McIntosh XRT28 User's Manual
Contents
1. How to Connect using a single Amplifier 1 Connect a Loudspeaker cable from the Negative Binding Post of the Amplifier to the XRT28 Loud speaker System LOW COMmon Binding Post 2 Connect a Loudspeaker cable from the Positive Binding Post of the Amplifier to the XRT28 Loud speaker System LOW 40 Binding Post Note For full audible range operation jumpers must be in place between the MID and HIGH COMmon Binding Posts the MID and HIGH 4Q Binding Posts the MID and LOW COMmon Binding Posts and the MID and LOW 4Q Binding Posts 3 Tighten all of the Loudspeaker and Amplifier Binding Posts 10 How to Connect using a single Amplifier McIntosh xrras LOUDSPEAKER SYSTEM 11 Melntosh How to Prepare Hookup Cables p coc aH a a CELER Il The McIntosh XRT28 Loudspeaker System utilizes bind ing posts for speaker wire connections Prepare the Loud speaker Hookup Cables that attach to the Power Amplifier Output Terminals Bare wire cable ends Carefully remove sufficient insulation from the cable ends refer to figures 19 20 amp 21 If the cable is stranded carefully twist the strands together as tightly as possible Note If desired the twisted 0 5 inches 12 7mm ends can be tinned with solder to Figure 19 Figure 20 Figure 21 keep the strands together and or attach a s2. Loudspeaker System XRT28 Owner s Manual McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 FAX 607 724 0549 Melntosh WARNING TO REDUCE RISK OF NO USER SERVICEABLE PARTS FIRE OR ELECTRICAL SHOCK DO INSIDE REFER SERVICING TO NOT EXPOSE THIS EQUIPMENT TO QUALIFIED PERSONNEL RAIN OR MOISTURE IMPORTANT SAFETY INSTRUCTIONS PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT 1 Read these instructions 12 Disconnect this apparatus during lightning storms 2 Keep these instructions or when unused for long periods of time 3 Heed all warnings 13 Refer all servicing to qualified service personnel 4 Follow all instructions Servicing 1s required when the apparatus has 5 Do not use this apparatus near water been damaged in any way liquid has been spilled 6 Clean only with a dry cloth or objects have fallen onto the apparatus the 7 Warning To reduce risk of fire or electrical shock apparatus has been exposed to rain or moisture do not expose this equipment to rain or moisture does not operate normally or has been dropped This unit is capable of producing high sound pres 14 Do not expose this equipment to dripping or sure levels Continued exposure to high sound splashing and ensure that no objects filled with pressure levels can cause permanent hearing im liquids such as vases are placed on the pairment or loss User caution is advised and ear equipment protecti
3. Dealer who is familiar with your McIntosh equipment and any other brands that may be part of your system If you or your Dealer wish ad ditional help concerning a suspected problem you can re ceive technical assistance for all McIntosh products at McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 Phone 607 723 1545 Fax 607 723 3636 Customer Service If it is determined that your McIntosh product is in need of repair you can return it to your Dealer You can also return it to the McIntosh Laboratory Service Department For as sistance on factory repair return procedure contact the McIntosh Service Department at McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 Phone 607 723 3515 Fax 607 723 1917 Copyright 2003 by McIntosh Laboratory Inc Table of Contents SAL LS PAS ire nee 2 Thank You and Please Take a Moment 3 Technical Assistance and Customer Service 3 Table of Contents and Important Information 3 Intt OO C OTI ea ee MEER Dx ERE ULIS 4 Performance Features 5 6 Installation using the Column Base 8 How to Connect using a single amplifier 10 How to Connect using two amplifiers 12 How to Connect using three am
