Question about NAD C370 2-Channel Amplifier

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Loss of Bass

I turned my amp on today and all the bass seems to have gone from the sound reproduction. Altering the bass knob makes no discernable difference although treble does work. The only audi inputs I have are TV and CD, both of which are impacted. I have tried listening through the headphone socket and this is fine. Any help appreciated!

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Re: loss of Bass

Hi there, I would think that you have blown your bass drivers in the speakers. Sometime you may have a fuse which is blown in the speaker but this is not usual. Try on another speaker if you can.

Posted on Sep 26, 2007

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I just connected two sets of 901'a to Sansui G901 receiver. The sound is TINNY no bass at all. I've tried different connections and nothing seems to work. I've used two different EQ from bosse series

Either there is NO bass on the recordings (if you listen to it with headphones does it have bass?)'ve wired them out of phase. Connect only one(1) Bose 901's to just one side. Is there bass? Then connect the other side. IS there bass? If not reverse the phase (+ /- connections) and see if the bass comes back. Once that is done and there is BASS, then add the 3rd and then the 4th speaker. .Are you sure your Sansui can handle a lower than 4 ohm load???

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Carlsbro Bass Reactor 400 bass amp - power section dead

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But check for power supply and in the preamps also.

• A signal tracer will come in handy when troubleshooting these kind

of symptoms.

• Measure supply voltages,

• Check offset voltage

• Check idling current

Isolate , and trace afterwards.

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Even if you DID affect the recorded signals, WHY are you using such exaggerated settings? Or was it by mistake?

In theory, passing the modified output back through the same controls (set to Minimum this time) would undo most of the unwanted effect. Assuming their precise and mirror image for gain and loss.

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There are two possibilities.
Either your instruments's settings are all turned down with the exception of "bass" and this would affect the sound that way.

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Thanks for the answer - If we have 3 controls as Bass, Mid and Treble. If we keep those in 12 O Clock position, will the output level be equal. In using the Bass and Treble control only (if we have...

If all are in 12 o'clock position they are "flat" (nothing has been added or subtracted foam input signal) If you only have bass & treble, yes adjusting will affect "mids" but Mids change can go both ways dependent on increase or decrease of Bass and /or treble. By increasing bass you will pull some mids up also. By increasing treble you'll subtract some mids.

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How do I use this amplifier to amplify an ipod?

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Nad c370 problem....

Hi arda5
Did you try swapping speaker connections left for right on the back of the amp to isolate the problem. If the fault stays with the speaker, then that is where your problem is. Try this and get back to me here with the results.


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Hi gv6257

What sort of amp you play. I will help you sort it


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