User manual ARCAM FMJ P777

[. . . ] P777 Handbook Multichannel power amplifier MULTICHANNEL POWER AMPLIFIER 1 2 3 4 5 6 7 English CAUTION ATTENTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR attention! Assurez-vous qu'il est possible de dbranchez l'appareil aisment avec la fiche d'alimentation lectrique l'arrire de l'appareil. La construction CLASSE I doit tre connecte une prise ayant uneconnection terre protectrice. Ne pas nuire la bonne marche de scurit de la che polarise ou lache terre. La che polarise a deux broches, l'une plus paisse quel'autre. [. . . ] Check that the plug supplied fits your supply if your mains supply voltage or mains plug is different, or you need a new mains lead, please contact your Arcam dealer. Push the IEC plug end of the power cable into the socket on the back of the P777, making sure that it is pushed in firmly. Plug the other end of the cable into your mains socket and, if necessary, switch the socket on. installation < < < Connecting to a pre-amplifier Two different connection types are provided for receiving signals from your pre-amplifier: phono sockets and XLR connectors. The connection type to use depends on the set-up that you have. < If the cables to be used to connect your preamplifier to the P777 are less than 3m long, we recommend connecting your pre-amplifier to the AudIo IN phono (RCA) sockets of your P777. To use the phono connections, make sure that all the channel input switches are not depressed. < If the cables to be used to connect your preamplifier to the P777 are 3m or longer and your pre-amplifier has balanced XLR outputs, we recommend using these instead of the phono (RCA) connections. Performance will also be improved in electrically-noisy environments by using these connections. To use the XLR connections, make sure that the INPuT sElEcT switches are depressed for each channel. Female XLR 2 3 1 Room acoustics The shape of your room and how it's furnished will affect the sound you hear. For instance, too many bare surfaces can cause reflections that may add harshness to the sound. If you have a choice of rooms, avoid ones that are perfectly square or have one dimension exactly twice another. These rooms can aggravate resonances that colour the sound. 12V Trigger input If your pre-amp provides a 12V Trigger output, it can be connected to the 12V TRIGGER IN socket using a mono 3. 5mm jack. This enables the P777 to be turned on remotely from the pre-amp. tip: 12V trigger signal sleeve: ground Male XLR 1 3 2 Pin Note that the trigger input is only active when the central power button on the front panel is depressed. In normal use there is no need to make any connections to this input. 1 2 3 Function Chassis ground (cable shield) `Hot' (normal polarity) `Cold' (inverted polarity) E-4 Interconnect cables We recommend the use of high-quality screened cables that are designed for the particular application. Other cables will have different impedance characteristics that will degrade the performance of your system (for example, do not use cabling intended for video use to carry audio signals). All cables should be kept as short as is practically possible. It is good practice when connecting your equipment to make sure that the mains power-supply cabling is kept as far away as possible from your audio cables. Failure to do so may result in unwanted noise in the audio signals. Speaker terminals The P777 is equipped with seven pairs of speaker terminals. See page 7 for information on the different ways of connecting loudspeakers. Input select switch Depress this switch to take the audio source from the BAlANcEd XlR INPuT connector for each channel; if the switch is not depressed, the audio source is taken from the AudIo IN RCA (phono) connector. CH. 7 / SBR 416 OHMS CH. 6 / SR 416 OHMS CH. 5 / RIGHT 416 OHMS CH. 4 / CENTRE 416 OHMS CH. 3 / LEFT 416 OHMS CH. 2 / SL 416 OHMS CH. 1 / SBL 416 OHMS CLASS 2 WIRING + BALANCED XLR INPUT CLASS 2 WIRING + BALANCED XLR INPUT CLASS 2 WIRING + BALANCED XLR INPUT CLASS 2 WIRING + BALANCED XLR INPUT CLASS 2 WIRING + BALANCED XLR INPUT CLASS 2 WIRING + BALANCED XLR INPUT CLASS 2 WIRING + BALANCED XLR INPUT XLR audio input Balanced XLR connectors for each of seven channels, from an XLRequipped pre-amplifier. XLR RCA XLR XLR XLR XLR XLR XLR INPUT SELECT RCA INPUT SELECT RCA INPUT SELECT RCA INPUT SELECT RCA INPUT SELECT RCA INPUT SELECT RCA INPUT SELECT IN OUT AUDIO IN OUT AUDIO IN OUT AUDIO IN OUT AUDIO IN OUT AUDIO IN OUT AUDIO IN OUT AUDIO POWER INLET Power inlet Check the mains supply voltage matches the values printed on the back panel before connecting the mains cable here. 220V - 240V 5060Hz 1800VA MAX 12V TRIGGER IN XLR CONNECTIONS: PIN1: CABLE SCREEN PIN2: HOT SIGNAL PIN3: COLD SIGNAL 2 3 1 12V Trigger input See page 4 for details. audio input and output AudIo IN from a pre-amplifier for each of seven channels. [. . . ] The amplifier stays in this state until all channels have cooled, or the transformer has cooled. During power up or normal operation, all the LEDs are flashing amber During normal operation, all the LEDs are solid red An over temperature fault has reoccurred on one or more The amplifier shuts down. The power switch must be channels, or the power transformers have overheated cycled to reset the amplifier (cycling the trigger resets the within 12 seconds of a previous over temperature fault amplifier). A DC offset fault occurred on one or more channels while attempting to clear a multiple over temperature fault. A short circuit fault occurred on one or more channels while attempting to clear a multiple over temperature fault. [. . . ]