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AC Power Connection
WARNING! The power cord should not be
installed, removed, or left detached from the
subwoofer while the other end is connected to
an AC power source.
The IEC power cord should be firmly inserted into the AC
power receptacle on the rear connection panel of the Grotto,
then to any convenient AC wall outlet. The Grotto also
integrates a signal sensing power supply that will switch off
after a few minutes of no music signal if the power switch
is set to 'Auto'.
Your Grotto subwoofer is wired for the power service supplied
in the country of original consumer sale. The AC power rating
applicable to a particular unit is specified both on the packing
carton and on the serial number plate attached to the sub-
woofer.
If you remove your Grotto subwoofer from the country of
original sale, be certain that AC power supplied in any subse-
quent location is suitable before connecting and operating
the subwoofer. Substantially impaired performance or severe
damage may occur to the Grotto subwoofer if operation is
attempted from an incorrect AC power source.
Figure 13. IEC power cord AC receptacle and fuse.
12
Connections and Control Settings
Replacing the Fuse
If the fuse in your Grotto should require changing, turn your
Grotto off and unplug it before removing the fuse. Replace
the bad fuse with a matching 5 Amp slow-blow fuse (3 Amp
slow-blow if you are in a region using 230v–240v current).
Break-In
Our custom made woofers require approximately 50 hours of
break-in at moderate listening levels before their optimal per-
formance occurs. This will factor in on any critical listening
and judgment.
After six months of use, you may find that the
mounting screws on your Grotto need to be
tightened. To do this, use an
Do not tighten screws on your Grotto that do not
1
accept an
/
-inch allen tool.
8
1
/
-inch allen tool.
8
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