MartinLogan Grotto [12/24] Ac power connection

12 Connections and Control Settings

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.

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

/8-inch allen tool.

Do not tighten screws on your Grotto that do not

accept an

/8-inch allen tool.

AC Power Connection Replacing the Fuse

Figure 13. IEC power cord AC receptacle and fuse.