NAD M25 Input Level Controls, Auto Trigger ON/OFF, 12V-TRIGGER Input, Speaker Connections

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3. INPUT LEVEL CONTROLS

The amplifier is equipped with separate input level controls for each channel. Before turning on the M25 for the first time, make sure all level controls are in their normal full-clockwise position. With the input levels set to the maximum position, the gain is exactly conforming to THX Ultra2standards.

Under some circumstances, other settings may be useful for:

Level-matching - In systems that incorporate speakers of varying efficiencies, it may be necessary to reduce the settings of some controls to achieve proper channel-to-channel balance.

Extended volume-control range - Many stereo systems have so much voltage gain that the speakers (or your ears) are over-driven at any volume-control setting higher than 11 or 12 o’clock position of the volume control. As a result you can use only the lower half of the volume control’s range, where adjustments are imprecise and channel-balance errors tend to be greater. If all input level controls are reduced, you can turn up your preamplifier’s volume control, making effective use of most of its range. (Suggestion: Adjust the input level controls so that your preferred maximum sound levels occur at about 2 or 3 o’clock on the volume control.) As an added benefit, this procedure suppresses any noise produced by the preamp’s high-level circuitry (e.g. any residual hum or hiss that does not go away when the Volume is turned down).

5. AUTO TRIGGER ON/OFF

Set the Auto Trigger switch to the ON position to activate the 12V- trigger. By connecting the 12V-trigger, the M25 can be remotely switched to On and Standby and vice-versa. When set to the Off position, the 12V-trigger input is not active.

NOTE: With the Auto Trigger switch set to the ON position and the 12V-trigger input connected, the M25 will switch from Off to Stand-by when the Power Switch on the front panel is pressed. For normal operation, ensure the switch is in the OFF position or that the 12V-trigger input socket is not connected.

6. 12V-TRIGGER INPUT

For external Power on/Stand-by switching, connect the 12V-trigger output of a source component to this DC input jack. The center pin is the live or + connection, the outer sleeve of the input jack is the 12V- trigger - or ground connection.

NOTES: The M25’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 12V-trigger source to ensure it is compatible with the M25’s 12V-trigger input. Do not exceed the recommended voltage as this may cause damage to the M25.

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4. SPEAKER CONNECTIONS

This amplifier is equipped with special high-current binding-post speaker terminals. Connect the loudspeakers with heavy-duty (16- gauge or thicker) braided wire. Connections may be made in any of three ways. [See Figure 2.]

Strip off a half-inch (1 cm) of insulation from each speaker wire. In each conductor, twist the thin strands of wire together. Unscrew the knob, insert the bare wire into the opening at the base of the binding post, and tighten the knob until it grasps the wire securely. Check to be sure that there are no loose strands of wire touching the chassis or an adjacent terminal.

Spade lugs. Unscrew the knob, insert the U-shaped spade lug behind the bushing, and tighten the knob until the spade lug is secured.

Install banana plugs on your speaker wires, and plug them into the end of each binding post.

NOTE: Speakers must operate in phase with each other in order to produce a proper stereo image and to reinforce rather than cancel each other’s output at low frequencies. When connecting speakers, take care that the red (positive) terminal on each loudspeaker is connected to the corresponding terminal marked red (positive) on the amplifier.

7. SOFT CLIPPING

When an amplifier is driven beyond its specified power output it normally produces “hard clipping” or distortion of the signal. Such hard clipping, in addition to sounding unpleasant, can damage the speakers in the system. The NAD Soft Clipping circuit gently limits the output waveform, minimizing audible distortion and reducing the change of speaker damage when the amplifier is overdriven. We recommend that the Soft Clipping switch on the back panel of the M25 be left in the ON position when system is being operated at levels that might exceed the amplifier’s power capacity. The LED on the front panel indicates if Soft Clipping has been engaged.

8. FUSE HOLDER

There is a fuse holder nearby or next to the AC-line cord. In the unlikely event a fuse may need to be replaced, unplug the line cord from the wall. Then remove all connections from the amplifier. Only replace the fuse with the same type, size, and specification.

9. GROUND CONNECTOR

The M25 is provided with a GROUND terminal on the rear panel. This terminal is connected directly to the chassis of the M25. In the event of radio hum or radio interference, this terminal can be connected to a ‘true earth’ such as a copper plated rod driven several feet into the ground.

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Contents Seven Channel Power Amplifier Important Safety Instructions Important Safety InstructionsIf in Doubt Consult a Competent Electrician Important Information for UK CustomersBlue Neutral Brown Live Front Panel Controls Panel CONNECTIONS/CONTROLS Spade Wire Powerdrive About the M25 DesignIEC Power Socket Installation PrecautionsInputs Save ALL the PackagingGround Connector Input Level ControlsAuto Trigger ON/OFF 12V-TRIGGER InputPower SWITCH/STANDBY LED Protection LEDSoft Clipping Light Front Panel ControlsTroubleshooting Problem Cause Solution Specifications Amplifier SectionIHF Dynamic Power Dimensions and WeightsSvenska Português Italiano Español Deutsch Français English Propos DU M25 LA ConceptionPrécautions Concernant L’INSTALLATION Connexions / Commandes SUR LA Face ArrièreEmbase Dalimentation IEC EntréesCommandes DE Niveau D’ENTRÉE Marche / Arrêt DE LA Liaison DE Commande AutomatiqueEntrée DE Commande 12 V Trigger Connexions DES HAUT-PARLEURSCommandes SUR LA Face Parlante Connecteur DE Mise a TerregroundLeds DE Protection Témoins D’ÉCRÊTAGE DouxDépannage Problème Cause Solution CaractéristiquesSvenska Português Italiano Español Deutsch Français English Powerdrive Über DEN M25 DAS DesignIEC-NETZBUCHSE EingängeEingangspegeleinsteller LautsprecheranschlüsseTRIGGEREINGANG12 V Trigger SOFT-CLIPPINGNETZSCHALTER/STANDBY- LEDBEREITSCHAFTSMODUS-LED PROTECTION-LEDSCHUTZSCHALTUNG-LEDAnzeige VON SOFT-CLIPPING FrontplattenelementeProblemlösung Ursache Abhilfe Technische DatenIHF Dynamische Leistung Abmessungen UND GewichtSvenska Português Italiano Español Deutsch Français English NAD M25-Zevenkanaalseindversterker Informatie Omtrent DE M25 HET OntwerpIEC-AANSLUITING IngangenBedieningselementen Voor HET Ingangsniveau LuidsprekeraansluitingenAuto Trigger ON/OFF AAN/UIT Ingang 12V-TRIGGERIndicatoren ‘SOFT CLIPPING’ Geluidspieken Afkappen AAN/UIT-SCHAKELAAR / STANDBY-LEDBEVEILIGINGS-LEDS Bedieningselementen FrontpaneelProblemen Oplossen Probleem Oorzaak Oplossing Technische GegevensPage NAD M25 Amplificador De Potencia De Site Canales Sobre EL M25 EL DiseñoToma DE Alimentación IEC EntradasControles DE Nivel DE Entrada Conexiones DE AltavozAutodisparador ON/OFF Entrada DEL Disparador DEDiodo LED DE Interruptor DE ALIMENTACIÓN/RESERVA Standby Diodos LED DE ProtecciónLuces DE Soft Clipping Controles DEL Panel DelanteroInvestigación DE Averías Problema Causa Solución Dimensiones Y PesosEspecificaciones Potencia Dinámica IHFSvenska Português Italiano Español Deutsch Français English NAD M25 Amplificatore Di Potenza a Sette Canali Parliamo DELL’M25 IL DesignPresa DI Alimentazione IEC InputComandi Livello DI Input Connessioni Degli Altoparlanti12V Trigger Input Connettore MassaInterruttore DI ALIMENTAZIONE/LED DI Standby LED DI ProtezioneLuci Soft Clipping Comandi DEL Quadro AnterioreRicerca Guasti Problema Causa Dimensioni E PesiSpecifiche Potenza Dinamica IHFSvenska Português Italiano Español Deutsch Français English Powerdrivecircuito DE Transmissão DE Potência Acerca do M25 DesignTomada DE Alimentação IEC Cuidados a TER NA InstalaçãoNotas Sobre O Local DE Instalação Guarde Todas AS EmbalagensComandos do Nível DE Entrada Ligações DOS AltifalantesAuto Trigger ON/OFF LIGAR/DESLIGAR Disparador Automático Entrada do Disparador DE 12Ground Connector Terminal DE Terra P1. Interruptor DE Alimentação Power / LED DE StandbyProtection Leds Leds DE Protecção Luzes Indicadoras do Circuito Soft ClippingResolução DE Problemas Causa Solução EspecificaçõesPotência Dinâmica IHF Dimensões E PesosSvenska Português Italiano Español Deutsch Français English NAD M25 Sjukanals Effektförstärkare KonstruktionenIEC Nätkontakt IngångarIngångarnas Nivåreglage HögtalarkontakterOmkopplare FÖR Automatiskt AV OCH Påslag Ingång FÖR Automatiskt AV OCH PåslagAV/PÅ Knapp OCH Standby Lysdiod KanalindikatorerSoft Clipping Indikator Kontroller PÅ Apparatens FramsidaFelsökning Orsak Lösning SpecifikationerIHF Dynamisk Effekt Mått OCH ViktSvenska Português Italiano Español Deutsch Français English

