MartinLogan GROTTO - Manual

Level Knob Setting the level too high will cause the bass to seem bloatedand is the single most common cause of bad soundingsubwoofers. A rule of thumb is that the subwoofer shouldnot draw attention to itself, but should simply make thesystems low end seem more extended and accurate. Low Pass Filter...

C ONNECTIONS AND C ONTROL S ETTINGS MartinLogan engineers designed the Grotto for easy setupand system integration. Before beginning to connect yourGrotto, please review the controls discussed in the last sec-tion. An understanding of these will help speed you along asyou connect and integrate your ...

12 Connections and Control Settings WARNING! The power cord should not be installed, removed, or left detached from thesubwoofer while the other end is connected toan AC power source. The IEC power cord should be firmly inserted into the ACpower receptacle on the rear connection panel of the Grotto,...

P LACEMENT Placement 13 Generally, subwoofers have the most output when placed inthe corner of a room. However, this can also exaggerate thesubwoofers output making blending difficult. We recom-mend starting by placing the Grotto in a corner. If, after thefull range of tuning techniques have been em...

Terminology 14 Room Acoustics This is an area that requires both a little background tounderstand and some time and experimentation to attainthe best performance from your system. Your room is actually a component and an important part ofyour system. This component is a large variable and candramati...

After living and experimenting with your Grotto, you maywant to use ETC ™ (Energy Transfer Coupler) Spikes (see figure 16), available from the Xtatic shop at www.martinlo-gan.com. With the use of these spikes, the Grotto willbecome more firmly planted on the floor and, conse-quently, bass will tight...

It had long been the practice of stereo buffs to connecttheir television to the stereo system. The advantage was theuse of the larger speakers and more powerful amplifier of thestereo system. Even though the sound was greatly improved,it was still mono and limited by the broadcast signal. In the lat...

All dynamic drivers generate distortion caused by spiderand surround nonlinearities as well as voice coil inductivedisturbances and variant motor strength during massivewoofer excursions. These challenges plague all subwooferdesigners. The result? Induced harmonic and intermodulateddistortions causi...

18 Frequently Asked Questions & Troubleshooting F REQUENTLY A SKED Q UESTIONS & T ROUBLESHOOTING How do I clean my subwoofer? Use a dust free cloth or a soft brush to clean your subwoofer.We recommend a specialty cloth (available through theXtatic shop at www.martinlogan.com) that cleans bet...

19 The high-resolution, servo-controlled Grotto subwoofersystem consists of a single woofer for high SPL output withminimal distortion. The equalization used is specificallydesigned to counteract the response of the woofers sealedbox response. This equalization leads to minimal groupdelay and proper...

AC. Abbreviation for alternating current. Active crossover. Uses active devices (transistors, ICs, tubes) and some form of power supply to operate. Amplitude. The extreme range of a signal. Usually mea- sured from the average to the extreme. Arc. The visible sparks generated by an electrical dischar...

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