Thread: How to efficiently reduce or remove hiss sound from speaker

The output of my amplifier produces a hiss sound from speaker. Can any one help me to remove this problem ? Is this the fault of amplifier or speaker or both ?

Thanks :)

Originally Posted by my_books

The output of my amplifier produces a hiss sound from speaker. Can any one help me to remove this problem ? Is this the fault of amplifier or speaker or both ?

Thanks :)

It is not the speakers causing this. Dou you have some pre-amplifier as well or amplifier only? Because amplifier should not cause audible hiss if designed properly.

You may have an defective ground plane on your amplifier or preamplifier.
You may have problem with leak field from transformer nearby.
Just analysing
Disconect de inputs and conect them to ground and track the signal with an osciloscope in the several stages.

Originally Posted by Ave_Rapina

You may have an defective ground plane on your amplifier or preamplifier.
You may have problem with leak field from transformer nearby.
Just analysing

That would cause hum (50/100Hz) but not hiss.

What kind of hiss
Describe more precice if possible.
What kind of amplifier are you using???

Originally Posted by sinip

Originally Posted by my_books

The output of my amplifier produces a hiss sound from speaker. Can any one help me to remove this problem ? Is this the fault of amplifier or speaker or both ?

Thanks :)

It is not the speakers causing this. Dou you have some pre-amplifier as well or amplifier only? Because amplifier should not cause audible hiss if designed properly.

Is combination of speaker and amplifier, High power amplifier as 200 Watt give more noise compare 20 Watt amplifier if this have same dynamic range.

or 200 Watt amplifier cost lot more money if you want same noise floor as good 20 Watt amplifier depend of need 10 dB more dynamic range compare to 20 Watt amplifier.

If you have high sensitivity loudspeakers (horn, 100 -105 dB/1W) coupled to low price amplifier (super market type) you have near guarante hiss from speaker, but couple to 'orginal' low sensitivity loudspeaker (80- 90 dB/1W), hiss level from speaker drown in room noise.

Hi,

we can tune out the hiss using filters...
can you post more details of your preamp and power amp?

Added after 4 minutes:

If possible isolate(shield) the amplifier from any nearby transformer from the power supply... (may be thats a cause of stray magnetic field from the transformer)