NAD 310 GB F D E I S · OWNER'S MANUAL · MANUEL D'INSTALLATION · BEDIENUNGSANLEITUNG · MANUAL DEL USUARIO · MANUALE DELLE ISTRUZIONI · BRUKSANVISNINGARNA WARNING:TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE 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. CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. ATTENTION: POUR EVITER LES CHOCS ELECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQU'AU FOND. 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. The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance NAD 310 STEREO INTEGRATED AMPLIFIER REAR PANEL CONNECTIONS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SEVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. ATTENTION: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR AFIN DEVITER UN CHOC ELECTRIQUE, ET LES CONSEQUENCES GRAVES QUI POURRAIENT EN RESULTER, TENTEZ PAS D'OUVRIR L'APPAREIL ET DE TOUCHER AUX COMPOSANTS INTERNES SANS LA PRESENCE D'UNE SERVICE PERSONNEL. NAD 2 FRONT PANEL CONTROLS FIGURE 1. FIGURE 2. C RE PE TA AY PL L R R L E AP TT PU IN UT TP OU NAD 3 GB NAD 310 STEREO INTEGRATED AMPLIFIER 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. For best stereo imaging, the left and right speakers should be located at equal distances from your chair. Use heavy-duty (1.5mm2, 16-gauge, or thicker) stranded wire, especially with 4-ohm loudspeakers. Bare wires can be connected directly to the bindingpost terminals. For a longer-lasting and more corrosion-resistant connection you may purchase speaker cables with nickel or gold-plated connectors (spade lugs, banana plugs, or pin connectors), or install such connectors on the wires yourself. Connections to each binding post may be made in several ways, as follows. [Figure 1.] (1) Pin connectors. A pin connector is a slim metal shaft that is crimped or soldered onto the end of a wire. The binding posts accept pin connectors up to 3mm in diameter. Unscrew the plastic bushing on each terminal to expose the hole in the metal shaft. Insert the pin connector through the hole, and turn the bushing clockwise until it is tight. (2) Spade lugs. Unscrew the colored bushing, insert the U-shaped spade lug behind the bushing, and tighten the bushing down on it. (3) Banana plugs. Insert a banana plug directly into the hollow end of each binding post. The terminals are separated by 3/4 inch (19mm), so they will accept dual-banana plugs. Before using banana plugs, the red and black inserts have to be removed with the aid of a small screwdriver. (4) Bare wires. Separate the two conductors of the cord, and strip off a half-inch (1 cm) of insulation from each. In each conductor, twist together the exposed wire strands. Unscrew the red or black bushing, insert the bare wire through the hole in the metal shaft, and tighten the plastic bushing until it grasps the wire securely. Check to be sure that no loose strand of wire is touching the chassis or an adjacent terminal. Phasing. Stereo speakers must operate "in phase" with each other in order to produce a focused stereo image and to reinforce rather than cancel each other's output at low frequencies. An in-phase connection is assured if the red (positive) terminal on the amplifier is connected to the red (positive) terminal on the loudspeaker, in each channel. Methods of checking for correct phasing are described in the Appendix. INSTRUCTIONS FOR INSTALLATION AND OPERATION A NOTE ON INSTALLATION This unit may be installed on any stable surface. Since its power transformer (near the left-rear corner) generates a magnetic hum field of moderate strength, an LP turntable should not be located directly to its left. The amplifier also generates a modest amount of heat and thus requires some ventilation. Do not place it on a rug or other soft surface that it could sink into, obstructing the air inlets on its bottom. And do not allow papers or cloth to obstruct the ventilation grille in the top cover. CAUTION: To prevent a fire or shock hazard, do not permit this product to become wet. If liquid is accidentally spilled on it, immediately shut off its power and unplug the AC power cord. Allow sufficient time for complete evaporation to occur before operating the amplifier again. If the liquid is anything but water and/or alcohol, the amplifier should be examined by a service technician before power is applied to it. Do not remove the cover, or attempt to modify or repair the amplifier yourself. Refer all servicing to a qualified technician. REAR PANEL CONNECTIONS 1. AC LINE CORD After you have completed all connections to the amplifier, plug the AC line cord into a "live" wall socket or into a heavy-duty extension cord. WARNING TO UK USERS. If this appartus is not fitted with a UK three-pin plug, do not attempt to insert the attached plug into a UK mains socket. Instead, cut the plug from the mains lead and