User manual MCINTOSH XR200 3-WAY LOUDSPEAKER

[. . . ] Loudspeaker System XR200 Owner's Manual McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 www. mcintoshlabs. com WARNING - TO REDUCE RISK OF FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. To prevent the risk of electric shock, do not remove cover or back. No user-serviceable parts inside. IMPORTANT SAFETY INSTRUCTIONS! PLEASE READ THEM BEFORE OPERATING THIS EQUIPMENT. 1. Clean only with a non-abrasive dry soft cloth. [. . . ] The Low Frequency Section of the System consists of three newly designed eight inch Woofers. They have a large magnet assembly and long cone excursions with very low levels of harmonic distortion and frequency response down to 20Hz. The three Woofers incorporate McIntosh's Patented LD/ HP® 1 Magnetic Circuit Design. Finite Element Analysis and testing resulted in a design concept which utilizes a pair of aluminum shorting sleeves in the magnetic circuit. The sleeves LD/HP greatly reduce the negative Conventional 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. Additional benefits are less Figure 4 volume compression due to improved heat transfer through the sleeves and a cooler operating voice coil. Both measurements, as well as critical listening, reveal ten times less distortion than Figure 5 previous designs. 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 XR200 Loudspeaker System is designed to ensure an even frequency response over the entire audible range. The Third Order Designed Network utilizes Capacitors and Inductors with high current capacity. There are two different types of low loss (DCR) Inductors 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 are the low loss (ESR) types. The Network also utilizes self resetting high current PTC Fuses to provide an extra measure of protection. The enclosure is an important part of the XR200 Loudspeaker System. It has multiple front to back and side to side internal braces to form a dampened rigid Loudspeaker enclosure. The Loudspeaker's small footprint allows for a variety of different placements in a room. Figure 3 1 LD/HP Pat. No 5, 151, 943 4 Introduction and Performance Features Performance Features · Patented LD/HP® Technology The McIntosh Low Frequency Loudspeaker Elements feature the patented LD/HP Magnetic 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 12 two inch Midranges and 7 three-quarter inch Dome Tweeters all use this Alloy. [. . . ] Remove the metal jumper between the Loudspeaker LOW Frequency COM (-) Binding Post and MID Frequency COM (-) Binding Post. Remove the metal jumper between the Loudspeaker LOW Frequency 8 (+) Binding Post and MID Frequency 8 (+) Binding Post. Connect a Loudspeaker cable from the XR200 LOW Frequency COM Binding Post to the COM (-) Binding Post of the Power Amplifier number One. Notes: 1. It is important to maintain the correct polarity at both ends of the Loudspeaker cables. [. . . ]