Question about Now Hear This SA-2 Amplifier

Open Question

NHT SA-2 Amplifier Popping Noise

I have a NHT SA-2 amplifier hooked up to a NHT 10" subwoofer. Once the amp warms up I get loud popping noises coming from the subwoofer. Any advice is appreciated on what I need to do for trouble shooting this issue.

Posted by on

1 Suggested Answer

  • 56 Answers

SOURCE: I have a NHT SA-2

sounds like speaker is clipping (overdriving) put a meter onthe disconnected speaker and see what the resistance is,4 ohms ,8 ohms ,if the meter wont stay in one place (numbers changing constantly) you have a burnt or damaged coil in your sub, if that is not the problem change your RCA's cables to make sure it not a bad wire including speaker wires! GOOD LUCK

Posted on Jan 10, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Loud popping noise

Check the filter caps on power supply

May 16, 2013 | Audio Players & Recorders

1 Answer

Guitar amp with popping noise

yeah ,, the circuit controllong your volume controll.. the popping sound occurs when it just shorts out and when its totally shorted the volume drops and rises..

If you got eletronic experience you can
1.) open it up
2) look for a cracked circuit or broken solder if so re solder it
3.) test the capicators and resistors and transistors for a bad one ( a tran sistor was bad in mine)
4) check the ic for it being bad or loosing connectativity or if its defective...

More than likely it will be a transistor cause if it was any other part it would have not layed at all.. the ic can also cause it..

If you have any eletricial experience or a multimeter to follow the above instructions, take it to a technician..

Jan 05, 2008 | Audio Players & Recorders


Fixed amp won't turn on and click noise.

The amplifier would sometimes not turn on, when it did there was a loud click from one channel of the amplifier.


Inside the amplifier there is a protection board that plugs into the amplifier, the design uses 3 x 25V 47uF capacitors charged up by 22K and 220K resistors.
As the amplifier ages with time, a parasitic resistance across each capacitor gets less and less, this means that the capacitor can not charge fully up and reach thresholds, in the **** design of a delay circuit. The parasitic capacitance is affected by the room temperature making the fault intermittent.

The pop sound is caused by DC offset, it was 25mV, this was nulled using a trimmer on the amp pcb to stop the click-pop sound, this offset could of damaged a loudspeaker.

on Jan 14, 2016 | Marantz PM7200 2-Channel Amplifier

1 Answer

Gfa 545 output transistor replacement

first you break input signal from amplifier and boost up volume and see noise coming or not if not means u have preampfire section problem

May 17, 2012 | Adcom Audio Players & Recorders

1 Answer

My su-g95 technics Stereo integrated amplifier wont play any noise. and when i adjust the volume it makes a popping/crackling noise. i am 100% sure all the speakers were hooked up correctly.

Well it sounds like your amplifier IC's are working correctly since you are hearing that pop. I have the same amplifier and every 10db increment it pops. Have you tried every input? Possibly try starting at a low volume, plug an RCA plug into CD or any other input, and touch the center prong of the other end of the cable. You should get a 60hz hum if your in the USA, otherwise it will be 50-55hz. Regardless it should make noise.

Sep 29, 2011 | Technics SUV500 2-Channel Amplifier

1 Answer

My front left speaker began to make a loud noise after being on for about 10 minutes, getting worse. I swapped the speakers around and the sound stayed int hat channel. I disconnected that speaker and the...

i think there may be leaky capacitor in your amplifier. there is also chance of ic failure in the amplifier it may be producing noise after getting hot. open cover & carefully see if any capacitors(which are large & round one) are burst. check for excessive heat of the amplifier ICs. replace with same type if u find any of above capacitor or ic defective.

Sep 03, 2011 | Denon Audio Players & Recorders

2 Answers

When I power up my guitar amplifier if produces a loud hum through the speakers and then makes a loud intermittent popping noise, why?

your capacitors may be blown , if its a solid state amplifier ..

if its tube version (best) , you may have blown a tube

what model number is it , manufacturer ?

Oct 15, 2010 | Audio Players & Recorders

1 Answer

I use an azur intregrated amp 540A and a Azur Pre amp 640P. When first power up, The amp makes a popping sound and the volume turns down. Some times it can pop 2 or 3 times within a few minutes. Then it...

I've never repaired one of these but I have an amp at home that makes a intermittent static "popping" noise that i'm going to put down to a dirty volume pot (control) that needs cleaning. I will also have to change some of the electro capacitors that have dried up inside which cause "shot noise". With the right lubricant (electrical contact cleaner, nothing else) you could take to lid off and spray a small 1 second blast into the hole of the pot and any other balance or tone control yourself but I would take it to the electronics repairer to get the capacitors checked over.
My theory only
Good Luck!

Jan 17, 2010 | Cambridge Audio Azur 540A Amplifier

1 Answer

McIntosh MA6100 integrated Amp Phoho input crackiling

These units are capacitor coupled between stages. It sound to me like one or more of those caps are defective. There is an extra stage of amplification for the Phono inputs. Check the phono pre-amp section for defective caps. Dan

Jun 08, 2009 | Mcintosh MC602 2-Channel Amplifier

1 Answer

I have a NHT SA-2 Amplifier 1996 model year. Once unit warms up I get load poping noises from the subwoofer. Please advise what may be causing this to happen.

sounds like speaker is clipping (overdriving) put a meter onthe disconnected speaker and see what the resistance is,4 ohms ,8 ohms ,if the meter wont stay in one place (numbers changing constantly) you have a burnt or damaged coil in your sub, if that is not the problem change your RCA's cables to make sure it not a bad wire including speaker wires! GOOD LUCK

Dec 15, 2008 | Now Hear This SA-2 Amplifier

Not finding what you are looking for?
Now Hear This SA-2 Amplifier Logo

Related Topics:

598 people viewed this question

Ask a Question

Usually answered in minutes!

Top Now Hear This Audio Players & Recorders Experts


Level 3 Expert

98914 Answers


Level 3 Expert

4678 Answers

The Knight
The Knight

Level 3 Expert

69914 Answers

Are you a Now Hear This Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides