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TM
D ESCENT i
user’s manual
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Serial Number ___________________________________ The lightning bolt flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to Record your serial numbers here for easy reference. You will need this information the presence of uninsulated “dangerous voltage” within when filling out your warranty registration. Descent i’s serial number is located near the product’s enclosure that may be of sufficient mag- the bottom of the backplate and also on the shippi
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Thank you—to you the MartinLogan owner, for loving what we do, and for making it possible for us to do what we love.
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CONTENTS & INTRODUCTION Contents & Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 Congratulations! You have invested in one of the Installation in Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 world's premier subwoofers. Controls and Connections . . . . . . . . . . . . . . . . . . . . . . . 6 Accessing the Control Panel The MartinLogan Descent i represents the culmination Control Panel of an intensive, dedicated research program directed Rear Connect
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INSTALLATION IN BRIEF We know you are eager to hear your new MartinLogan Step 1: Unpacking subwoofer, so this section is provided to allow fast and Remove your new subwoofer from its packing. Note: easy set up. Once you have your subwoofer operation- Retain original packing materials for future use. al, please take the time to read, in depth, the rest of the information in this manual. It will give you perspective on Step 2: Placement how to attain the greatest possible performance from this
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CONTROLS AND CONNECTIONS Accessing the Control Panel The control panel is located behind the inset metal plate in 2-channel mode (via its speaker or line level left/right located on top of the subwoofer. To access the control input), the low-pass filter is active. panel, gently press the area above the MartinLogan logo. When the spring releases gently pull the metal plate away As a general rule the Low Pass Filter should be set at the option from the subwoofer. approximately equal to (or bel
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configuration of your listening environment, the placement of the unit, and your seating arrangement. Due to the way bass sound waves develop in different rooms, there is no rule of thumb for setting phase. For instance, if your room has a peak at the subwoofer crossover area, you may wish to set the phase so the actual acoustic outputs of the subwoofer and main speakers are out of phase. Experiment, try dif- ferent settings and be patient. Power The Auto/On/Standby switch controls Descent
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Rear Connection Panel Sub Out For systems utilizing multiple subwoofers. Connect Sub Out to the LFE Input or Right In / Left In on additional sub(s). Status Light The Descent i is equipped Right Out / Left Out with a multi-color LED to Should only be used if con- indicate the current sta- necting this sub between tus of the woofers. The a pre-amp and amplifier. following list explains the Connect to the Left In/Right meaning of the different colors: In on the amplifier. The High Pass: Ou
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WARNING! Turn the Master Power switch Off and unplug it before making or breaking any signal connections! 2-Channel Mode This setup is recommended if your subwoofer will be used in a 2-channel only system. When a signal is connected to the subwoofers Left In/Right In, the Low Pass Filter control is active. Signal Connection (see figure 4): 1 Connect the left out/right out from your preamp/receiver to the Left In/Right In of the subwoofer. Use quality RCA interconnects. If your preamp/rece
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Multi-Channel Mode This setup is recommended if you will use your subwoofer in a dedicated home theater or multi-channel system. When a signal is connected to the subwoofer’s LFE In, the Low Pass Filter control is NOT active. Your processor handles most of the bass management. Signal Connection (see figure 6—RCA shown): 1 Connect the LFE out of the processor to the LFE In. Use either an RCA or an XLR interconnect. WARNING! Based on the performance of most processors, it is recommended tha
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2-Channel/Multi-Channel Mode This setup is recommended if your subwoofer will be used in both 2-channel mode and as a LFE chan- nel in a multi-channel system. By following this setup, you will allow your processor to handle most of the bass management while running in multi-channel mode, and relinquish control of the low pass filter to the subwoofer when running in a 2-channel mode. Signal Connection (see figure 8): 1 Connect the left and right out of your preamplifier to the subwoofer’s Le
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2-Channel Mode Using Speaker Level Inputs This setup is recommended if your subwoofer will be used in a 2-channel only system with full-range front loudspeakers. When a signal is connected to the subwoofer’s Left In/Right In subwoofer’s Low Pass Filter control is active. Signal Connection (see figure 10): 1 Connect the left and right outputs of your amplifier to the subwoofer’s high-level Speaker Level In (Left In/Right In) binding posts. Use quality speaker cable. If your amplifier only h
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2-Channel Mode With 2-Channel Output This setup is recommended if your subwoofer will be used in a 2-channel only system. Signal Connection (see figure 11): 1 Connect the left out/right out from your preamplifier to the Left In/Right In of the subwoofer. Use quality RCA interconnects. 2 Connect the Left Out/Right Out of your subwoofer to the left in/right in of your amplifier. Use quality RCA interconnects. Recommended Control Settings: 1 Set the controls as recommended on page 9. 2. The H
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Sub Out—Using Multiple Subwoofers Using Sub Out offers an easy way to implement multiple subwoofers in your audio/video system. Note: Additional subwoofers must run as either dedicated 2-channel (stereo) or multi-channel (LFE) subwoofers, but not both. Signal Connection: 1 Connect the first subwoofer to your system using one of the five modes previously described. 2 Connect the Sub Out of the first subwoofer to either the LFE In or the Right (or Left) In of the next subwoofer. Use quality
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AC Power Connection Replacing the Fuse WARNING! The power cord should not be If the fuse in your subwoofer should require changing, installed, removed, or left detached from the turn your subwoofer off and unplug it before removing subwoofer while the other end is connected to the fuse. Replace the bad fuse (figure 15) with a matching an AC power source. T 10A H 250V (T 5A L H 250V if you are in a region using 230v–240v mains voltage). The IEC cord should be firmly inserted into the AC po
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PLACEMENT Listening Position Generally, subwoofers have the most output when placed in the corner of a room. However, this can also exagger- ate the subwoofers output making blending difficult. We recommend starting by placing the subwoofer in a corner. It should be placed in such a way that there are 2 inches between the grill and the wall. This will avoid blocking the output of any woofers. If, after the full range of tuning techniques have been employed, the subwoofer sounds like it ha
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ROOM ACOUSTICS Your Room Terminology This is an area that requires both a little background to Standing Waves understand and some time and experimentation to attain Sound coming from a subwoofer bounces around in a the best performance from your system. room until a pattern emerges—this is called a standing wave. Typically, this is only a problem with frequencies Your room is actually a component and an important part below 100Hz. When this happens different parts of your of your system. Thi
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Solid Footing After living and experimenting with your subwoofer, you may want to use ETC (energy transfer coupler) spikes sup- plied with the subwoofer (see figure 18). With the use of these spikes, the subwoofer will become more firmly planted on the floor and, consequently, bass will tighten and imaging will become more coherent and detailed. It is best not to implement the spikes, however, until you are secure in the positioning, as the spikes can damage the floor if the speaker is mo
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HOME THEATER It had long been the practice of stereo buffs to connect Surround Speakers their television to the stereo system. The advantage was the The surround, or effect speakers contain critical informa- use of the larger speakers and more powerful amplifier of the tion. In films, sound effects are vital to the director in stereo system. Even though the sound was greatly improved, delivering a complete experience and the rapid technical it was still mono and limited by the broadcast signal
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MARTINLOGAN EXCLUSIVES BalancedForce™ For Cleaner Bass Resulting from an equal and opposite reaction to the cone's MartinLogan’s advanced servo system uses a sophisticated movement, strong bass causes all traditional subwoofer monitoring and control circuit to detect and instantaneous- enclosures to generate acoustic vibrations. You feel this by ly correct any deviation between acoustical output and touching the cabinet. Although the "physics" of this phe- electrical input. The result? A reduc
