NAD C 272 Speakers a & Speakers B, Bare Wires and PIN Connectors, Bridge Mode, Soft Clipping

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5. SPEAKERS A & SPEAKERS B

The NAD C 272 is equipped with two sets of speaker connectors wired in parallel to facilitate connection of multiple pairs of speakers or “Bi-Wiring”. Use the Speakers A connectors for the ‘main’ speakers and use the Speakers B connectors for a second pair, for example, extension speakers located in another room.

Under normal operation, connect the right speaker to the terminals market ‘R +’ and ‘R-’ ensuring that the ‘R+’ is connected to the ‘+’ terminal on your loudspeaker and the ‘R-’ is connected to the loudspeaker’s ‘-’ terminal. Connect the terminals marked ‘L+’ and ‘L-’ to the left speaker in the same way.

In Bridge Mode, connect the single speaker to the terminals marked ‘R +’ and ‘L+’ ensuring that the ‘L+’ is connected to the ‘+’ terminal on your loudspeaker and the R+ is connected to the loudspeaker’s ‘-’ terminal. Refer also to section “Bridge Mode” in this chapter (No. 6).

Always use heavy duty (16 gauge; 1.5mm, or thicker) stranded wire to connect loudspeakers to your NAD C 272. The high-current binding post terminals can be used as a screw terminal for cables terminating in spade or pin sockets or for cables with bare wire ends.

BARE WIRES AND PIN CONNECTORS

Bare wires and pin sockets should be inserted into the hole in the shaft of the terminal. Unscrew the speaker terminal’s plastic bushing until the hole in the screw shaft is revealed. Insert the pin or bare cable end into the hole and secure the cable by tightening down the terminal’s bushing. Ensure bare wire from the speaker cables does not touch the back panel or another socket . Ensure that there is only 1/2” (1cm) of bare cable or pin and no loose strands of speakers wire.

NOTE: Make sure the speaker impedance is 4 ohms or more when connecting only one pair of speakers; make sure the speaker impedance for all speakers is over 8 ohms when connecting two sets of speakers. In Bridge Mode, the impedance of the loudspeaker should also be 8 ohms or higher.

Always turn the C 272 and other components in the system off before connecting or disconnecting speakers.

6. BRIDGE MODE

The stereo NAD C 272 power amplifier can be configured to be mono (Bridge Mode), more than doubling its output power: 2 x 120 vs. 1 x 300 Watt. This way, the NAD C 272 can be used as part of a high power stereo or home-theatre system, by connecting adding additional power amplifiers.

Set the BRIDGE MODE switch to the “Bridge” position and connect the speaker to the terminals marked ‘L +’ and ‘R+’ ensuring that the ‘L+’ is connected to the ‘+’ terminal on your loudspeaker and the ‘R+’ is connected to the loudspeaker’s ‘-’ terminal. Connect the source to the Left FIXED, or VARIABLE input.

In Bridged Mode the NAD C 272 will produce approximately 300W into an 8 ohm loudspeaker. In this mode, the amplifier sections will react as though the speaker impedance has been halved. Low impedance speakers (under 8 ohms) are not recommended when using Bridge Mode, as these may cause the amplifier’s thermal cut- out to operate if played at high levels.

The Bridge Mode indicator on the front panel (Fig. 2; No. 6) will illuminate when the amplifier is in Bridge mode.

NOTES: Do not connect anything to the Right “Fixed In” or Right “Variable In” sockets when Bridge Mode is selected.

Always turn the C 272 and other components in the system off before connecting or disconnecting anything to the “Fixed In” or Variable In” sockets.

7. SOFT CLIPPING™

When an amplifier is driven beyond its specified power output, a hard, distorted sound can be heard on very loud sounds. This is caused by the amplifier cutting off or ‘hard clipping’ the peaks of sound that it was not designed to reproduce. The NAD Soft Clipping™ circuit gently limits the output of the system to minimise audible distortion if the amplifier is overdriven.

If your listening involves moderate power levels you may leave the Soft Clipping™ switch to Off. If you are likely to play at high levels, that could stretch the amplifier’s power capability, then switch Soft Clipping™ On.

The Soft Clipping™ indicator on the front panel will illuminate when the amplifier is in Soft Clip mode.

8. 12V TRIGGER AUTO ON-OFF

The C 272’s 12V trigger input allows it to be switched to On and

Stand-by remotely by an external component.

Set the 12V Trigger switch set to the “ON” position to activate the 12V Trigger input. When the switch is set to the Off position, the 12V trigger input is not active. Refer to section “12V Trigger In” below for more information.

9. 12V TRIGGER IN

This input allows the C 272 to be switched remotely to stand-by and on or by ancillary equipment such as a preamp, AV processor, etc. which are also equipped with a 12V trigger output.

For switching Stand-by/Power On of the C 272 by an external component, connect the12V-trigger input of the C 272 to the remote component’s DC output jack. The plug required is a standard 3.5mm Mini-Jack plug (“mono”): The tip is the live or +

connection, the shaft of the input jack is the 12V-trigger - or GB ground connection.

NOTES: The C 272’s 12V Trigger will work within a range of 6 to 15 V DC level and typically draws less than 10mA of current. Check the specifications of the Trigger output terminal on the remote component to ensure it is compatible with the C 272’s 12V-trigger input. NAD components equipped with 12V output triggers are fully compatible with the C 272’s 12V input trigger.

Before making any connections to any 12V trigger input or output, make sure all components are disconnected from the AC mains.

