DEPTH u s e r ’ s c l TM m a n u a l s e l e c t r MA R T I N LOGA N o s t a t i c
CONTENTS Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 Installation in Brief . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 Introduction and Assembly . . . . . . . . . . . . . . . . . . . . . .4 Introduction Trim Removal and Installation About the Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Connections and Control Settings . . . . . . . . . . . . . . . . .6 Before Connecting the Depth 2-Channel Mode Multi-Channel Mode . . . . . .
INSTALLATION We know that you are eager to hear your new Depth subwoofer, so this section is provided to allow fast and easy set up. Once you have it operational, please take the time to read, in depth, the rest of the information in this manual. It will give you perspective on how to attain the greatest possible performance from this most exacting woofer system.
INTRODUCTION AND ASSEMBLY Introduction Congratulations! You have invested in one of the world's premier subwoofers. 1 Simultaneously push the two points of the trim closest to the front grill of the Depth. The MartinLogan Depth represents the culmination of an intensive, dedicated team research program directed toward establishing a world class reference subwoofer using leadingedge technology, without compromising durability, reliability, craftsmanship or aesthetics.
ABOUT THE CONTROLS Level Knob Setting the level too high will cause the bass to seem bloated and is the single most common cause of bad sounding subwoofers. A rule of thumb is that the subwoofer should not draw attention to itself, but should simply make the systems low end seem more extended and accurate. Status Light The Depth is equipped with a multi-color LED to indicate the subwoofers current status.
CONNECTIONS AND CONTROL SETTINGS Before Connecting the Depth MartinLogan engineers designed the Depth for easy setup and system integration. Before beginning to connect your Depth, please review the controls discussed in the last section. An understanding of these will help speed you along as you connect your Depth with your system. All signal connections are done at the signal input section on the rear connections panel of the Depth. Make certain that all of your connections are tight.
Multi-Channel Mode This setup is recommended if your Depth will be used in a dedicated home theater or multi-channel system. When a signal is connected to the Depth’s LFE input, Depth’s internal low pass filter is not active. By following this setup, you will allow your processor to handle most of the bass management. Signal Connection (see figure 4): 1 Connect the LFE/0.1 subwoofer output of the processor to the LFE input of the Depth using a quality interconnect.
2-Channel/Multi-Channel Mode Using an A/V processor and the Depth’s low pass filters. This setup is recommended if your Depth will be used in both 2-channel mode and as a LFE (0.1) channel in a multichannel mode. By following this setup, you will allow your processor to handle most of the bass management while running in multichannel mode, and relinquish control of the low pass filter to the Depth when running in a 2-channel mode.
2-Channel Mode Using Speaker Level Inputs This setup is recommended if your Depth will be used in a 2-channel only system. When a signal is connected to the Depth’s Left/Right Inputs, the Depth’s internal low pass filter is active. Signal Connection (see figure 8): 1 Connect the left and right outputs of your amplifier to the left and right speaker level (high level) inputs of the Depth using quality speaker cable.
2-Channel Mode With 2-Channel Output This setup is recommended if your Depth will be used in a 2-channel only system and you intend to use the Depth’s High Pass Filter Out. Signal Connection (see figure 10): 1 Connect the left and right outputs of your preamplifier to the left and right inputs of the Depth using quality RCA interconnects. 2 Connect the left and right outputs of your Depth to the left and right inputs of your amplifier using quality RCA interconnects.
Sub Out—Using Multiple Depths Using Sub Out offers an easy way to implement multiple Depth’s in your audio/video system. Note: All additional Depth subwoofers must run as either dedicated 2-channel (stereo) or multi-channel (LFE) subwoofers, but not both. Signal Connection: 1 Connect the first Depth to your system using one of the five modes previously described. 2 Connect the Sub Out of the previous Depth to either the LFE or the Right (or Left) input of the next Depth using a quality RCA interconnect.
AC Power Connection 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 Depth, then to any convenient AC wall outlet. The Depth 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'.
PLACEMENT Listening Position Generally, subwoofers have the most output when placed in the corner of a room. However, this can also exaggerate the subwoofers output making blending difficult. We recommend starting by placing the Depth in a corner. It should be placed in such a way that there are 2 inches between the grill cloth and the wall. This will avoid blocking the output of any woofers.
ROOM ACOUSTICS Your Room This is an area that requires both a little background to understand and some time and experimentation to attain the best performance from your system. Your room is actually a component and an important part of your system. This component is a large variable and can dramatically add to or subtract from a great sonic experience. All sound is composed of waves.
Solid Footing After living and experimenting with your Depth, you may want to use the ETC™ (Energy Transfer Coupler) Spikes (see figure 17), included with your Depth. With the use of these spikes, the Depth subwoofer will become more firmly planted on the floor and, consequently, bass will tighten. 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 subwoofer is moved.
HOME THEATER It had long been the practice of stereo buffs to connect their television to the stereo system. The advantage was the use of the larger speakers and more powerful amplifier of the stereo system. Even though the sound was greatly improved, it was still mono and limited by the broadcast signal. In the late 1970's and early ‘80's two new home movie formats became widely available to the public: VCR and laser disc. At the same time video screen sizes began increasing.
DEPTH ADVANTAGES BalancedForce™ For Cleaner Bass Resulting from an equal and opposite reaction to the cone's movement, strong bass causes traditional subwoofer enclosures to generate acoustic vibrations. You feel this by touching the cabinet. Although the "physics" of this phenomenon actually cause a subwoofer cabinet to resonate or even dance, most subwoofer designers apply weight or mass to the cabinet to minimize such disturbances. This leaves one by product—"smeared bass".
FREQUENTLY ASKED QUESTIONS & TROUBLESHOOTING Frequently Asked Questions Troubleshooting 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 the Xtatic shop at www.martinlogan.com) that cleans better than anything else we have tried. No Output • Check that all your system components are turned on. • Check that the power switch on the Depth is set to either 'Auto' or 'On'. • Check your wires and connections.
GENERAL INFORMATION Specifications The high-resolution, servo-controlled Depth subwoofer system consists of multiple woofers for high SPL output with minimal distortion. The woofers are arranged in a BalancedForce array that dramatically lowers cabinet vibrations. This approach leads to tight, well-defined and deep bass output. The equalization used is specifically designed to counteract the response of the woofers sealed box response.
GLOSSARY OF AUDIO TERMS 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 measured from the average to the extreme. Arc. The visible sparks generated by an electrical discharge. Bass. The lowest frequencies of sound. Bi-Amplification.
Inductor. A device designed primarily to introduce inductance into an electrical circuit. Sometimes called a choke or coil. Linearity. The extent to which any signal handling process is accomplished without amplitude distortion. SPL. The abbreviation for sound pressure level. Stator. The fixed part forming the reference for the moving diaphragm in a planar speaker. LFE. The abbreviation for low frequency effects. THD. The abbreviation for total harmonic distortion. (See Distortion.) Midrange.
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