4. the Binding Posts and retain them for possible future use 2 Connect a Loudspeaker cable from the Negative Binding Post of the Amplifier Number One to the XRT28 Loudspeaker System LOW COMmon Bind ing Post 3 Connect a Loudspeaker cable from the Positive Binding Post of the Amplifier Number One to the XRT28 Loudspeaker System LOW 4 Binding Post 4 Connect a Loudspeaker cable from the Negative Binding Post of the Amplifier Number Two to the XRT28 Loudspeaker System MID COMmon Bind ing Post 5 Connect a Loudspeaker cable from the Positive 4 Binding Post of the Amplifier Number Two to the XRT28 Loudspeaker System MID 4Q Binding Post 6 Connect a Loudspeaker cable from the Negative Binding Post of the Amplifier Number Three to the XRT28 Loudspeaker System HIGH COMmon Bind ing Post 14 7 Connect a Loudspeaker cable from the Positive Binding Post of the Amplifier Number Three to the XRT28 Loudspeaker System HIGH 49 Binding Post 8 Tighten all of the Loudspeaker and Amplifier Binding Posts McIntosh Single Channel Amplifier Number Three McIntosh Single Channel Amplifier Number Two McIntosh Single Channel Amplifier Number One How to Connect using three Amplifiers Mtintosh xates LOUDSPEAKER SYSTEM i 1 T 1 15 Melntosh Notes Melntosh Specifications Specifications System Driver Complement Two 10 inch LD HP Woofers with magnetic shi
5. ton Refer to figure 10 Figure 9 _ Glass Panel material UP UP Se Figure 10 9 Proceed to step number 10 for installation using the Column Base Installation using the Column Base Unpacking the Column Base 10 Lift and remove the bubble wrap packing material from the base 11 Locate and remove the bag of hardware and Allen Wrench Tool taped to the bottom of the base Assembling the High Frequency Column 12 Using the supplied Allen Wrench remove two screws from each side of the Column Bottom Re fer to figure 11 13 Orient the Column Base with the Decal Arrow pointing to LOUDSPEAKER ward the front of the McIntosh Loudspeaker Column Refer to figure 12 Figure 11 14 Attach the Column Base to the Loudspeaker Column using the four supplied machine bolts and washers Refer to figure 13 15 Orient the Loudspeaker Grille with the extended wood trim pointed towards the Column Base and line it up even with the top sides of the Column Align the Grille fastening pins to the Column Grommets there are six pins on each side Carefully push down to secure the Grille to the Column Refer to figure 14 Figure 12 Packing material Glass 9 gt E Figure 13 Installation Fastening Pin Gromment Figure 14 Optional Feet 16 Two sets of optional feet eight Tiptoes and eight Glides are supplied with the XRT28 Loudspeaker System Re
6. 151 943 lindrical Wave Front and the Loudspeaker on the right side produces a conventional Spherical Wave Front Refer to figure 2 The Low Frequency Section of the System consists of two 10 inch Woofers They have a large magnet assembly and long cone excursions with very low levels of harmonic distortion and frequency response down to 16Hz Refer to figure 3 The Woofer also in corporates McIntosh s Pat ented LD HP Magnetic Cir cuit Design with shielding to greatly reduce any external magnetic field that could dis tort the video image on a TV Monitor placed next to the XRT28 Loudspeaker Exten sive investigating and testing resulted in a new design con cept which utilizes a pair of aluminum shorting sleeves in the magnetic circuit Refer to figure 4 The sleeves virtu ally eliminate the negative influence of the fluctuating voice coil field on the permanent magnet field This results in lower distortion due to more linear magnetic flux in the voice coil gap Re fer to figure 5 Ad ditional benefits are less volume com pression due to im proved heat transfer through the sleeves and a cooler operat ing voice coil Both measurements as well as critical lis tening reveal ten times less distortion than previous de signs A good example of this low distortion is incredible smoothness and clarity in the reproduction of the human voice The Crossover Network used in the XRT28 Loud speaker System is design
