User manual NAD 911

[. . . ] If an indoor antenna is used (either built into the set or installed separately), never allow any part of the antenna to touch the metal parts of other electrical appliances such as a lamp, TV set etc. Warning: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. The lightning flash with an arrowhead symbol within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. Any outdoor antenna must be located away from all power lines. [. . . ] Line level inputs for each of the six channels. These can be connected to any type of audio system such as a hi-fi preamplifier, cassette deck, CD player, mixer or the audio outputs of a video player. For mono sources use a single channel, for stereo sources use two adjacent channels. The level of the signal on this connector remains the same regardless of the front panel level controls. the INSERT signal does not appear on the FIXED OUT connections. The level is suitable for driving standard hi-fi components and amplifiers and can be used with leads up to 1nF total capacitance. If necessary, lightly dampen the cloth with soapy water. Do not use solutions containing benzol or other volatile agents. The level of the signal on this connector is altered by the front panel LEVEL controls (5). the INSERT signal will appear mixed on the VARIABLE OUT connections when selected by pressing the INSERT buttons. At its higher settings of the LEVEL control, this output will drive professional (20dBu/600ohm) amplifiers. The variable output has a low impedance so it can be used to drive long cable runs up to 22nF total capacitance. Power switch to turn the NAD-911 on or off. Press out to completely disable the Insert signal on all channels. In most installations using the NAD-911, the hi-fi preamplifier is used to select the appropriate music source and for every-day adjustment of the music volume in the venue. Any hi-fi preamplifier can be used with the NAD911 or alternatively an integrated hi-fi amplifier can be used providing it has a `pre-amp' output. nAD supplies a range of preamplifiers and integrated amplifiers suitable for use with the NAD-911. Some installations will use a mixer instead of a preamp and this is connected and used with the NAD911 in exactly the same way as a preamplifier. The channel outputs of the NAD-911 will work with both hi-fi and professional power amplifiers. There is a range of NAD single channel, stereo or multi-channel power amplifiers that are suitable to work with the NAD-911. You should ensure that the power output level of the power amplifiers used in the installation matches the capabilities of the loudspeakers. If you are using a power amplifier with its own volume control, during installation set the NAD-911 LEVEL controls (3) to the 12 O'clock position and then adjust the power amplifier's volume control so that the sound level from the speaker is about right for normal use. [. . . ] Turning up the channel's level control will then also turn up the volume of the microphone. A third setting switches off the microphone signal from that channel completely. Whilst the basic function of accurately setting the music levels to individual speakers is generally the same in all installations, the announcement requirements may vary enormously. The Insert configuration allows installers to match the operation of the NAD-911 exactly to the announcement needs of the user. [. . . ]