User manual NAIM AMPS&PSU

[. . . ] WORLD CLASS HI-FI OWNERS MANUAL Preamplifiers, Integrated Amplifier, Power Amplifiers, Power Supplies Contents IMPORTANT In order to comply with current European safety regulations it is essential that the Naim loudspeaker connectors supplied with amplifiers and loudspeakers are used. Do not under any circumstances allow anyone to modify your Naim equipment without first checking with the factory, your dealer, or your distributor. Unauthorised modifications will invalidate your guarantee. For your own safety do not under any circumstances open Naim equipment without first disconnecting it from the mains. [. . . ] The front panel mute button will illuminate if unity gain is selected. If it is not enabled it can be switched on by pressing the remote handset mute button. Deselect unity gain by again pressing the handset mute button. Note: The unity gain feature must be used with care. It effectively by-passes the NAC 112x volume and balance controls leaving any signal connected to a unity gain input to be passed to the power amplifier and speakers at full volume. Additionally, if the handset preamplifier volume or balance functions are operated while the unity gain AV input is selected, subsequently selected inputs will be modified by the new volume or balance settings. 17. 5 Handset Volume The remote handset vol keys provides some alternative control characteristics. A quick press and release of a key will adjust the volume by a small amount while a press and hold will cause first slow and then faster adjustment. 15 NAC 112x 17. 6 Channel Balance Channel balance adjustment is operated electronically within the preamplifier and is controlled by the remote handset bal keys only. Balance will automatically centre as it reaches the mid point. Centring is indicated by a flashing volume control indicator. To resume adjustment once the balance has centred, a handset bal key must be released and re-pressed. 17. 10 Display The NAC 112x front panel button display can be switched off by pressing the remote handset (in preamplifier mode) disp function. Any subsequent handset or front panel operation will temporarily restore the display. A second operation of the disp function will permanently restore the display. 17. 7 Mute The mute button silences and restores the output signal. 17. 11 Switch-on After switch-on, via the power supply or power amplifier power button, the NAC 112x will remain muted for 15 seconds while control systems and circuits stabilise. 17. 8 Record Monitor The mon button operates the record monitor circuit enabling the recorded output of a suitably equipped recording device to be heard. 17. 12 Remote control The NARCOM 3 remote handset supplied with the NAC 112x duplicates all configuration options. The Flash and iCom handsets will also control the NAC 112x. See Sections 23 and 25 for more information. 17. 9 Record Mute In order to minimise power consumption and improve sound quality the NAC 112x record output circuits may be switched off. To engage or disengage the record mute first operate the record monitor function (mon) as described in Paragraph 17. 8 above then press the front panel mute button. The mute button indicator will be illuminated when record mute is engaged and extinguished when record mute is disengaged. Record mute can be engaged and disengaged from the remote handset by operating the record monitor function followed by the mute function. 17. 13 Defaults To restore all programmable settings to the factory defaults press and hold the remote handset disp key while the preamplifier is in program mode. The preamplifier will exit from program mode following this operation. 18. 1 NAC 112x Front volume mon mute source selection 16 Preamplifier NAC 112x 18. 2 NAC 112x Rear to power amplifier with internal power supply signal ground RC5 in RS232 interface aux 2/RCA Phono ch1 power supply cd/RCA Phono ch1 ch2 upgrade. link plug fitted ch2 in 6 (alternative) in 5 in 4 in 6 aux 2 aux 1 av in 3 tape in 2 in 1 tuner cd Inputs 1, 2 & 6 ch1 ch2 -ve nc nc Inputs 3, 4 & 5 ch1 ch2 -ve ch1 (out) ch2 (out) Input 6 (alternative) +ve ch2 -ve +ve ch1 Note: The NAC 112x AUX 2 input is provided with two sockets. The left hand socket, fitted on delivery with a blanking cover, is intended for use with a Stageline or Prefix RCA Phono stage and incorporates an appropriate DC power supply. The two sockets must not be used simultaneously. Note: The RS232/comms interface is an optional upgrade. [. . . ] Make sure that the surface it is to be placed on can support the full weight. Unused zone input sockets should be fitted with the supplied yellow shorting plugs. Failure to use the shorting plugs may reduce the reliability with which the NAP 6-50 drops into standby mode. Serious damage is likely to occur if yellow shorting plugs are used on Naim equipment other than the nap 6-50. The negative input and output connections within each zone are common but there is no signal negative connection between them. [. . . ]