Question about NAD C320 2-Channel Amplifier

2 Answers

Nad c320 The amp crackels and cuts in and out when low frequencies are played through it. It's getting progressivly worse. This only happens when the speakers are connected. If you're listening with headphones it's ok.

Posted by on

  • 2 more comments 
  • handlestash Feb 14, 2008

    Robotek,



    They're Tannoy speakers. I can't remember the model but I've had them connectede to this amp for 10 years or so with no issues.

    It's a new problem and is getting so bad I can't turn the amp up past '1' because it goes into safety mode (is this the speaker protection you ask about?) when the bass cones in. I don't have the bass EQ turned up or anything, never have.

  • handlestash Feb 14, 2008

    Hi Robotek,



    The speakers you say. Hmmmm. I don't keep the covers on and the woofers look ok.

    How does one check their integrity?

  • handlestash Feb 15, 2008

    Hi again,



    I checked the surrounds last night. The rubber looks fine. No dryness or cracking. The action feels good when pressing them lightly (I could be talking about anything here)

    I tried panning the amp hard left and right and the sound drops out on each speaker at about the same level. I can get reasonable level from my cd player through the amp but I have my pc sound card connected to the amp too and I can only turn it up a tiny bit if I'm playing back bass frequencies (kick drum or bass guitar) before it starts to cut out.

    I don't know a thing about electronics I'm afraid.

    Thanks.


  • Graeme Ross
    Graeme Ross May 11, 2010

    If you could indulge me with a little more information from you...


    1. what make and model of speakers are you using

    2. has the problem just begun, or an ongoing thing.

    3. is the speaker protection oerating when it cuts out?

    thanks

    regards

    Graeme

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,512 Answers

It does sound like the speaker protection operating. First, try this.
Unclip the covers off your Tannoys, and check the integrity of the woofer cone surrounds... check that the surrounds have not failed that may be causing the voice coil to pole.

If they are ok, the amp may need some attention by way of resoldering of dry/cracked solder joints about the output stages. This occurs from the heating and cooling of the unit in normal operation. Check the speakers first, and we go from there.. :)

Posted on Feb 14, 2008

  • Graeme Ross
    Graeme Ross Feb 15, 2008

    Hi again, the reason I asked you to check the speaker surrounds for was to see if they have perished, and or disintegrated. When this occurs, cone misalignment will often force the voice coil to pole in turn presenting an unreasonable load on the amp. The poling effect often occurs when bass energy is being delivered by the amp. This follows your problem fairly closely, so worth a check to see..



    And with Rhodtech's indulgance, the headphone output IS connected directly (sometimes via speaker switching) to the speaker outputs in all HiFi amps... not as Rhodtech has suggested, from the preamp. The headphones do offer a much smaller load on the output stages, hence the problem not there when headphones are being used.



    The problem is inside the amp, from here is gets more involved. Do you have any experience with electronics, at least enough to check over the pcb for dry solder joints? Let me know. :)



    regards

    Graeme

×

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 35 Answers

If your amp is under warranty, bring it to the nearest service center to have it fixed. But if not, and you know a little electronics, check for the bloated capacitor and/or a burnt resistor on the audio module and replace it. still not working, change the audio I.C. of the amp. If you don't know electronics, bring it to the electronics shop. Audio coming out of the headphone is different form the audio of the speakers. Sounds on your headphone is coming from the preamp circuit. That explains why the headphone audio is ok.




A Simple Thanks is Good Enough

Posted on Feb 14, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My NAD C320 outputs a very low sound volume


Hi there I have a C340 that has similar problem, you must have bought this from ebay, lol.

Nad made a mistake on the C range, the pre - power link can be shorted out. if the pre is shorted out it takes out the pre amplifier stage, I have managed to get the right channel working, I will keep you informed what is the cause of the left channel. I have replaced the pre-amp IC and a couple of Jfets and transistors. Once I have repaired the Amp I could repaire yours if you like???

Apr 14, 2012 | NAD C320 2-Channel Amplifier

1 Answer

I have purchased the NAD C320 used. Have been


yes send it back chances are there could still be a warranty on it and that should be covered by it dont mess with it that could invalidate the warranty even if its not in warranty to replace the switch wont cost much.As for the contact cleaner be careful it is flamable and an arcing power button could ignite it do this with the unit unplugged but also make sure its dry after too do not do this unless you find the warranty has expired. Hope this helps

Oct 28, 2009 | NAD C320 2-Channel Amplifier

2 Answers

NAD C320 Amp Problem


It could be a pre amp or amplifier problem and would require either replacement or a service technician to look at it.

Jun 18, 2009 | NAD C320 2-Channel Amplifier

1 Answer

No volume control


lower the volume of the cd player

May 08, 2009 | NAD C320 2-Channel Amplifier

1 Answer

Nad 320a treble base balance


Well....Thats bloody far off from NEW England isnt it?
I'm in Vermont.
Try this user site:
http://www.vintage-radio.net/forum/index.php?s=debb585292d0fce6acfe29bd7aaaa287&

or:
The Audio Repair Shop in Greenford, Middx, UK (United Kingdom)Sorry about the Immense text..I cut n pasted.

Mar 24, 2009 | NAD C320 2-Channel Amplifier

1 Answer

PreAmp to Amp problem


Sorted it. You have to put the plugs back in the PreampOUt/Main in or it cuts out the pre-amp.

Nov 18, 2008 | NAD C320 2-Channel Amplifier

1 Answer

Cuts out when volume increased


it went to protection mode check your cables first and then check your speakers-and confirm no cable touch each other(try with another speakers had same rating)(watt)--means how much power can get.

Jul 28, 2008 | NAD C320 2-Channel Amplifier

1 Answer

Nad 310 amplifier VERY QUIET


take audio out from tv and insert it in aux in in your amp.

Jul 15, 2008 | NAD C320 2-Channel Amplifier

1 Answer

Amp wont switch off of stand-by


Both units have a problem with the output section. In case 1, the outputs are likely to be shorted. In case 2, the outputs are open. The low level and distortion come from you driving the speakers with the driver section of the amp. Both units will need to see a service provider.
Dan

Apr 11, 2008 | NAD C320 2-Channel Amplifier

1 Answer

Amplifier overheating and swtching of


You need to provide me the specs of your amp, your speakers. Impedance important. You are experiencing overload, overheating caused by overload. You have a wider frequency range using a mixer and that affects the output stage of your amp and can cause to fail.

I am from Yamaha service before and they have speakers that has 4-6Ohms impedance only. And you have to know your amp if capable of handling such low impedance. you may not have problem with the power but it should be impedance.

redrivera0314@yahoo.com

Mar 25, 2008 | NAD C320 2-Channel Amplifier

Not finding what you are looking for?
NAD C320 2-Channel Amplifier Logo

196 people viewed this question

Ask a Question

Usually answered in minutes!

Top NAD Amplifiers & Preamps Experts

 Grubhead
Grubhead

Level 3 Expert

4593 Answers

The Knight
The Knight

Level 3 Expert

68394 Answers

Larry Stiles
Larry Stiles

Level 2 Expert

286 Answers

Are you a NAD Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...