Infinity PRELUDE MTS Owner's Manual
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Infinity PRELUDE MTS Owner's Manual

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Summary of Contents for Infinity PRELUDE MTS

  • Page 1 ™ RELUDE Owner’s Guide...
  • Page 2 DO NOT REMOVE COVER (0R BACK) NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL THIS INFINITY PRODUCT IS DESIGNED FOR 120-VOLT USE ONLY! FOR DETAILED SAFETY PRECAUTIONS, PLEASE SEE FOLLOWING PAGE IN THIS OWNER’S MANUAL FOR “IMPORTANT SAFETY INSTRUCTIONS.”...
  • Page 3 Ground Clamps unless proper ventilation is provided or the manufacturer’s instructions have been adhered to. Power Service Grounding Electrode System (NEC Art. 250, Part H) PRELUDE MTS...

  • Page 4: Table Of Contents

    ™ Room Adaptive Bass Optimization System (R.A.B.O.S.) Contents of the R.A.B.O.S.Test CD The R.A.B.O.S. Sound-Level Meter (RSLM) What You Measure, What To Do Adjusting the R.A.B.O.S. Equalizer Final System Balance Maintenance and Service Specifications R.A.B.O.S. Measurement Templates Notes PRELUDE MTS...

  • Page 5: Technology

    The Prelude MTS system is a 4-way loudspeaker with its mid- assembly incorporates a vented polepiece for maximum heat bass, midrange and high-frequency-driver array mounted atop a dissipation with negligible air turbulence.The frame itself is also...

  • Page 6: Completing The Experience

    Allen Key (1) We hope you enjoyed this brief introduction to the technology of the Prelude MTS system. If you would like to further explore the technology and design of the Prelude MTS system, please ask your Infinity dealer for the C.M.M.D. and R.A.B.O.S. White Papers.

  • Page 7: Installing The Tower On Top Of The Subwoofer

    Prelude MTS. However, there are still several times when you will be asked to make a hookup or adjustment decision based upon the details of your particular system and listening room.Your...
  • Page 8 – Set Toggle Switch in tower cup in bottom to the – Insert double-ended Audio Banana Plug into tower “Full Range” position, unless you are connecting your system as shown. using Method 1 or Method 4 as shown on page 8 and page 10. PRELUDE MTS...
  • Page 9 Press flush into place two screw caps to hide holes in front baffle base. Make sure that the alignment slots point toward the center to assure that the surface curve matches that of the baffle. PRELUDE MTS...
  • Page 10 Each rear speaker should be about 1/3 of the way into the room, but never to the outside of the listening area. See Figure 3. As mentioned earlier, Prelude MTS offers several ways to fine- LEFT SOFA RIGHT tune the system for optimum performance in any listening room.

  • Page 11: Controls And Connections

    LEVEL LINE LEVEL BASS MODE AC FUSE ATTENTION – 1 2 3 6A 120V INPUT Subwoofer Front Panel R.A.B.O.S. Controls Line-Level-Input Connector Center-Frequency Adjustment Line-Level-Output Connector R.A.B.O.S. Level Bass-Mode Switch Bandwidth Adjustment Speaker-Level Input AC-Cord Input Subwoofer-Level Control PRELUDE MTS...

  • Page 12: Connection Methods

    2-Channel receiver or integrated amplifier If none of these system configurations seem to match yours, with preamp output and input connectors consult your dealer or Infinity customer service for direction on 2-Channel system with separate preamplifier how best to hook up your system.
  • Page 13 P R E L U D E M T S S U B W O O F E R BOTTOM OF TOWER CAUTION SPEAKER LEVEL LINE LEVEL BASS MODE TO FULL RANGE ATTENTION AC FUSE 1 2 3 – 6A 120V INPUT PRELUDE MTS...
  • Page 14 1 2 3 – 6A 120V INPUT After correctly connecting the Prelude MTS and verifying that both the subwoofer and tower portions are playing, it is time to optimize the system for your particular listening room. Final Positioning Earlier, you placed the loudspeakers in their general location.

  • Page 15: Room Adaptive Bass Optimization System ™ (R.a.b.o.s.)

