20 Most Recent NAD C270 2-Channel Amplifier Questions & Answers

You should use the mixed audio out connector of the M55 or the two plugs for the component video out. (the bottom two) That should be plugged in on the CD input of the M15.

But I assume you already got any sound out of the set.
If you are starting, you really should read the manuals, because there are so many things you have to take in account. It could end you can play CD's, but have to re cable the system when you want to play a DVD or a blue ray.

NAD C270... | Answered on Nov 12, 2013

These needs repair.

Check for shorted drive / output transistor and associated circuits.

NAD C270... | Answered on Aug 30, 2012

Bear in mind that 901's require exclusive use of any amplifier they use. You shouldn't expect to use conventional speakers alongside them on the same amp. The reason is that the 901's require the use of their dedicated Active Equalizer to shape the frequency spectrun to match their drivers' response curves, resulting in a flat sound output. Applying that kind of equalization to any conventional speakers will sound to sharp at the extremes and may even potentially damage them.

For connection I would run a pair of RCA cables from the L&R Audio Line OUT of whatever preamp or source you're using to the Active EQ's Line IN; then the EQ's Line OUT to a NAD amp's Line IN. DEselect any Tape options on the Active EQ, attach the 901's to the new amp, set the NAD volume controls pretty high (and leave them alone), run through any level setup procedures in your control electronics for volume, etc and you're done.

NAD C270... | Answered on Aug 18, 2010

if the hum is in the sound output you have a blown power regulator

NAD C270... | Answered on May 27, 2010

you might try some compressed air the air vent may be plugged and the fan is overcompensating for the extra heat .. .hope this helps

NAD C270... | Answered on Apr 20, 2010


NAD C270... | Answered on Dec 26, 2009

The short answer is yes. This is normal for this type of fuse.


NAD C270... | Answered on May 26, 2009

The buzzing is coming from the transformer. It is almost expected of an amplifier of this size, that the transformer (a large one) will excite the resonance of the casework and make some noise.

NAD C270... | Answered on May 16, 2009

The AH may denote "slo-blo" style as opposed to Fast-acting
A fast-acting fuse will look like a single strand of wire ( maybe wiggly looking) ..A Slo-blo will have an element in it and a spring

NAD C270... | Answered on Apr 11, 2009

Please do not use a heavier fuse. The fuse is there to protect the unit from damage when there is a problem. Using a heavier fuse will most likely cause further damage. Since the problem seems to be intermittant, it can be a component that is beginning to break down or something as simple as a bad connection internally. If you have no experience working with electronics, I would not recommend you start here.

Something that would help a bit is to see if there is a pattern to when this problem occurs. For instance, does it seem to happen more when the unit is cold or warm? Does it happen more often after being run for a while? These are the subtle clues that will help to narrow down the source of the problem.

Please update this with any additional clues and I'll try to suggest possible fixes.


NAD C270... | Answered on Apr 07, 2009

This is the technical solution, you have to open the unit:
Locate IC33 and connect pin 6 to ground, connect power, and then remove the ground connection at pin 6.
The unit will then boot up in factory default.

Henrik Pedersen

NAD Audio... | Answered on Oct 29, 2019

Hi Michael, check inside your NAD C542, there are 4 fuses, check that none is open, if all are well, you could have problems with the capacitors in the area of the power supply or in the case of the Transformer
If you do not have technical capabilities to evaluate the above, consult a specialized technical service
I hope you can solve the problem
Greetings Franco Dosil

Hola Michael, revisa en el interior de tu NAD C542, hay 4 fusibles, controla que ninguno se encuentre abierto, si est?n todos bien, podr?as tener problemas con los capacitores del ?rea de la fuente de alimentaci?n o en el pero de los casos el Transformador
Si no tienes capacidades t?cnicas para evaluar lo previamente indicado, consulta un servicio t?cnico especializada
Espero puedas resolver el problema
Saludos Franco Dosil


NAD Audio... | Answered on Sep 16, 2019

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