M25 specifications

The NAD M25 is a powerful multichannel amplifier that represents the pinnacle of performance and versatility in the world of high-fidelity audio. Designed to cater to both audiophiles and home theater enthusiasts, the M25 is a testament to NAD's commitment to delivering high-quality sound and state-of-the-art technology.

One of the standout features of the NAD M25 is its robust power output. The amplifier delivers 160 watts per channel, with the ability to drive up to seven channels simultaneously. This makes it an ideal choice for a complete surround sound system, ensuring that every detail is reproduced with clarity, dynamics, and precision. The M25 utilizes NAD's proprietary PowerDrive technology, which optimizes the amplifier's output capabilities while maintaining low distortion levels, thus providing a refined listening experience.

The build quality of the NAD M25 is notable, featuring a solid chassis that minimizes vibrations and interference. This attention to detail not only enhances performance but also ensures long-lasting durability, making it a worthy investment for any audio setup. Furthermore, the amplifier is designed with high-quality components, including premium capacitors and transistors, which contribute to its overall sound quality and reliability.

Another significant technology integrated into the M25 is NAD's Dynamic Power, which allows the amplifier to deliver peak power levels that adapt to the demands of the audio being played. This feature enhances the amplifier's ability to handle dynamic music passages without compromising sound integrity, thus offering an exhilarating listening experience whether it’s music or movie soundtracks.

The NAD M25 also boasts flexibility in terms of connectivity. It includes a variety of inputs, such as balanced and unbalanced connections, which allow for easy integration into existing audio systems. Its design also supports bi-amping, giving users the ability to customize their setups to achieve optimal performance.

In terms of energy efficiency, the NAD M25 operates at a high level of effectiveness, complying with various energy-saving standards. This not only benefits the environment but also reduces operational costs for users over time.

In summary, the NAD M25 is a high-performance multichannel amplifier that excels in delivering power, clarity, and versatility. Its combination of advanced technologies, robust build quality, and user-friendly features make it an excellent choice for anyone looking to elevate their audio experience, whether for music, movies, or gaming. With the M25, NAD has once again proven its dedication to crafting audio equipment that meets the highest standards of quality and performance.