Related Manuals for MartinLogan GROTTO
Summary of Contents for MartinLogan GROTTO
- Page 1 R O T T O u s e r ’ s m a n u a l ® A R T I N O G A N the loudspeaker technology company...
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Page 2: Table Of Contents
Home Theater ......16 Grotto Advantages ..... . .17... -
Page 3: Installation In Brief
Remove your new Grotto subwoofer from its packing. Step 2: Placement Ideally, place the Grotto in a corner near the front of the room. This is a good place to start. Please see the Placement sec- tion (page 13) of this manual for more details. -
Page 4: Introduction
MartinLogan and non-MartinLogan prod- ucts both seamless and simple. Introduction and Assembly The materials in your new Grotto subwoofer are of the highest quality and will provide years of enduring enjoy- ment and deepening respect. The cabinetry is constructed from the finest composite material for acoustical integrity and is finished with our attractive custom coating. -
Page 5: About The Controls
Example: The MartinLogan Aeon i’s lowest frequency response is 43Hz. 70% of 43Hz equals 30.1, so you should set the Grotto’s low pass filter to 30Hz. Remember, this is a general rule. We advise that once you try the recommended setting using the formula above, you should try the surrounding settings to see which sounds best. -
Page 6: Connections And Control Settings
2-Channel Mode This setup is recommended if your Grotto will be used in a 2-channel system with main speakers playing full range. When a signal is connected to the Grotto’s Left/Right Inputs, the Grotto’s internal low pass filter is active. -
Page 7: Multi-Channel Mode
Multi-Channel Mode This setup is recommended if your Grotto will be used in a dedicated home theater or multi-channel system. When a signal is connected to the Grotto’s LFE input, Grotto’s inter- nal low pass filter is not active. By following this setup, you will allow your processor to handle most of the bass management. -
Page 8: 2-Channel/Multi-Channel Mode
2-Channel/Multi-Channel Mode Using an A/V processor and the Grotto’s low pass filters. This setup is recommended if your Grotto will be used in both 2-channel mode and as a LFE (0.1) channel in a multi- channel mode. By following this setup, you will allow your... -
Page 9: 2-Channel Using Speaker Level Inputs
This setup is recommended if your Grotto will be used in a 2-channel only system with full-range front loudspeakers. When a signal is connected to the Grotto’s Left/Right Inputs, the Grotto’s internal low pass filter is active. Signal Connection (see figure 8):... -
Page 10: 2-Channel Mode With 2-Channel Output
2-Channel Mode With 2-Channel Output This setup is recommended if your Grotto will be used in a 2-channel only system. Signal Connection (see figure 10): 1 Connect the left and right outputs of your preamplifier to the left and right inputs of the Grotto using quality RCA interconnects. -
Page 11: Why The Filters Are Not Equal Sub Out-Using Multiple Grottos
2 Connect the Sub Out of the previous Grotto to either the LFE or the Right (or Left) input of the next Grotto using a quality RCA interconnect. Connecting to the LFE input allows additional subwoofers to perform as dedicated LFE channels (see figure 11). -
Page 12: Ac Power Connection
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). -
Page 13: Placement
Fresco™ as the center channel. Note the corner placement of the Grotto at the front of the listening room. Figure 15. Placing the Grotto in a cabinet requires a minimum of three inches of open space on the front and back. -
Page 14: Room Acoustics
Usually, you can excite most of the standing waves in a room by putting the Grotto in a corner. Listening position determines which standing waves you will experience. For instance, if you sit in a corner you will hear most of the standing waves. -
Page 15: Solid Footing
(racks, speakers, etc). Spike Installation Instructions: 1 Carefully remove the grill cloths from your Grotto. 2 Carefully lay the Grotto on its side to gain access to the bottom. 3 Remove existing feet or spikes. Thread new spikes into holes and screw them in all of the way. -
Page 16: Home Theater
Good sub- woofers will provide a foundation for the rest of the system. Figure 17. Grotto Subwoofers as the LFE (effects) channels, MartinLogan Clarity speakers as front and surround (effects) channels, MartinLogan... -
Page 17: Grotto Advantages
25Hz Level Control The Grotto 25Hz level control allows custom sound tailoring capabilities found in few subwoofers. A room, especially when small, can greatly exaggerate bass in the 20–30Hz range. -
Page 18: Frequently Asked Questions & Troubleshooting
Troubleshooting No Output • Check that all your system components are turned on. • Check that the power switch on the Grotto is set to either 'Auto' or 'On'. • Check your wires and connections. • Check all interconnecting cables. -
Page 19: General Information
(38.1 cm W x 32.8 cm D x 39 cm H) ENERAL NFORMATION Warranty and Registration Your Grotto subwoofer is provided with an automatic Limited 90 Day Warranty coverage. You have the option, at no additional charge, to receive Limited 3-Year Warranty coverage. To obtain the Limited... -
Page 20: Glossary Of Audio Terms
Impedance. The total opposition offered by an electric circuit to the flow of an alternating current of a single frequency. It is a combination of resistance and reactance and is measured in ohms. Remember that a speaker’s impedance changes with frequency, it is not a constant value. - Page 21 Sensitivity. The volume of sound delivered for a given electrical input. Stator. The fixed part forming the reference for the moving diaphragm in a planar speaker. THD. The abbreviation for total harmonic distortion. (See Distortion) TIM. The abbreviation for transient intermodulation distortion.
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Page 22: Notes
OTES Notes... - Page 23 Notes...
- Page 24 ® A R T I N O G A N the loudspeaker technology company 2101 Delaware Street, Lawrence, Kansas 66046, USA tel 785.749.0133 fax 785.749.5320 www.martinlogan.com Rev. #052103 ©2003 MartinLogan. All rights reserved.