attach a fused UK three-pin plug using the following safety advice on wiring. IMPORTANT. The wires in this mains lead are coloured BLUE and BROWN; BLUE: NEUTRAL BROWN: LIVE The colours of these mains lead wires may not correspond with the coloured markings identifying the terminals in your plug. In this case the BROWN wire must be connected to the terminal which is marked L(ive) or coloured RED. The BLUE wire must be connected to the terminal marked N(eutral) or coloured BLACK. No connection should be made to the terminal marked E or coloured green or green and yellow 3. CD INPUT. Connect the audio signal cables from a Compact Disc player to these jacks. (NOTE: this input is for an audio signal, not for the digital-code output of a CD player.) If you don't have a CD player, any other linelevel signal source (such as a MiniDisc player or a spare tape deck) may be connected to the CD input. 2. SPEAKER TERMINALS. Use these high-current binding-post terminals to connect your main stereo speakers. Each binding post consists of a threaded metal shaft and a red or black plastic screw-on bushing. 4. TUNER INPUT. Connect the audio signal cable from a radio tuner (AM, FM, or digital radio) to this pair of jacks. NAD 4 GB 5. AUX INPUT. Any "line-level" audio signal can be connected here, such as the playback signal from a second CD player, or with an external step-up amplifier, a turntable. confined to the lowest audible frequencies, which are not present in some recordings. Only at large rotations away from center is there a substantial boost or cut at the mid-bass frequencies that are common in music. 6. VIDEO SOUND INPUT. Connect a video-related audio signal here, such as the audio output from a video cassette recorder, laserdisc player, TV monitor/receiver, or stereo television decoder. Alternatively, any "line-level" audio signal may be connected here, such as the playback from a spare tape deck. 3. TONE DEFEAT. When this button is pressed the Bass and Treble circuits are completely bypassed, restoring precisely flat frequency response. When this button is OUT the tone controls operate normally. By adjusting the tone controls and then switching them in and out of the signal path, you can evaluate their effect on the sound. 7. TAPEPLAY/REC. These jacks allow you to connect tape recorder of any type, especially a high-performance cassette or open-reel recorder whose independent recording and playback heads allow you to monitor the signal on the tape immediately after it is recorded. Connect a stereo cable from the TAPE REC jacks of this amplifier to the recorder's LINE IN jacks, and a second cable from the recorder's LINE OUT jacks to these TAPE PLAY jacks. The TAPE jacks may be used for a signal-processing accessory instead of a tape recorder. Examples of such accessories include a dynamic range processor, a noise filter, or a graphic equalizer. Connect a patch cord from the TAPE REC jacks to the processor's inputs, and another patch cord from processor's outputs to the TAPE PLAY jacks. 4. TREBLE. The Treble control adjusts the relative level of the high 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 Treble control to the right (clockwise) increases the level of high-frequency sounds, and rotation counterclockwise decreases their level. Adjust the Treble control to achieve the tonal balance that sounds most natural to you. Boosting the Treble increases the brilliance and clarity of details in the sound, but also makes any noise more prominent. Turning down the Treble makes the sound mellower while suppressing hiss and record surface noise; but too much Treble roll-off will make the sound dull. 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. FRONT PANEL CONTROLS 1. POWER. Press this button to switch on the amplifier. 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. 5. POWER INDICATOR. The POWER indicator glows green when the amplifier is switched on and ready for use. 6. PROTECTION INDICATOR. 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 2. BASS. 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 GB connections have been checked you will have to consult your NAD dealer. signal passing through the recorder's electronics (including its recording level controls). In this case the TAPE MONITOR allows you to check the left/right balance of the signal as it is recorded. Note: If TAPE MONITOR is engaged with no recorder connected to TAPE PLAY, or with a recorder connected but not running, you will only hear the source connected to PORTABLE PLAY. If nothing is connected to this input you will only hear silence regardless of the settings of any other controls. Tape dubbing: Two way dubbing is possible. To record from a PORTABLE source, the PORTABLE button should be IN and the TAPE MONITOR button OUT. To record from TAPE to a PORTABLE, the PORTABLE button should ...