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. [. . . ] All Connections are based on speaker systems that are capable of Bi-Wiring. Name and Function P12 s Bi-Wiring The method is to improve sound quality, by connecting speaker cable respectively to each terminal for Bass and Mid/High speakers. This method will reduce interference caused by the bass speaker and the Mid/High speaker unit being powered by the same amplifier. q q Be careful not to short circuit or touch the speaker cables to each other. Peel off the coating or insulation of the speaker cable as shown below. 1 cm Cut the coating or insulation Peel off the edge of the cable. Twist conductors. s Wiring the speaker system q Speaker system doesn't comply with the Bi-Wiring Please connect either of the speaker terminals 1 or 2. If impedance is lower than 4, the protection circuit will be engaged during play. This will result in no output of the Amplifier. of the speaker cable. q Wiring with "Y" style terminal q Speaker system complies with the Bi-Wiring Please connect both of the speaker terminals 1 and 2. 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. (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. If impedance is lower than 4, the protection circuit will be engaged during play. If they don't the protection circuit will be engaged and there will be no output. (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. 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. This is a Complete Bi-Amp connection which separates Mid / High signal and Low signal from the Pre-Amp section. s Balanced terminal The balanced output connector uses a XLR connector. [. . . ] Is the connection cable properly connected to the control (pre) amplifier?Shut power OFF, wait 1 minute or more, then reactivate the power. s About the Protective Circuit This unit incorporates a protective circuit that protects the amplifier circuit and speaker system against damage. If the protective circuit works, the meter lights shut off and the sound is muted. (Pressing the METER OFF switch also shuts off the meter lights. ) This protective circuit works in the following cases. q At power ON When power is activated, the protective circuit works and mutes the sound for about 8 seconds until the amplifier circuit stabilizes. [. . . ]