7. c Circuit Design This design when compared to conventional Loudspeaker Elements reduces distortion significantly It also increases power handling and efficiency Neodymium Iron Boron Alloy Magnets The 20 four inch Midranges and 16 one inch Dome Tweet ers all use this Alloy The Neodymium Iron Boron Alloy has the highest flux density per unit of volume and helps to keep the Column weight to a minimum e Shielded Magnetic Field The XRT28 may be used in Home Theater Installations near a television receiver or monitor without causing the television image to degrade McIntosh has designed special shielding around the magnetic structure of the XRT28 Loudspeaker Elements to prevent interference e High Power Handling The Loudspeaker Elements and Crossover Components of the XRT28 are all chosen for use with powerful amplifiers up to 1 200 watts e Superior Imaging Locating the Column of Tweeters between the two Columns of Midranges helps to generate a symmetrical horizontal polar response for superior imaging e Versatile Operation and Placement In additional to the regular connections the XRT28 Loud speaker System provides separate connections for Bi Am plification and Tri Amplification hookups Gold Plated Input Connectors The 28 input connectors are gold plated for superior corrosion resistance and high electrical conductivity Melntosh XRT28 Dimensions The following dimensions can assist in determini
8. continuous bass setting up the speak ers and listening to them from the main listening spot Move the Loudspeakers to an alternate location and repeat the listening paying attention to how the bass qualities and response levels change Do not assume the loudest bass is best rather listen for booming a lack of articulation as well as a balance over the whole spectrum to assure the bass will not drown out the other parts of the music Ex periment with various Loudspeaker positions until the lo cation that sound best is found The XRT28 Column s Smooth Frequency Re sponse may be altered by large object s located in sound waves path or by locating the column too close to a side wall There should be an unob structed area in front of the column of at least 30 degrees either side from the center axis for the best performance Refer to figure 16 Figure 16 Locating Loudspeakers for use in Home Theater In a Home Theater application the placement of Left and Right Front Loudspeakers can be limited by such considerations as the size and location of the video monitor The locating an Lit en suggestions in the for EH use in a Music System section below can still be helpful as a starting place Refer to figure 17 LEFT FRONT RIGHT FRONT LEFT REAR SURROUND RIGHT REAR SURROUND Figure 17 Locating Loudspeakers for use in a M
9. d in a small carton I9 McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice Printed in the U S A McIntosh Part No 04086401
10. eaker System MID 40 Binding Post 6 Tighten all of the Loudspeaker and Amplifier Binding Posts McIntosh Single Channel Amplifier Number Two McIntosh Single Channel Amplifier Number One How to Connect using two Amplifiers m NENNEN Wtinfosh xnree LOUDSPEAKER SYSTEM 13 Melntosh How to Prepare Hookup Cables The McIntosh XRT28 Loudspeaker System utilizes bind ing posts for speaker wire connections Prepare the Loud speaker Hookup Cables that attach to the Power Amplifier Output Terminals Bare wire cable ends Carefully remove sufficient insulation from the cable ends refer to figures 19 20 amp 21 If the cable is stranded carefully twist the strands together as tightly as possible Note If desired the twisted 0 5 inches 12 7mm ends can be tinned with solder to Figure 19 Figure 20 Figure 21 keep the strands together and or attach a spade lug Spade lug or prepared wire connection Insert the spade lug connector or prepared section of the cable end into the terminal side access hole and tighten the terminal cap until the cable is firmly clamped into the terminal iil so the wires Figure 22 Figure 23 Figure 24 cannot slip out Refer to figures 22 23 amp 24 How to Connect using three Amplifiers 1 Remove all the jumpers between
