MAIN OUTPUT JACKS (POST-MASTER)
These six 1/4" jacks serve as the post-master audio outputs for your Mini-Mo’ Preamp. They are the
designated outputs for connection to the power amp being used to drive the speakers for your rig
onstage, while the pre-master outputs can be used simultaneously to send audio to a front-of-house
mixing board or external effects device. They also can be used as outputs in the studio if you wish to
retain control of the master output level by way of using the Master Volume controls on the front of the
Mini-Mo’ Preamp. Each of the two left, right and mono main outputs are wired in parallel, so it doesn't
matter which output (1 or 2) of each you use. Use high-quality patch cable to connect your audio at all
times, and try to keep the patch cable length at a minimum so as to reduce noise and potential signal
loss.
While there are myriad "correct" ways to connect the main outputs of your Mini-Mo’ Preamp to different
kinds of power amps, here are the two most basic guidelines:
With a stereo power amp - use left and right main outputs
With a mono power amp - use mono main output
LINE (MAINS) FUSE
The size and rating of the Line Fuse is 3AG, 1/2 amp, slo-blo. It serves to protect your amplifier's power
supply and transformer from large voltage spikes caused by an external source, and also serves to
protect the transformer in the unlikely event of a power supply failure. NEVER replace this with a fuse of
a higher rating as it will void your warranty.
A/C CORD RECEPTACLE
This receptacle accepts a standard A/C power cable (supplied with the Mini-Mo' Preamp), the same kind
used with almost all current musical, professional and household electronic devices. If it does become
misplaced, replacement will be easy at almost any appliance store, supermarket or the like. Make sure
the AC cord is plugged firmly into both the amplifier and the wall socket. If your cord ever becomes
frayed or split, don't fool around––replace it immediately.
INTERNAL FEATURE - VACUUM TUBE (VALVE)
SWR installs a specially selected 12AX7 dual triode on the motherboard of every Mini-Mo' Preamp. If
this tube needs replacing, we recommend that you replace it with a similar high quality product. This
tube will need replacing only if it becomes noisy or microphonic (sounds like glass tinkling in the
background of certain notes), or completely fails (causing no signal or signal at very low levels). As
mentioned in the "Preamp Controls" section of the manual, it should last one to three years, depending
on usage.
RACK MOUNTING INSTRUCTIONS
To preserve the beauty and reliability of your amplifier, we recommend that you install your amplifier in a
rack case. The Mini-Mo' Preamp is completely ready to be rack mounted and needs no additional parts
or accessories other than the rack screws and the case itself.
The Mini-Mo' Preamp takes up three full rack spaces (5.38"). If the rack that you mount the Mini-Mo'
Preamp in requires that the rubber feet on the bottom of the chassis be removed, please remember to
keep the screws handy in case you wish to reattach the rubber feet at a later date.
Please do not forget about your amp after it has been installed in a rack case. Continuous
transportation and vibration can cause screws to become loose, both on the Mini-Mo' Preamp and with
your rack case rails. We recommend that at least once a month you remove the Mini-Mo' Preamp from
the case and tighten all outside screws (especially the rear mounted screws holding on the handles
connected to the front panel) and wipe off the outside of the chassis with a damp cloth. Then check all
the connections in your rack case and reinstall the unit.
25 • MINI-MO’ OWNER’S MANUAL