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PRELUDE MTS

Caution

iii

Important Safety Precautions

Technology

Ceramic Metal Matrix Diaphragms

™

(C.M.M.D.)

Transducers

Room-Friendly Acoustical Design

Completing the Experience

Unpacking the Product/Included Accessories

Installation of the Prelude System

Installing the Tower on Top of the Subwoofer

Placement of the Components

Controls and Connections

Connection Methods 1–4

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

Table of Contents

RELUDE

MTS O

WNER

’

UIDE

Содержание Prelude MTS Center

Страница 1: ...Owner s Guide PRELUDE MTS ...

Страница 2: ...pérations et l entretien service dans les manuels fournis avec l appareil ATTENTION POUR EVITER LES CHOCS ELECTRIQUES INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQUAU FOND Este destello luminoso con un símbolo de punta de flecha dentro de un triángulo equilátero tiene el objectivo de alertar al usuario sobre la presencia de voltaje peligroso ...

Страница 3: ...g conductors location of antenna discharge unit connection to grounding electrodes and requirements for the grounding electrode See Figure A 16 Lightning For added protection for this product during a lightning storm or when it is left unattended and unused for long periods of time unplug it from the wall outlet and disconnect the antenna or cable system This will prevent damage to the product due...

Страница 4: ...lling the Tower on Top of the Subwoofer 6 Placement of the Components 7 Controls and Connections 8 Connection Methods 1 4 11 Room Adaptive Bass Optimization System R A B O S 12 Contents of the R A B O S Test CD 12 The R A B O S Sound Level Meter RSLM 17 What You Measure What To Do 20 Adjusting the R A B O S Equalizer 21 Final System Balance 22 Maintenance and Service 23 Specifications 24 R A B O S...

Страница 5: ...nating coloration due to cone breakup and dramatically reducing distortion And when ceramic metal matrix transducers are exposed to moisture sunlight or extreme temperatures their performance does not deteriorate Transducers In addition to ceramic diaphragms all the transducers incorporate magnetic shielding and rigid cast frames that through our FEA computer modeling and scanning laser vibrometer...

Страница 6: ... perfect digital multichannel loudspeaker system To complete a home theater system Infinity has designed to the same precise standards as the Prelude MTS a matching 3 way center channel loudspeaker In addition the tower portions of the Prelude MTS are available separately for use as full range surround channels The towers can be either wall mounted or attached to matching stands for floor placemen...

Страница 7: ...pen each accessory pack and locate the following items feet with spike round ends four locking nuts four nylon domes and one wrench 2 Lay each speaker on its side and locate the two threaded holes on the bottom 3 For carpets screw the round end of a foot into each hole and fully hand tighten a nut onto each one For hard surface floors screw the spike end into each hole instead and leave the rounde...

Страница 8: ...ENT PINS VIEWING CUP IN BOTTOM OF SPEAKER TOWER Hi gh Pa ss Fu ll Ra ng e DOUBLE ENDED BANANA PLUG STEP 4 Screw alignment pins into cup in bottom of tower using two per tower Screw threaded ends into holes and tighten until snug DO NOT overtighten STEP 5 Insert double ended Audio Banana Plug into tower as shown STEP 6 SUBWOOFER TOP FRONT VIEW METAL BRACKET 10 32 MACHINE SCREWS 4 PHILLIPS Add metal...

Страница 9: ...ad Screws through the tower base as shown two through the front baffle and two in the rear slot 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 STEP 8 SUBWOOFER SPEAKER TOWER BRACKET GUIDES GUIDE HOLES FOR ALIGNMENT PINS Slowly lower the tower assembly ont...

Страница 10: ...d that the driver of each subwoofer face toward the outside and this is how the subs are packaged For some rooms however the system may perform better with the woofers facing the inside Feel free to experiment Surround Channels in a Home Theater System When used as part of a Dolby ProLogic THX or discrete 5 1 channel home theater system the surround speakers should be placed at the sides of and di...

Страница 11: ... Level Control R A B O S Controls 7 Center Frequency Adjustment 8 R A B O S Level 9 Bandwidth Adjustment IN OUT 1 2 3 AC FUSE 6A 120V 120V 60 HZ 6A BASS MODE CAUTION ATTENTION LINE LEVEL INPUT SPEAKER LEVEL 1 2 3 4 5 P R E L U D E M T S S U B W O O F E R F L W 0 1 6 7 8 9 2 CONTROLS AND CONNECTIONS Subwoofer Rear Panel Subwoofer Front Panel ...

Страница 12: ... ON BOTTOM OF TOWER TO HIGH PASS INPUT SPEAKER LEVEL 1 2 3 4 BLACK NO STRIPE STRIPE RED SPEAKER OUTPUTS P R E L U D E M T S S U B W O O F E R IN OUT 1 2 3 AC FUSE 6A 120V 120V 60 HZ 6A CAUTION ATTENTION BASS MODE LINE LEVEL PREAMP OUTPUTS L R ONE CHANNEL SHOWN L R AMPLIFIER INPUTS BLACK STRIPE RED NO STRIPE LOOSEN TERMINALS INSERT BARE END TIGHTEN TERMINALS SET BASS MODE TO POSITION 2 SET SWITCH O...

Страница 13: ...ET SWITCH ON BOTTOM OF TOWER TO FULL RANGE 1 2 3 4 P R E L U D E M T S S U B W O O F E R P R E L U D E M T S S U B W O O F E R AMPLIFIER PROCESSOR IN OUT 1 2 3 AC FUSE 6A 120V 120V 60 HZ 6A CAUTION ATTENTION BASS MODE SUBWOOFER LFE OUTPUT TO SECOND SUBWOOFER SPEAKER OUTPUT INPUT LINE LEVEL L R FRONT CHANNEL OUTPUT L R ONE CHANNEL SHOWN INPUT SPEAKER LEVEL LOOSEN TERMINALS INSERT BARE END TIGHTEN T...