11. ed to ensure an even frequency LD HP ae Conventional Figure 4 Without LD HP With LDHP Distortion Sf sss hi Frequency Figure 5 PR 1 A iT ge Figure 6 Introduction and Performance Features response over the entire audible range The Network uti lizes both Second and Third Order design utilizing Capac tors and Inductors with high current capacity Refer to fig ure 6 There are two different types of low loss DCR In ductors in the network each one chosen not to exhibit any core saturation even at high power levels This prevents the addition of distortion to the music at any frequency The Capacitors used include low loss ESR Polypropy lene and Mylar types The Network also utilize self reset ting high current Poly Switches to provide an extra mea sure of protection The enclo sures are an im portant part of the XRT28 Loud speaker System The Loudspeaker System utilizes a massive extruded aluminum enclosure that houses the 20 four inch Midrange and 16 one inch Tweeter Drivers Refer to figure 7 It also has multiple front to back internal braces to form a damp ened rigid Column Structure The Column s small foot print allows for a variety of different placements in a room Figure 7 Performance Features Patented LD HP Technology The McIntosh Low Frequency and Midrange Loudspeaker Elements feature the patented LD HP Magneti
12. elding Twenty 4 inch LD HP Midranges with magnetic shielding Sixteen 1 inch Soft Dome Tweeters with magnetic shielding Impedance 4 ohms Nominal Frequency Response 16Hz 20kHz Sensitivity 88dB 2 8V 1m Crossover Frequencies 300Hz 2 000Hz Power Handling 1200 Watts Maximum Overall Dimensions 77 1 8 inches 195 90cm Height 16 3 8 inches 41 59cm Width 16 3 8 inches 41 59cm Depth Finish Black Ash Natural Cherry Red Cherry Weight Loudspeaker Column 124 pounds 56 25kg net 146 5 pounds 66 6kg in shipping carton Column Base 15 5 pounds 7 03kg net 18 pounds 8 16kg in shipping carton LD HP Pat No 5 151 943 18 Packing Instructions pu M akku Packing Instructions In the event it is necessary to repack the equipment for Quantity Part Number Description shipment the equipment must be packed exactly as re 1 034242 Top shipping carton ceived Failure to do so will result in shipping damage 1 034243 Bottom shipping carton Use the original shipping carton and interior parts only 2 034244 Foam end cap if they are in good serviceable condition If a shipping car 3 034245 Foam center cap ton or any of the interior part s are needed please call or write Customer Service Department of McIntosh Labora tory Note The Loudspeaker System Base is wrapped in bubble pack and place
13. fer to figure 15 To prevent crushing carpet use the Tiptoe Spikes to protect non carpeted flooring use the Chrome Glides Both the N Glides and Tiptoes have a rm threaded shaft and locking nut Glides that screw into the tapped holes in the bottom of the XRT28 s base rails The feet can be independently ad justed to compensate for uneven flooring 17 Stand the Column upright Tiptoes Figure 15 Room Placement using the Column on a Base Loudspeaker placement in a room can greatly affect performance The XRT28 Loudspeaker is designed for both Music and Home Theater Systems The optimal method for selecting speaker locations includes the use of a real time spectrum analyzer operated by an experienced system installer An uncompromising installation would take into consideration the floor wall and ceiling coverings the type and placement of furniture and can even include the architectural design of the room and its construction materials In those instances where placement in the room is fixed an enviromental equalizer may be needed to restore proper musical balance Placement near a wall corner floor ceiling or any in tersecting surfaces will reinforce or diminish some bass frequencies The bass frequencies that are altered by place ment in a particular location is dependant on the dimen sions of the room If professional measurement equipment is not available test the various Loudspeaker locations by playing music with
14. he volume level is reduced significantly and kept low until the output of the affected Loudspeaker Element returns to normal 4 When the XRT28 Loudspeaker System is driven by more than one amplifier the output levels of the different amplifiers connected to the Loudspeaker System must be adjusted to achieve a proper balance between the low midrange and high frequencies reproduced This adjustment is best achieved through the use of audio test equipment operated by a qualified installer Melntosh Introduction McIntosh Acoustic Engineers have refined the line source Column Loudspeaker System concept to provide superior sound reproduction in a full range system The Loudspeaker System utilizes a patented Column Design with multiple