Mesa/Boogie Express series, Руководство пользователя, Страница: 13 / 38

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reAr PANeL: C
ONTrOLS
& F
eATureS
EXTERNAL SWITCHING:
These four ¼ “ jacks trigger the Channels, REVERB and CONTOUR feature of each Channel when
you want to control your Express with a master external switcher. In this way you can call up the sounds on your Express remotely
without connecting the Footswitch and have your effects and amp sounds respond to a single button (possibly
midi) program change command.
Simply connect standard unshielded (speaker) ¼” phone cables to these four jacks and short the “tip” to “ground” to
activate the features. This standard tip-to-ground “latching type” logic is supported on most all master switching de-
vices so all you will have to do is program what ports on your switcher will be grounded under which programs.
EFFECTS LOOP:
The
Express
incorporates an internal EFFECTS LOOP to handle the interfacing of outboard processing. This
circuit is a patch point between the preamp and the power section and it is wired in series with the dry (un-affected) signal. Since
this loop is a series-type loop (as opposed to parallel - where the loop signal runs alongside the dry signal) it is
important that you use good quality processors “in the middle” of your amp. While the loop is compatible with most
processor Input/Output impedance demands, there can be a lot of room for sonic compromise in some of the less
expensive units. Remember that every part in your signal path is a tone part.
NOTE:
Always use good quality shielded cable of the shortest possible length when patching your effects. One foot
lengths are preferable - with lengths of more than 3 feet (each cable) starting to roll off top end and reduce upper
midrange punch and top end clarity.
To use the
EFFECTS LOOP;
1) Connect the SEND jack to your processor’s Input
2) Connect the RETURN jack to your processor’s Output
3) Adjust the processor’s Input/Output Level attenuator to achieve unity gain while plugging the RETURN cable in and out making
fine adjustments at the processor until you here no level difference.
NOTE:
The
EFFECTS LOOP
is optimized for professional quality rack mount processors. Most pedal type effects work better in the
“front-end” between your instrument and the INPUT. You will experience some tonal changes because of the additional cable and
the fact that your instrument will no longer be going straight into the grid of the first tube. It’s up to you to decide if the trade off is
acceptable.