    Prelude system.The Preparations optimization process takes less than 30 minutes. Before beginning R.A.B.O.S. tests, please check the following: • Make sure all three R.A.B.O.S. controls on the Prelude MTS The R.A.B.O.S. Kit Includes subwoofers are turned fully clockwise. the Following Components: •...

  • Page 16: Contents Of The R.a.b.o.s.test Cd

    The RSLM is a battery-operated, handheld, acoustic measurement illuminated. Replace the battery. device specifically designed for Infinity R.A.B.O.S. On the face of Do not attempt measurements when this light is on. the instrument is a light-emitting diode (LED) bar graph that indicates relative sound level.There are also indicators for...

  • Page 17: Setting The Subwoofer Test Level

    Strong buzzes not only sound bad, they can cause measurement errors. If you hear a buzz or rattle during this test, it is highly recommended that you PRELUDE MTS...
  • Page 18 RSLM. If this occurs during a test, place a dot at the intersection of the test frequency and the bottom frame of the template. See Figure 10. IGURE Indicating an under-range test PRELUDE MTS...

  • Page 19: What Does A Parametric Equalizer Do

    Width The frequency range of the R.A.B.O.S. equalizer may be set from 5% to 50% of an octave in 21 steps.This setting defines how much of the subwoofers’ output will be equalized. PRELUDE MTS...

  • Page 20: Using The Width Selector

    Place the Width Selector over the Measurement Template, positioning the center rivet of the Selector over the response peak, as shown in Figure 15. Be sure to align the horizontal lines of the Width Selector with those of the Measurement Template. PRELUDE MTS...

  • Page 21: What You Measure, What To Do

    Remember, when looking for a match, look at the descriptive characteristics, not any specific frequency or level. Each of these examples can occur at any frequency, bandwidth and level. It is unlikely that your test results will be exactly as depicted in these examples. PRELUDE MTS...
  • Page 22 Note that this does not eliminate the dips. We have simply moved away from them. Sometimes only a few inches are required. Do not attempt to correct this condition with equalization. If you encounter dips like this, take the following steps: PRELUDE MTS...
  • Page 23 We have simply moved away from them. Sometimes only a few inches are required. Do not attempt to correct this condition with equalization. If you encounter dips like this, take the following steps: PRELUDE MTS...

  • Page 24: Adjusting The R.a.b.o.s. Equalizer

    Follow the instructions for -7.9 the example that most closely matches your new measurement. -6.4 -4.4 Example 6. Ideal Response: -2.9 41.5% -1.9 43.5% -1.1 IGURE -0.5 46.5% Ideal response, no EQ needed 21 CW 49.5% PRELUDE MTS...

  • Page 25: Final System Balance

    R.A.B.O.S. controls. Simply count the number of detents necessary, indicated by the results of your R.A.B.O.S.Test. Prelude MTS R.A.B.O.S. Controls After performing these adjustments, you may skip forward to the “Final System Balance” section. It is recommended that you perform a second measurement to confirm that the settings are correct.

  • Page 26: Maintenance And Service

    AINTENANCE AND ERVICE The Prelude MTS Subwoofers have an oiled finish. Cleaning should be done with an untreated dust cloth. Do not use conventional furniture waxes and polishes, which are not designed for oiled finishes. If touch-up is necessary or the finish appears to be drying out, the surface may be re-oiled with a commercially available oil-finishing preparation.

  • Page 27: Specifications

    37" x 6-1/2" x 7-1/2" (940mm x 165mm x 191mm) Infinity continually strives to update and improve existing products, as well as create new ones.The specifications and construction details in this and related Infinity publications are therefore subject to change without notice.
  • Page 28 Frequency Width Frequency Width PRELUDE MTS...
  • Page 29 Frequency Width Frequency Width PRELUDE MTS...
  • Page 30 Frequency Width Frequency Width PRELUDE MTS...

  • Page 31: Notes

    NOTES: NOTES: PRELUDE MTS...
  • Page 32 © 2000 Infinity Systems, Inc., 250 Crossways Park Drive, Woodbury, NY 11797 USA (800) 553-3332 (USA Only) *Trademarks of Dolby Laboratories.THX is a registered trademark of Lucasfilm, Ltd. DTS is a registered trademark of Digital Theater Systems, Inc. BASH is a registered trademark of Indigo Corporation.

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