User manual NAD 310

[. . . ] Note to CATV system installer: This reminder is provided to call the CATV installer's attention to Article 820-40 of the NEC , which provides guidelines for proper grounding and, in particular, specifies that the cable should be connected to the grounding system of the building, as close to the point of cable entry as practical. The lightning flash with arrowhead, within an equilateral triangle is intended to alert the user of 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. Connect the wires from your left-channel speaker to the (L+) and (L-) terminals, and connect the wires from the right-channel speaker to the (R+) and (R-) terminals. in each channel the red terminal is the positive (+) output , and the black terminal is the negative (-) or "ground" terminal. [. . . ] the Treble control has no effect if the TONE DEFEAT button is engaged. NOTE: At high volume settings (with the volume control over the 12 o'clock position) both the Bass and Treble controls do not have any effect anymore. To switch the power off, press the button again and release it. NOTE: When the amplifier is switched off with a source (such as a CD) still playing there will still be sound for as much as several seconds, depending on the volume level, before it eventually dies out. Although completely harmless, it can be avoided switching off the source first or by turning down the volume first. CAUTION: In the off position the unit is still connected to the mains. Disconnect the power cable when the unit is not to be used for a long time. The POWER indicator glows green when the amplifier is switched on and ready for use. The amplifier incorporates protection circuitry against conditions such as overheating, short circuits, and DC off-set. Under normal conditions, this indicator will not light up and the unit will operate normally. If however one of the decribed conditions occur, the indicator will light up red and the unit will stop working. tURN DOWN the volume all the way and SWITCH OFF the amplifier IMMEDIATLY. Investigate the cause for the protection circuitry to trip, such as a short circuit in any of the speaker leads or any wire touching an adjecant terminal at either the amplifier's or loudspeaker's end. If overheating was the cause (the amplifier's casing will be very warm) ensure the ventilation slots at the bottom and top are not blocked. Overheating can also occur by playing very loud for a prolonged time. Wait for a couple of minutes for the amplifier to cool down before switching it on again. If the protection circuitry remains engaged, even after the amplifier has cooled down sufficiently and all NAD 5 The Bass control adjusts the relative level of the low frequencies in the sound. The response of the amplifier is flattest when the control is set in the detent at the 12 o'clock position. Rotation of the knob to the right (clockwise) increases the level of low-frequency sounds, and rotation counter-clockwise decreases their level. the Bass control has no effect if the TONE DEFEAT button is engaged. At moderate rotations away from center the effect of the Bass control is subtle, because its action is Connections have been checked you will have to consult your NAD dealer. Signal passing through the recorder's electronics (including its recording level controls). [. . . ] Thus you may play music at volume levels that cause the brief transient peaks and climaxes in music to exceed the amplifier's rated power by a considerable margin. But if you overdrive the amplifier continuously rather than only on peaks, the output transistors may overheat. This is particularly likely if you try to drive two pairs of speakers, or speakers having a very low impedance, at high volume levels. If the amplifier stops playing and the "Protection" indicator glows red, switch off the power for a few minutes and allow the output stage to cool. [. . . ]