Vox BRIAN MAY SPECIAL VBM1 - Manual (Page 9)

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7. RECORDING/HEADPHONE jack
This speaker-emulated jack enables you to connect directly to a mixing console
or portable recorder such as a Korg PXR4 or D1600. Additionally, you can hook-
up headphones to this jack for a great emulated sound. Turning the VOLUME
controls (6) to zero will facilitate “silent” practicing.
8. EXTENSION SPEAKER jack
This jack allows you to connect an external speaker cabinet for added tonal
possibilities. Be sure to use a speaker cable (unshielded) when doing this and
that you’re using a cabinet that has an impedance not less than 8 Ohms and a
Wattage rating of 10 Watts or more.
IMPORTANT NOTE: Connecting an extension speaker here mutes the internal
speaker.
For optimum performance we strongly recommend the following:
a) ONLY use an extension cabinet of 8 Ohms impedance or more with this
amplifier NOTE:– using speakers with impedances of less than 8 Ohms
can damage the amplifier!
b) DO NOT use a speaker cabinet with a Wattage rating that is less than 10
Watts. If you ignore this warning, you could end up blowing a speaker —
and that’s definitely not recommended!
c) ALWAYS use a high quality speaker cable (unshielded) to connect an
external cabinet — NEVER use a guitar (shielded) cable
d) You must turn off the power before you connect the cable. The amp may
be damaged if you connect or disconnect the cable while the power is on.
9. POWER switch
This is where you turn on the power. Please be sure that all connections are
made prior to turning this unit on.
VERY IMPORTANT NOTE: Always make sure you turn on the Brian May Special
before connecting the BOOSTER OUTPUT to another amplifier to avoid doing any
damage to the front end of the amp you are connecting to.