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. [. . . ] < 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. 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. 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). 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. AudIo ouT may be used to bi-amplify a set of speakers (see page 7). E-5 English PUSH PUSH PUSH PUSH PUSH PUSH PUSH speakers Speaker placement The P777 allows connection of up to seven loudspeakers. All speakers, with the exception of the subwoofer, should be arranged around your normal viewing/listening position (see diagram). The subwoofer can be placed almost anywhere and we recommend experimenting with it in various positions to obtain the best result. The closer you place a speaker to intersecting room surfaces (corners, wall and ceiling, wall and floor), the stronger the bass output. Again, just moving a speaker a few inches can often make a big difference in sound. Position your front left (L) and right (R) speakers to achieve a good stereo image for normal musical reproduction. If they are placed too close together there will be a lack of spaciousness. Alternatively if they are placed too far apart the stereo image will appear to have a hole in the middle and will be presented in two halves. The centre speaker (C) allows for a more realistic reproduction of dialogue and centre sounds as well as wider and better imaging for stereo effects and background sounds for home cinema use. [. . . ] The amplifier stays in this state until the channel has cooled. During power up or normal operation, one or more LEDs are flashing red, with the remaining LEDs NOT solid red During power up or normal operation, one or more LEDs are flashing amber During power up or normal operation, one LED is flashing amber, with the remaining LEDs solid red An over temperature fault has reoccurred on the same The amplifier shuts down. The power switch must be channel within 12 seconds of a previous over temperature cycled to reset the amplifier (cycling the trigger resets the fault clearance. The amplifier is attempting to clear an over temperature fault on more than one channel, or the power transformers have overheated. 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. [. . . ]