four inch Midrange LD HP Mag netic Circuit Design Driv ers and one inch soft dome Tweet ers Refer to figure 1 Since the audio power fed to a column is distrib uted among all the drivers each driver does not have to work as hard resulting in greater power handling capabil ity and a dramatic reduction in distortion The Sound Waves from the Column produce a Cylindrical Wave Front with a stable sym metrical horizontal sound dis persion to minimize undesirable floor and ceiling reflec tions that could detract from a stable sound image In the illustration the Loudspeaker on the left side produces a Cy Figure 1 Figure 2 Figure 3 COLUMN Pat No 4 267 405 LD HP Pat No 5
15. ion and operation install the XRT28 Loudspeaker System and any associated audio equipment Unpacking the Loudspeaker System 1 Remove the banding material from the shipping carton Refer to figure 8 2 Lift off the top of the shipping carton and set it aside 3 Lift up on the rear of the Loudspeaker near the foam packing ma terial at both ends Place the entire assembly Loudspeaker Loudspeaker Grille and foam packing material next to the bottom shipping carton on a flat surface Refer to figure 9 4 Release the Loud speaker Grille from the packing material by Cut and remove bands Figure 8 Lift up here opening the slit in the 44 2 packing material lo Se _ cated on the top center i Remove the Loud s epa speaker Grille from the protective shipping wrap and set it aside 5 Ina similar manner lift out the Loudspeaker and set it aside 6 Replace the shipping carton top onto the shipping car ton bottom Take the two pieces of the just removed packing material and lay it down flat onto the top of the shipping carton 7 Carefully remove the protective shipping bag s from the Loudspeaker Column so as not to mar the Column Finish or damage the Loudspeaker Drivers 8 Place the Loudspeaker Column on top of the packing material located on top of the shipping carton making sure to align the Louspeaker Column Bottom End the Glass Name Plate end to the end of the shipping car
16. ng the best location for your XRT28 Loudspeaker System Front View of the Side View of the Rear View of the XRT28 XRT28 XRT28 Loudspeaker System Loudspeaker System Loudspeaker System 4 1 2 11 43cm 5 3 8 13 65cm 1 1 8 195 90cm 3 3 4 9 53cm 31 3 4 80 65cm 28 3 15 16 71 12cm 10 00cm 24 1 3 4 60 96cm 4 45cm 20 50 8cm 5 3 8 1 6 3 3 5 3 4 13 65cm 5 7 3 41 59cm 14 61cm 14 92cm 16 38 _ i 41 8 3 16 20 80 w 0 9 1 6 26 83cm Front View of the XRT28 Loudspeaker System 9 5 8 24 45cm 6 1 2 16 51 3 3 8 8 57cm 4 1 2 11 43cm 2 3 4 6 99cm 32 7 16 33 1 4 82 39cm 84 46cm 11 15 16 23 7 8 30 32cm 60 64cm Y 4 b End View and Base of the XRT28 Loudspeaker System 13 1 16 iQ 33 18cm 9 20 32cm 9 3 16 23 34cm 1 3 8 3 49cm 13 1 8 33 34cm 9 22 86cm Dimensions 7 8 2 22cm 16 3 8 41 59 Melntosh Introduction to Installation The XRT28 Loudspeaker System weight is 139 5 pounds 63 4kg net It requires two or more persons to safel handle during the assembly and placement The XRT28 15 supplied with a McIntosh Column Base Follow the in structions below for unpacking the Loudspeaker System and attaching the Column Base It is recommended that the Professionals at your McIn tosh Dealer who are skilled in all aspects of installat
17. on is recommended when playing at high volumes 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Protect the connection cables from being walked on or pinched particularly at the point where they exit from the apparatus 10 Only use attachments accessories specified by the manufacturer 11 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over O Thank You Your decision to own this McIntosh XRT28 Loudspeaker System ranks you at the very top among discriminating music listeners You now have The Best The McIntosh dedication to Quality is assurance that you will receive many years of musical enjoyment from this unit Please take a short time to read the information in this manual We want you to be as familiar as possible with all the features and functions of your new McIntosh Please Take A Moment The serial number purchase date and McIntosh Dealer name are important to you for possible insurance claim or future service The spaces below have been provided for you to record that information Serial Number Purchase Date Dealer Name Technical Assistance If at any time you have questions about your McIntosh product contact your McIntosh
