VOX Amplification USA VTX150 - Manual (Page 12)

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3. FX LOOP (Effect loop) jacks
These are loop jacks for connecting an external effects processor.
Connect the SEND jack to the input of your external effects processor. Connect
the RETURN jack to the OUTPUT of your external effects processor.
4. VOX BUS port
Connect the optional (separately sold) foot controller here.
For details on using the foot controller, please refer to “Using a foot controller
(VC-12SV)” (p.20).
NOTE: Never connect anything to this port other than the VC-12SV.
5. FOOT SW (foot switch) jack
You can connect an optional VOX VFS5 foot switch here.
For more information on using the VOX VFS5, please refer to “Using the foot
switch (VOX VFS5)” (p. 19).
NOTE: You must connect or disconnect the VFS5 while the power is off.
Malfunctions or damage may occur if you connect or disconnect the foot
switch while the power is on.
NOTE: Take care that you don’t mistakenly connect the VFS5 to the
EXTENSION SP jack.
6. EXTENSION SP (Extension speaker out) jack
You can connect a guitar speaker cabinet here.
If a protective cap that guards against accidental insertion is attached, remove
it first.
IMPORTANT: In order to ensure correct operation, you must strictly
observe the following points.
a) Use only an 8 ohm external speaker; no other impedance may be
used.
b) Do not connect a speaker whose rated input is less than 150 watts.
Doing so may damage your speaker.
c) You must use a speaker cable to connect the speaker. Don’t use a
shielded cable of the type used to connect a guitar to an amp.
d) You must turn off the power before connecting this cable. The amp
may malfunction if you connect or disconnect this cable while the
power is on.