Failure to observe the above may result in damage to the C 272 or any ancillary components attached to it. If in doubt over the connections, installation and operation of the 12V trigger output consult your NAD dealer.

10. AC LINE CORD

Plug the AC power cord into a live AC wall socket. Make sure all connections have been made before connecting to mains.

11. VACATION ON/OFF

The VACATION switch is the master on/off control for the amplifier.

When the switch is in the ON state the amplifier is in standby as shown

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Contents 272 Important Safety Instructions Front Panel Controls Figure Rear Panel Connections FigureNAD C 272 Stereo Power Amplifier Bridge Mode Bare Wires and PIN ConnectorsSpeakers a & Speakers B Soft ClippingPower ON/OFF Front Panel Controls Figure STAND-BY/PROTECTION IndicatorTrigger Indicator Sense IndicatorATO Logic ATO Logic ChartProblem Cause Solution TroubleshootingPage Amplificateur de Puissance NAD C Mode Ponte Commande DE Niveau D’ENTREE Input LevelBi-Amplificateurs HAUT-PARLEURS a & HAUT-PARLEURS BFonctionnement normal Veille Protection Indicateur d’ASSERVISSEMENT Trigger Indicateur DE Mode Ponte Bridge ModeIndicateur Capteur Sense Indicateur D’ECRETAGE Doux Soft ClippingTableau DE Logique DE Mise EN Marche Automatique ATO Logic ATO Logic DE NADDepannage Endverstärker NAD C Blanke Drähte UND Endhülsen Eingangspegelsteller Input LevelBRIDGE-MODUS Brückenschaltung Soft ClippingNormalbetrieb Bereitschaftsmodus Schutzschaltung ATO-LOGIC-TABELLE Anzeige Bridge ModeNAD ATO Logic Problemlösung Page Inicio Rapido Amplificador NAD CNotas Sobre LA Instalacion Conexiones DEL Panel Trasero Figure Fixed12V Trigger Auto ON-OFF Speakers a & Speakers BCables Desnudos Y Conectores DE Patillas Funcionamiento normal Stand-by Protection Tabla DE ATO Logic Logitrónica ATO NAD ATO Logic Logitrónica ATO DE NADInvestigacion DE Averias Page Amplificatore NAD C Altoparlanti a ED Altoparlanti B Controllo Livello DI InputFili Scoperti E Connettori a Piedini Modo PonticellareAttesa Standby Protezione Verde Arancione RossoLogica NAD ATO Schema Della Logica ATORicerca Guasti Page Amplificador de Energia NAD C Input Level Control Controlo DE Nível DE Entrada Bridge Mode Modo DE Ligação EM PonteSpeakers a & Speakers B Altifalantes a E B Cabos a Descoberto E Terminais DE PinosFuncionamento normal Stand-by Protecção SLEEP/WAKE, SEBSE/DEFEAT Indicador Detecção Trigger Indicator Indicador TriggerBridge Mode Indicator Indicador DE Modo DE Ligação EM Ponte Tabela do Circuito Lógico DE ATO Circuito Lógico DE ATO Patenteado Pela NADResolução DE Problemas Snabbstart ATT Tänka PÅ VID InstallationAnslutningar PÅ Apparatens Baksida Figure Fixed IngångsväljareBryggkoppling Högtalarterminaler a & B12V Trigger Automatiskt AV OCH Påslag 12V Trigger IngångStand-by Skyddsläge RöttATO Logic Tabell NAD ATO LogicFelsökning Page NAD Electronics

C 272 specifications

The NAD C 272 is a high-performance power amplifier designed for audiophiles seeking exceptional sound quality and versatility. This amplifier integrates advanced technology and robust engineering, making it a popular choice for both home theater setups and stereo systems.

One of the main features of the NAD C 272 is its power output. It is capable of delivering an impressive 150 watts per channel into 8 ohms, with dynamic power reaching up to 300 watts into 4 ohms. This allows the C 272 to drive a wide range of speakers, providing ample headroom for complex musical passages or explosive soundtracks. The amplifier employs a high-current design that ensures it can handle transient peaks without distortion, resulting in a clear and dynamic sound.

The C 272 utilizes NAD's proprietary PowerDrive technology, which intelligently manages the amplifier’s output to deliver the necessary power without sacrificing sound quality. This technology ensures that the amplifier maintains control over the speakers, allowing for detailed and accurate reproduction of music across various genres. Additionally, the C 272 features an adaptive biasing system that optimizes the amplifier’s operation, improving efficiency and thermal performance.

Constructed with a solid chassis, the C 272 is designed to minimize vibration and electromagnetic interference. This helps preserve the integrity of the audio signal, resulting in a transparent and lifelike listening experience. The amplifier's user-friendly design includes a straightforward front panel with power and input select buttons, while the rear panel provides connections for both balanced and unbalanced inputs, making it compatible with a wide range of audio components.

The NAD C 272 also features protection circuits that safeguard the amplifier and connected speakers from overheating and short-circuit issues. This reliability makes it an ideal choice for long listening sessions, ensuring peace of mind while enjoying your favorite music or movies.

In conclusion, the NAD C 272 stands out for its combination of power, technology, and sound quality. The amplifier caters to those who prioritize performance in their audio systems, making it a worthy addition for any serious music lover or home theater enthusiast. With its robust engineering and high-quality components, the C 272 continues to receive accolades for its ability to deliver a rich and engaging listening experience.
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