User manual VINCENT SP-996

[. . . ] Please follow the security precautions, though some of those things may seem obvious. In the appendix to this manual you will find a glossary explaining some established technical terms. If there are open questions your audio specialist dealer will help you. He also represents your contact person in case of needed warranty service or repairs after the warranty period and is interested to hear from your experiences with Vincent products. [. . . ] RCA connections Make sure that you do not mix up the analogue inputs for right and left. The RCA plugs for these are mostly colour coded as follows: red for the right channel, black or white for the left channel. Contacting the middle pin of the RCA plugs with the outer ring of the RCA chassis jack may lead to damages to the main amplifier if it is switched on!To avoid this hazard, connect or disconnect only in switched-off state and more than one minute after deactivating!Speaker cable connections The use of ready-made loudspeaker cables is recommended instead of connecting the cable's central wire (strand) directly to the terminals. banana plugs or cable lugs ensure high security from short-circuits and damage to loudspeakers or amplifier. Ensure that bare loudspeaker wires are never able to come into contact with each other or with the metal on the back of the housing. Make sure that the positive and negative loudspeaker wires are connected correctly. You will notice a reduced sound quality if the connections are the wrong way round. If you use loudspeaker cable equipped with 4mm banana plugs you are required to remove the small plastic plugs located in the connector holes of the speaker clamps when first installing this main amplifier in your system. This Vincent preamplifier uses the European system following the standard AES14-1992. If the power control function is not desired, the switch signal cable must therefore be removed!The required voltage and frequency can be read on the back of the device beside the socket for the mains. If the electricity supply is appropriate, push the inlet connector of the supplied mains cable firmly into socket for the mains on the back of the device (8). Either a single pair of loudspeakers or two speaker pairs can be connected to the main amplifier SP-996. For each loudspeaker you will find two connector screws (positive + und negative ­) at the amplifier's backside. Each pair of screws has a label "R" or "L" nearby to clarify to which stereo channel it belongs. at the loudspeaker connection terminal there are similar connector screws or connectors. There, the polarity of each screw (+ or ­) can be identified as well and the other side of the speaker cable associated with this speaker must be attached. Make sure only connector screws of the same polarity will be connected by each speaker cable wire: a knob marked "+" in the amplifier's terminal must be connected with a speaker's connector screw marked "+" as well. If a second pair of loudspeakers is intended to be used, the connector screws of the lower row must be connected in a similar fashion to the additional speakers' input connectors. However, this is only permitted if both loudspeakers have a nominal impedance of at least 8 ! [. . . ] This is the mostly the point where the central grounding point is attached to. By doing this the housing is able to shield all signals from external radiated noise. Some main amplifiers are equipped with a "Ground Lift"-switch. If it is activated, ground potential of the chassis and the protective ground wire are being separated from the central signal ground point. [. . . ]