Страница 14: ...ally better focus of instruments and vocalists however moving the speakers too close together can reduce the spaciousness of the stage effect and you may need to experiment with the trade off between focus and imaging If your listening room is larger than average and your listening position is relatively far from the speakers wider placement of the speakers may be required RECEIVER IN OUT 1 2 3 AC...

Страница 15: ...s and equalizers to optimize speakers to the installation This has never been practical for the home audiophile This is why R A B O S was created R A B O S enables you to identify the dominant low frequency response characteristic of your room Once you know the problem R A B O S provides the tools needed to optimize the low frequency characteristics of the speakers to the room they are in exactly ...

Страница 16: ... battery operated handheld acoustic measurement device specifically designed for Infinity R A B O S On the face of the instrument is a light emitting diode LED bar graph that indicates relative sound level There are also indicators for power on out of range signals and a low battery Track Title 1 Welcome 2 Set System Test Level 3 Set Subwoofer Test Level 4 100Hz Test 5 95Hz Test 6 90Hz Test 7 85Hz...

Страница 17: ...ng before you begin this test The gain control 6 should be set to the mid position 5 Cue Track 3 and Pause II Track 3 continuously steps through all subwoofer test tones for approximately 1 minute Each tone will play just long enough for the RSLM to give a stable reading To get accurate measurements it is necessary to play the woofers quite loud The 0dB indication is about 94dB At this level frequ...

Страница 18: ...dB Y axis Place a dot at that point See Figure 9 It takes a few seconds for the RSLM reading to stabilize especially at very low frequencies Don t rush Give each test adequate time for the meter to stabilize At the bottom of the bar graph is a green ON LED This LED is illuminated whenever the sound level is below the measuring range of the RSLM If this occurs during a test place a dot at the inter...

Страница 19: ...n Figure 12 Use this tutorial to become familiar with the process Strategies for several other test results will be presented later After you have completed these three entry fields you will be ready to perform the adjustments completing R A B O S optimization Frequency The frequency of the R A B O S equalizer may be adjusted to any one of nineteen frequencies from 20Hz to 80Hz This defines where ...

Страница 20: ...lice becomes narrower and wider respectively The pointers on the sides of the button point to the bandwidth that corresponds to the width of the slice 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 Apply...

Страница 21: ...st method in all cases The next section contains several other examples What You Measure WhatTo Do As stated earlier it is not possible to anticipate the effect of every possible listening environment However most residential sound rooms share many characteristics and their dimensions fall into a range that make some response irregularities far more likely than others On the following pages are ex...

Страница 22: ...e a 8dB setting However this peak does not reach the 0dB level as the lower peak does Therefore a 8dB setting would be excessive The 52Hz peak stops at 2dB Subtracting 2 from 8 yields the correct setting 6dB Enter 6 in the Level field Skip to the Adjusting the R A B O S Equalizer section on page 20 Example 3 Peak Adjacent to a Dip Response dips can occur at any frequency sometimes immediately adja...

Страница 23: ... to the examples given in this section of the manual Follow the instructions for the example that most closely matches your new measurement Example 4 Narrow Response Although it looks as though this speaker is quite bass deficient this is actually indicative of a single very narrow peak in excess of 10dB high Apply the Width Selector as described above Align the center line of the Selector over th...

Страница 24: ...ed Connect the dots Your second measurement will no longer exhibit the deep response dips However the peak will still be evident Without the influence of the response dips the amplitude and center of the peak may have changed 4 Interpret the new data Compare your new data to the examples given in this section of the manual Follow the instructions for the example that most closely matches your new ...

Страница 25: ...s for only a few seconds and there is no frequency announcement If you are uncomfortable operating at this pace you may of course perform measure ments with the original test tracks Your first interpretation of the data and choice of settings may not be optimum You can repeat the test adjust test cycle as often as needed to get the desired results To do this return to page 13 Setting the Subwoofer...

Страница 26: ... solvents on the grille All wiring connections should be inspected and cleaned or remade periodically The frequency of maintenance depends on the metals involved in the connections atmospheric conditions and other factors but once per year is the minimum If a problem occurs make sure that all connections are properly made and clean If a problem exists in one loudspeaker reverse the connection wire...

Страница 27: ...B SPL Crossover Frequencies 80Hz 300Hz 2kHz 24dB Octave Dimensions 37 x 6 1 2 x 7 1 2 940mm x 165mm x 191mm Prelude MTS Subwoofer Frequency Response 23Hz 80Hz 3dB 30Hz 80Hz 1 5dB Maximum Amplifier Output 850 watts continuous In to 8Ω from 20Hz 100Hz 2 600 watts peak with no more than 0 1 THD 2nd and 3rd Order 1 Harmonic Distortion 20Hz 20kHz 95dB SPL Crossover Frequencies 80Hz Dimensions 20 x 9 1 ...

Страница 28: ...Frequency Width Frequency Width 24 PRELUDE MTS ...

Страница 29: ...25 PRELUDE MTS Frequency Width Frequency Width ...

Страница 30: ...Frequency Width Frequency Width 26 PRELUDE MTS ...

Страница 31: ...27 PRELUDE MTS NOTES NOTES ...

Страница 32: ...itysystems com 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 Infinity is a registered trademark of Infinity Systems Inc Printed in USA 1 00 Part No 335060 001 ...

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