User manual MCINTOSH XCS1K

[. . . ] Loudspeaker System XCS1K Owner's Manual McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York 13903-2699 Phone: 607-723-3512 FAX: 607-724-0549 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. [. . . ] Since the audio power fed to each row is distributed among all the drivers, each driver does not have to work as hard, resulting in greater power handling capability, greatly reduced power compression and a dramatic reduction in Figure 2A distortion. Analysis and testing resulted in a design concept which utilizes a pair of aluminum shorting sleeves in the magnetic circuit. The sleeves virtually 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. Additional benefits are Figure 3 less 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 previous designs. A good example of this low distortion is incredible smoothness Figure 4 and clarity in the reproduction of the human voice. The Crossover Networks used in the XCS1K Loudspeaker System are phase matched between the Low Frequency, Figure 5 Midrange and High Frequency Sections to ensure a smooth frequency response over the entire audible range. The crossover inductors are selected so they will not add audible distortion. The network capacitors are film type for extra reliability. All the Capacitors and Inductors are chosen for high current capacity. Each section of the network utilizes its own self resetting high current PPTC type fuses to provide an extra measure of protection. Figure 2B 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. The Woofer also incorporates McIntosh's Patented LD/HP1 Magnetic Circuit Design. 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 32 two inch Midranges and 20 three-quarter inch Dome Tweeters all use this Alloy. The NeodymiumIron-Boron Alloy has the highest flux density per unit of volume. The smaller overall size of the Midrange and Tweeter Loudspeakers allows for closer spacing and results in improved sound reproduction. · Low Harmonic and Intermodulation Distortion The XCS1K Loudspeaker System is capable of reproducing the full dynamic range of a symphony orchestra with very low audible distortion of any kind. · High Power Handling The Loudspeaker Elements and Crossover Components of the XCS1K are all chosen for use with powerful amplifiers up to 1, 200 watts. [. . . ] Remove the metal jumper between the Loudspeaker LOW Frequency 8 (+) Binding Post and MID Frequency 8 (+) Binding Post. Connect a Loudspeaker cable from the XCS1K LOW Frequency COM (-) Binding Post to the (-) Binding Post of the Power Amplifier number one. 5. Connect a Loudspeaker cable from the XCS1K LOW Frequency 8 (+) Binding Post to the (8 ohm) Binding 10 Notes: 1. It is important to maintain the correct polarity at both ends of the Loudspeaker cables. [. . . ]