVEL

SEND
- This is where you plug the INPUT of your Effect(s).
RETURN
- This is where you plug the OUT of your Effect(s).
FX LOOP
- Effects loop toggle switch.
Note.
The
SEND / RETURN
When the FX LOOP switch is turned on, the
general volume control.
MASTER
-
Post Phase Inverter Master Volume
of the power amp.
Allows you to reduce the overall power of the ampli er, practically without changing the sound
structure. A very useful feature for home use.
IMPEDANCE
- Select between 16, 8 or 4 Ohm to match your speaker set-up.
SPEAKERS
- Plug speaker cabinets here. Set Impedance selector to appropriate position.
FUSE HT
- Only replace with Type indicated on rear panel. If this fuse blows, it's most
likely a bad power tube.
Note.
If the sound fails, it is possible that this particular fuse has blown. In this case replace it with the same one
(1 amp, 250 volts). In no case, not a higher denomination!
If it burns out again immediately after replacement, turn off your ampli er completely and
contact me for advice and possible repair.

MAINS INPUT

- Mains socket 220 volts. At the bottom of the connector is a 2 amp 250 volt
- Adjusts the signal level from the output of the effects processor.
Works with the included
board is very useful even without connecting an effects processor (effects chane).
RETURN LEVEL
mains fuse.
Do not use fuses with a larger value, in order to avoid serious damage!
QU
FX LOOP
toggle switch.
knob can be used as an additional
. Adjusting the volume before the output tubes
-4-
FUSE

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