FEATURES
BACK PANEL
SPEAKER OUTPUT : Connects the amplifier to your
cabinet. This Speakon combo jack allows for either
Speakon or ¼” speaker cable operation.
WARNING: Do not use an instrument cable with this
jack. Using an instrument cable can damage your
amplifier.
MIN - LOAD : Press when using a 2
Ω
load. You can
use this control to lower the output if your 4
Ω
cabinet is not able to handle more than 500W (you
can also get 350W with an 8
Ω
cabinet in this
configuration).
PRE AMP OUT : This output connects the preamp to
a different power amp.
POWER AMP IN : Use this input to connect a
different preamp to the power amp. (master volume
will be disabled)
POST - PRE : Selects w h a t s i g n a l w i l l b e d e l i v e r e d
b y t h e D I o u t p u t . S e l e c t i n g P R E , s e n d s a c l e a n c o p y
o f y o u r i n p u t b a s s s i g n a l . S e l e c t i n g P O S T d e l i v e r s a
s i g n a l p r o c e s s e d b y t h e p r e a m p o f t h e a m p ( g a i n ,
d i s t o r t i o n , e q , m a s t e r , e t c . )
GROUND LIFT : Lifts the ground of the DI XLR
output. If a ground noise in you DI signal is
experienced, try changing the setting of this control.
BALANCED OUTPUT: Connects the Microtubes 900
preamplifier to balanced equipment (mic preamp,
console, recorder, compressor, audio interface, etc.)
via a standard XLR jack.
FOOTSWITCH : The Footswitch allows you to remotely
engage and disengage the Microtubes Engine. Hold
the footswitch to Mute the amplifier. The VMT/B3K
push button will remain operational with the
Intelligent Footswitch plugged in.
