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. For your own safety do not under any circumstances open Naim equipment without first disconnecting it from the mains. Warning: an apparatus with CLASS I construction shall be connected to a mains socket outlet with a protective earthing connection. [. . . ] The preamplifier volume control will not rotate during this operation. Note: The front panel volume control cannot be used to adjust input volume compensation. To exit program mode press and hold the handset prog key until the volume control indicator stops flashing. Note: Input Volume Compensation can be reset by restoring the factory defaults. See Section 17. 11 17. 2 Automatic Input Switching The NAC 112x incorporates an optional automatic input switching feature which can select the appropriate input when any handset function for a particular Naim source component is operated. For example, if the tuner input is selected on the NAC 112x and the cd play key is operated on the handset, the NAC 112x will automatically switch to the cd input. Automatic input switching can operate on any combination of the cd, tuner and av inputs. To enable automatic input switching, first switch the NAC 112x into program mode as described in Paragraph 17. 1. Program mode is indicated by a flashing indicator on the volume control. The front panel mon button will illuminate if automatic input switching is already enabled. If it is not enabled it can be activated by pressing the handset mon key or front panel mon button twice. With automatic input switching enabled, pressing the mon key or the mon button will reveal the inputs selected for automatic input switching by their button indicators illuminating for a short time. Repeated operation of the mon key or mon button will sequentially select through each possible combination of cd, tuner, and av inputs, and automatic input switching disabled (cd, tuner and av indicators off). When the desired inputs selected for automatic input switching are indicated, stop pressing the key or button. 17. 4 AV Integration (Unity Gain) The unity gain function enables an audio-visual processor to be integrated such that its volume control takes over command of signals connected to selected NAC 112x inputs. To select unity gain, first switch the NAC 112x into program mode as described in Paragraph 17. 1. 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. 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. 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. [. . . ] The six channels are configured as three sets of two (left and right). The three sets are intended to provide audio power to drive one pair of loudspeakers in three multi-room "zones". The NAPV 175 is heavy and care should be taken when lifting or moving it. 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. [. . . ]