User manual MCINTOSH MC752

[. . . ] A grounding type plug has two blades and a 2 IMPORTANT! INSTRUCTIONS FOR REMOVAL OF FOAM INSERT OVER THE VACUUM TUBES PRIOR TO CONNECTING THE A. C. POWER SUPPLY CORD, START ON THE NEXT PAGE. 3 Unpacking the MC7522 Caution: To prevent damage to the MC7522 Tubes during shipping, there is a special foam insert surrounding the Tubes of the Power Amplifier. user serviceable parts, including the tubes. If repairs are needed they must be performed by an authorized McIntosh Service Agency. The Foam Insert must be removed from the MC7522 before connecting the AC Power Supply Cord to the power amplifier. Failure to do so has the potential of a Fire Hazard, resulting in damage to the MC7522 and the surrounding environment. [. . . ] You now have "The Best. " The McIntosh dedication to "Quality, " is assurance that you will receive many years of musical enjoyment from this unit. We want you to be as familiar as possible with all the features and functions of your new McIntosh. Customer Service If it is determined that your McIntosh product is in need of repair, you can return it to your Dealer. For assistance 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 General Information 1. The following Connecting Cable is available from the McIntosh Parts Department: Power Control Cable Part No. 170-202 Six foot, 2 conductor shielded, with two 1/8 inch stereo mini phone plugs. 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: ________________________________ 2. For additional connection information, refer to the owner's manual(s) for any component(s) connected to the MC7522. The MC7522 mutes the speaker output for approximately fifteen seconds when first turned on. For the best performance and safety it is important to always match the impedance of the loudspeaker to the Power Amplifier connections. Refer to step 5 on page 10. Table of Contents Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Unpacking the MC7522 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5 Thank You and Please Take a Moment . . . . . . . . . . . . . . . . . . . . . . . 6 Technical Assistance and Customer Service . . . . . . . . . . . . . . 6 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Connector Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Performance Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Left Side Panel Connections, Right Side Panel Connections and Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 How to Connect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170-202 Six foot, shielded 2 conductor, with 1/8 inch stereo mini phone plugs on each end. Introduction Now you can take advantage of traditional McIntosh standards of excellence in the MC7522 Tube Power Amplifier. The 75 watt power output will drive any high quality Loudspeaker System. The MC7522 reproduction is sonically transparent and absolutely accurate. The McIntosh Sound is "The Sound of the Music Itself. " 7 Dimensions Dimensions The following dimensions can assist in determining the best location for your MC7522. Front View of the MC7522 41. 91cm Left Side View of the MC7522 16-1/2" 1-3/4" 7-7/8" 20. 00cm 4. 45cm 8-1/2" 21. 59cm 1-1/4" Top View of the MC7522 1-3/4" 4. 45cm 3. 18cm Right Side View of the MC7522 3-13/16" 9. 68cm 13-5/8" 34. 61cm 4-1/2" 8-1/2" 21. 59cm 11. 43cm 8 Left Side Connections, Right Side Connections and Fuse Holder OUTPUT Connections for a 2, 4 or 8 ohm Loudspeaker POWER CONTROL IN receives a turn On/Off signal from a McIntosh component POWER CONTROL OUT sends a turn On/Off signal to the next McIntosh Component UNBALANCED INPUT for an audio cable from a Preamplifier or A/V Control Center audio output UNBALANCED INput2 / OUTput for an audio cable from a Preamplifier output or to connect an audio cable on to the next Power Amplifier input Connect the MC7522 power cord to a live AC outlet. Connect the Loudspeaker hookup cables from a single Loudspeaker to the MC7522 Negative Output Terminal identified as COMmon and Positive Output Terminal indentified as 2 (ohms), 4 (ohms) or 8 (ohms) connection that matches the impedance of the Loudspeaker, being careful to observe the correct polarities. If the Loudspeaker's impedance is in-between the available connections, use the nearest lower impedance connection. Refer to "General Information" Note 4 on page 6 for additional information. WARNING: Loudspeaker terminals are hazardous live and present a risk of electric shock. Loudspeaker When connecting Loudspeakers to the MC7522 it is very important to use cables of adequate size, so there is little to no power loss in the cables. The smaller the Gauge number, the larger the wire size: Loudspeaker Cable Distance vs Wire Gauge Guide Loudspeaker Impedance 2 Ohms 4 Ohms 8 Ohms 25 feet (7. 62 meters) or less 50 feet (15. 24 meters) or less 100 feet (30. 48 meters) or less 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 so the wires cannot slip out. Banana plug connection: Insert the banana plug into the hole at the top of the terminal. Refer to figures A and B. Note: Banana Plugs are for use in the United States and Canada only. 6. Connect the MC7522 Power Cord to a live AC outlet. 12AWG 14AWG 16AWG 10AWG 12AWG 14AWG 8AWG 10AWG 12AWG 3. [. . . ] As a result, the nominal impedance rating of the Loudspeaker (usually measured at a midrange frequency) might not always agree with the impedance of the Loudspeaker at low frequencies where the greatest amount of power is required. Contact the Loudspeaker Manufacturer for additional information about the actual impedance of the Loudspeaker before connecting it to the McIntosh MC7522. Input Mode Switch The Input Mode Switch, which is located on the Left Side Panel of the MC7522, allows you to select either the BAL (Balanced) or UNBAL (Unbalanced) Input. Refer to figure 8. Figure 8 Input Sensitivity Switch The Input Sensitivity Switch, which is located on the Left Side Panel of the MC7522, allows matching the Preamplifier or A/V Control Center output voltage capability so the MC7522 Power Amplifier can be driven to Figure 9 full power output. With the MC7522 is connected to most McIntosh Preamplifiers or A/V Control Centers the correct setting of the Input Sensitivity Switch would be the 1. 7V position. [. . . ]