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Serial Number ___________________________________
Record your serial numbers here for easy reference. You will need this information
when filling out your warranty registration. Grotto i's serial number is located near
the bottom of the backplate and also on the shipping container.
Grotto i Settings:
Level ___________________________________________
25Hz Level ______________________________________
Phase __________________________________________
Low Pass Filter ___________________________________
A/V Processor Bass Management Settings:
Main Speaker Size ________________________________
(large recommended for full range speakers)
Center Speaker Size ______________________________
(small recommended)
Surround Speaker Size ____________________________
Level ___________________________________________
High-Pass _______________________________________
Low-Pass _______________________________________
WARNING! Do not use your Grotto i loudspeakers outside of the country of original sale—voltage requirements
vary by country. Improper voltage can cause damage that will be potentially expensive to repair. The Grotto i is
shipped to authorized MartinLogan distributors with the correct power supply for use in the country of intended
sale. A list of authorized distributors can be accessed at www.martinlogan.com or by emailing info@martinlogan.com.
(small recommended)
The lightning bolt flash with arrowhead symbol, within
an equilateral triangle, is intended to alert the user to
the presence of uninsulated "dangerous voltage" within
the product's enclosure that may be of sufficient mag-
nitude to constitute a risk of electric shock.
The exclamation point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in
the literature accompanying the appliance.
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