User manual MARANTZ MA-9S1

[. . . ] Model MA-9S1 User Guide Monaural Power Amplifier CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK) NO USER-SERVICEABLE PARTS ARE INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS PRODUCT TO RAIN OR MOISTURE. CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH THE WIDE BLADE OF THE PLUG TO THE WIDE SLOT, AND FULLY INSERT. IMPORTANT SAFETY INSTRUCTIONS READ BEFORE OPERATING EQUIPMENT This product was designed and manufactured to meet strict quality and safety standards. There are, however, some installation and operation precautions which you should be particularly aware of. Read Instructions ­ All the safety and operating instructions should be read before the product is operated. [. . . ] And please use a speaker system whose impedance is for 4 - 16. If impedance is lower than 4, protection circuit will be engaged during play. This will result in no output of the Amplifier. Turn counter-clockwise to loosen. Turn clockwise to tighten. Connection 2 Stereo Bi-Amp connection. q Polarity of Speaker output terminal Speaker terminals have positive (+ : Red) and negative (­ : White) polarity and speaker wires also have (+ & ­) polarity. In wiring, be sure to connect the terminals with the same polarity (+ and +, ­ and ­). s Wiring the speaker CAUTION: When connecting two pairs of speaker systems simultaneously, the impedance of each speaker system should be no less than 8 ohm . Connecting a speaker system with a lower impedance than 8 ohm may activate the protection circuitry and make normal stereo reproduction impossible. Turn counter-clockwise to loosen. Insert conductor. Turn clockwise to tighten. 5 4. Connections Connection 2 Stereo Bi-Amp connection. (Make sure your speakers are designed for Bi Amp capabilities) 6 4. Connections Enhance connection 1 to Bi-Amp connection, and drive the bass speaker and Mid / High Frequency speakers with separate power Amplifiers. s Bi-Amp (connection) The benefits of Bi-Wiring; drive the bass speaker and Mid / High speakers with separate power Amplifiers. Bi-Amping will lessen the burden of Power Amp impedance, so that back electromotive force between the Low and Mid/High signal can be lessened. We can expect drastic improvement of sound quality. Caution : In the event of this connection (Control Amp SC-7S1 is <Stereo>mode), SC-7S1 and MA-9S1 can be wired by Unbalanced only. s Wiring the speaker system q q q Please remove short bar of the speaker terminal. If the short bar, has not been removed, it will damage the power amplifier. Please use speaker systems whose impedance are for 4 16. If impedance is lower than 4, the protection circuit will be engaged during play. Make sure your speakers are designed for Bi Amp capabilities. If they don't the protection circuit will be engaged and there will be no output. Or it will damage the power amplifier. 7 4. Connections Connection 3 Stereo complete Bi-Amp connection. (Make sure your speakers are designed for Bi Amp capabilities) As shown by connection 3 or 4, the control Amp SC-7S1 can be controlled through sets by wiring with the equipped remote control. 8 4. Connections This connection can have options i. e. You may connect the units using either balanced or unbalanced cables. But, you have to use the same cables per SC 7S1. s Complete Bi-Amp Connection Enhance connection 2, by having one more control Amp. [. . . ] At the same time, the meter lights turn ON. q Repairs Only the most competent and qualified service technicians should be allowed to service your unit. The factory-trained warranty station personnel have the knowledge and special facilities needed for repair and calibrate this precision equipment. After the warranty period has expired, repairs will be performed for a charge. In the event of difficulty, refer to your dealer or write directly to the nearest location to you that is listed on the Marantz Authorized Service Station list. [. . . ]