NAD C 272 Sleep/Wake-Sense/Defeat, Front Panel Controls Figure STAND-BY/PROTECTION Indicator

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by the amber LED above the power switch on the front panel. If the amplifier will not be used for an extended period of time, switch the VACATION switch to the OFF position.

12. SLEEP/WAKE-SENSE/DEFEAT

The SLEEP/WAKE, SENSE/DEFEAT switch logic controls the standby/on-state of the amplifier via the presences or absence of audio signal at the amplifier channel inputs. The SLEEP/WAKE, SENSE/DEFEAT switch must be in the SLEEP/WAKE position in order to use this logic. When the SLEEP/WAKE, SENSE/DEFEAT switch is in the SENSE/DEFEAT position, this logic control is deactivated.

When the switch is in the SLEEP/WAKE position, the C 272 amplifier will instantaneously turn on from a standby state, sensing any input signal from any channel as seen by a lit green SENSE LED on the front panel of the amplifier (approximately above 20mV RMS input). If all of the audio signals are absent for approximately 5 minutes, the amplifier will switch automatically to standby condition, with the green SENSE LED off, and the amber LED over the front panel switch lit.

FRONT PANEL CONTROLS (FIGURE 2)

1. STAND-BY/PROTECTION INDICATOR

Upon switching Power on, the indicator will light up red and after a short pause turn to green to indicate the amplifier is ready for use.

In cases of serious abuse of the amplifier, such as overheating, excessively low loudspeaker impedance, short circuit, etc. the amplifier will engage its Protection circuitry. The indicator will light up red and the sound will be muted. In such a case, turn the amplifier off, wait for it to cool down and/or check the speaker connections, making sure the overall loudspeaker impedance doesn’t go below 4 ohms or 8 ohms in Bridge Mode. Once the cause for the protection circuitry to engage has been removed, switch the amplifier On again.

The diagram below shows the operation of the Stand- by/protection indicator:

 

Green

Amber

Red

Normal Operation

•

 

 

Stand-by

 

•

 

Protection

 

 

•

 

 

 

 

2. POWER ON/OFF

Press this button to switch the amplifier on or off. The Power On/Standby (No. 1) indicator located just above the power button and Protection indicator will light up. After a few seconds, the Protection LED will turn off, indicating that the amplifier is ready for use.

3. TRIGGER INDICATOR

The 12V-TRIGGERLED illuminates green when the amplifier switches from standby to power on state via the 12V input (refer to “Rear-Panel Connections”: 12V-TRIGGER INPUT section). Once you turn on the amplifier via the 12V-IN TRIGGER, only the absence of the 12V can return the amplifier to standby state.

4. SENSE INDICATOR

The SENSE LED illuminates green when the amplifier senses a signal greater than 20mV RMS on any of the amplifier inputs refer to “Rear- Panel Controls and Connections”: SLEEP/WAKE, SENSE/DEFEAT section). Once you turn on the amplifier via the SLEEP/WAKE sense logic, only the absence of a signal to all the amplifier’s inputs can return the amplifier to standby state.

5. SOFT CLIPPING™ INDICATOR

The green SOFT CLIPPING™ indicator shows that the Soft Clipping™ mode is engaged. Refer also to chapter “Rear Panel Connections”, section 7; “Soft Clipping™” for more information.

6. BRIDGE MODE INDICATOR

The BRIDE MODE indicator lights up (amber) when the C 272 is switched to Bridge Mode. Refer also to chapter “Rear Panel Connections”, section 6, “Bridge Mode” for more information.

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Contents 272 Important Safety Instructions Rear Panel Connections Figure Front Panel Controls FigureNAD C 272 Stereo Power Amplifier Speakers a & Speakers B Bare Wires and PIN ConnectorsBridge Mode Soft ClippingTrigger Indicator Front Panel Controls Figure STAND-BY/PROTECTION IndicatorPower ON/OFF Sense IndicatorATO Logic Chart ATO LogicTroubleshooting Problem Cause SolutionPage Amplificateur de Puissance NAD C Bi-Amplificateurs Commande DE Niveau D’ENTREE Input LevelMode Ponte HAUT-PARLEURS a & HAUT-PARLEURS BFonctionnement normal Veille Protection Indicateur Capteur Sense Indicateur DE Mode Ponte Bridge ModeIndicateur d’ASSERVISSEMENT Trigger Indicateur D’ECRETAGE Doux Soft ClippingATO Logic DE NAD Tableau DE Logique DE Mise EN Marche Automatique ATO LogicDepannage Endverstärker NAD C BRIDGE-MODUS Brückenschaltung Eingangspegelsteller Input LevelBlanke Drähte UND Endhülsen Soft ClippingNormalbetrieb Bereitschaftsmodus Schutzschaltung Anzeige Bridge Mode NAD ATO LogicATO-LOGIC-TABELLE Problemlösung Page Notas Sobre LA Instalacion Amplificador NAD CInicio Rapido Conexiones DEL Panel Trasero Figure FixedSpeakers a & Speakers B Cables Desnudos Y Conectores DE Patillas12V Trigger Auto ON-OFF Funcionamiento normal Stand-by Protection NAD ATO Logic Logitrónica ATO DE NAD Tabla DE ATO Logic Logitrónica ATOInvestigacion DE Averias Page Amplificatore NAD C Fili Scoperti E Connettori a Piedini Controllo Livello DI InputAltoparlanti a ED Altoparlanti B Modo PonticellareVerde Arancione Rosso Attesa Standby ProtezioneSchema Della Logica ATO Logica NAD ATORicerca Guasti Page Amplificador de Energia NAD C Speakers a & Speakers B Altifalantes a E B Bridge Mode Modo DE Ligação EM PonteInput Level Control Controlo DE Nível DE Entrada Cabos a Descoberto E Terminais DE PinosFuncionamento normal Stand-by Protecção Trigger Indicator Indicador Trigger Bridge Mode Indicator Indicador DE Modo DE Ligação EM PonteSLEEP/WAKE, SEBSE/DEFEAT Indicador Detecção Circuito Lógico DE ATO Patenteado Pela NAD Tabela do Circuito Lógico DE ATOResolução DE Problemas Anslutningar PÅ Apparatens Baksida Figure Fixed ATT Tänka PÅ VID InstallationSnabbstart Ingångsväljare12V Trigger Automatiskt AV OCH Påslag Högtalarterminaler a & BBryggkoppling 12V Trigger IngångRött Stand-by SkyddslägeNAD ATO Logic ATO Logic TabellFelsökning 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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