18. pade lug Spade lug or prepared wire connection Insert the spade lug connector or prepared section of the cable end into the terminal side access hole and tighten the terminal cap until the cable is firmly clamped into the terminal T so the E Wires Figure 22 Figure 23 cannot slip out Refer to figures 22 23 amp 24 Figure 24 How to Connect using two Amplifiers l 12 Remove jumpers between the MID and LOW COMmon Binding Posts and the MID and LOW 49 Binding Posts The removed jumpers should be re tained for possible future use Note For Midrange and High Frequency operation jumpers must be in place between the MID and HIGH COMmon Binding Posts and the MID and HIGH 4Q Binding Posts Connect a Loudspeaker cable from the Negative Binding Post of the Amplifier Number One to the XRT28 Loudspeaker System LOW COMmon Bind ing Post Connect a Loudspeaker cable from the Positive Binding Post of the Amplifier Number One to the XRT28 Loudspeaker System LOW 40 Binding Post Connect a Loudspeaker cable from the Negative Binding Post of the Amplifier Number Two to the XRT28 Loudspeaker System MID COMmon Bind ing Post 5 Connect a Loudspeaker cable from the Positive Binding Post of the Amplifier Number Two to the XRT28 Loudsp
19. plifiers 14 SCCM 18 Pack mo TS RUC TON 19 Important Information Caution The XRT28 Loudspeaker System weight is 139 5 pounds 63 4kg It requires two or more persons to safely handle when moving 1 Loudspeaker Cables of adequate size are important to ensure that there will be no significant power loss or heating Cable size is specified in Gauge numbers or AWG American Wire Gauge The smaller the Gauge number the larger the wire size If the Loudspeaker Cables are 25 feet 7 62m or less use at least 18 Gauge AWG wire size or larger If the Loudspeaker Cables are 50 feet 38 1 or less use at least 14 Gauge AWG wire size or larger If the Loudspeaker Cables are 100 feet 76 2m or less use at least 12 Gauge AWG wire size or larger The Loudspeaker Connection Terminals can accept up to 12 Gauge AWG wire 2 For additional connection information refer to the owner s manual s for any component s connected to the XRT28 Loudspeaker 3 The XRT26 s built in speaker protection incorporates five automatic resetting solid state devices in the crossover network One protects the tweeters one for the midranges and three for the woofers The protection allows a certain amount of overdrive but extended periods will trigger protection If an obvious lack of high mid or low frequencies is noticed the Protection Device may have activated These devices will automatically reset when t
20. usic System When used in a Music System the distance between the Loudspeakers and the listener to the Loudspeakers should form an equilaterial or acute isosceles triangle If the speakers are too far apart relative to the listener some imaging can be lost Refer to figure 18 LEFT FRONT RIGHT FRONT BETWEEN SPEAKER DISTANCE LISTENER TO LISTENER TO SPEAKER SPEAKER DISTANCE DISTANCE Figure 18 Melntosh How to Prepare Hookup Cables The McIntosh XRT28 Loudspeaker System utilizes bind ing posts for speaker wire connections Prepare the Loud speaker Hookup Cables that attach to the Power Amplifier Output Terminals Bare wire cable ends Carefully remove sufficient insulation from the cable ends refer to figures 19 20 amp 21 If the cable is stranded carefully twist the strands together as tightly as possible McIntosh Single Channel Amplifier Note If desired the twisted 0 5 inches 12 7mm ends can be tinned with solder to Figure 19 Figure 20 Figure 21 keep the strands together and or attach a spade lug Spade lug or prepared wire connection Insert the spade lug connector or prepared section of the cable end into the terminal side access hole and tighten the terminal cap until the cable is firmly clamped into the terminal iil so the wires Figure 22 Figure 23 Figure 24 cannot slip out Refer to figures 22 23 amp 24
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