Lift / Ground, D.i. Level; Solo Control - Mesa/Boogie BASS PRODIGY Four 88 Owner's Manual

NOTE: The D.I. OUTPUT will have signal present when in the PRE selection even when STANDBY is used to mute the signal to the
power section (STANDBY position) as this is the direct signal straight from your instrument before it goes through the amplifier.
NOTE: POST does not capture and include the power section of your amplifier.
D.I. LIFT / GROUND
isolating the path to Ground for the PRODIGY circuit. This can be very helpful in live sound front of house or Monitor applications as
D.I. PRE
D.I.
LEVEL
POST
D.I. LIFT
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GROUND
including things beyond your control elsewhere on the AC Line you are connected to (outside your house, studio or venue). The D.I.
LIFT/GROUND switch can't cure those other outside factors, but it can relieve one of the more common sources of hum found when
interfacing to Consoles that arises when the amplifier's Ground and the Console Ground create a loop.
D.I. LEVEL
This Control determines the signal strength at the Rear Panel XLR D.I. OUTPUT Jack. We have located the D.I.
LEVEL on the Front Panel to offer you easy adjustment of the D.I. Level at Sound Check or even during a performance. The D.I.
D.I. PRE
D.I.
LEVEL
POST
D.I. LIFT
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GROUND
It is also wise to follow this regimen in reverse. Make it habit to zero out the D.I. LEVEL at the end of each performance or session. If
you are in a hurry when you set-up to use the PRODIGY you'll avoid an embarrassing and sonically unpleasant mistake.

SOLO CONTROL™

footswitchable boost for when it's time to step out and showcase important parts during a performance. You can use the (optional)
SOLO
STANDBY
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™
NOTE: The SOLO may not be used to achieve a volume level lower than that set by the MASTER control... it is a boost only feature.
NOTE: The SOLO control is optimized for performance level operation and therefore provides the best functionality in the middle
range of the MASTER control. It is normal to experience decreased effectiveness of the SOLO Feature at both the lowest and highest
regions of the MASTER control.
This 2-position mini toggle offers the ability to lift the Circuit Ground from the Chassis Ground, effectively
well as in Recording environments.
LIFT isolates the Circuit to Chassis Ground, preventing these types of ground loops when interfacing to
consoles.
GROUND connects the Circuit Ground to the Chassis and should be used whenever possible. Use this
position at all times when you are NOT connecting the D.I. OUTPUT to a console.
Sometimes – not always – this will help you isolate and remove unwanted hum or buzz from the equa-
tion. Remember that there are a myriad of noises and hums that can be caused from many sources,
OUTPUT on the Rear Panel is optimized for use directly into mixing consoles and the D.I. LEVEL Control
will allow for more than adequate signal level and plenty of room for adjustment within that window.
NOTE: IMPORTANT! It is a wise practice whenever interfacing with Consoles – whether Recording
or Live Sound – to ALWAYS begin your set-up regimen by zeroing out the D.I. LEVEL control BEFORE
flipping the POWER switch to the ON position. This will prevent damage to the Console, Speakers or
bystanders' ears should the D.I. LEVEL accidentally be set too high. This practice allows you to bring up
the D.I. LEVEL slowly while the Engineer monitors the incoming signal strength and safely reaches an
optimum level.
Your PRODIGY is equipped with our patented SOLO™ Feature that provides you with a pre-settable,
PRODIGY Footswitch to engage this feature or you can trigger the SOLO LEVEL via a tip-to-ground
latching switch connected to the Rear Panel jack labeled SOLO in the EXT. (external) SWITCHING jacks
section (left rear).
ON
This feature can be used to increase the playing volume to the amount set by the SOLO control when
POWER
engaged. To use SOLO, simply connect your Footswitch or external trigger, set your playing volume with
ON
the MASTER control, hit the SOLO button on the Footswitch, and set the desired amount of boost with
the SOLO control. Now you have the added flexibility of a second "MASTER" control that you can call up
at any time from the Footswitch.
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