Does the humming stop when you touch the strings ?

EDIT: This is a guitar amplifier, correct? Does it have tremolo?

 

Yesa little bit...but the bass string when plucked it creates wierd sound..

 

Its a distorted sound on bass....and when i turn the bass nob high its worst...while other low strings giving pleasant and nice sound

 

A guitar amp speaker is not going to react well to low bass guitar notes unless you play at a LOW volume. Typically guitar amps have an open back cabinet in a relatively small enclosure so the lower bass notes will cancel and lower the apparent volume.
Bass amps always have a closed back cabinet to stop phase cancellation at low frequencies, among other things.

EDIT: I Googled the amp. It appears to have a closed back - That helps. But it's called a guitar amp.

I was typing during your last post. Be careful and turn down the BASS tone control. You may or may already have damaged the speaker, because it isn't intended to handle the lowest bass notes.

 

My amp is now in working condition i just changed the TDA2030A

But its humming...when i pluck bass strings...

Whats the reason?

Now I think I may have misunderstood your statement.
You were talking about the lowest strings on a guitar, correct?

 

I meant tht the sound it is producing was not like this before these problems occured

 

When the TDA2030 chip failed originally, it is very likely that it sent DC to the speaker for a period of time. This over-heats the speaker's voice coil which can damage the speaker by deforming the voice coil and causing it to rub inside the speaker magnet's gap. If DC continues long enough, the voice coil will burn open. That's one of the ways a speaker "blows".
Unfortunately, it appears you need a new speaker.

EDIT: Re-coning is a repair option for much larger pro speakers but is not cost-effective for this size speaker.

 

May i try this speaker with my music system to check if it has really gone?

 

What about humming stops when i touch strings...any way to get rid of it?

 

Is this possible that the TDA2030A is of low quality?

 

Important: First, measure the voltage across the speaker terminals with the amp on but not playing through it. It should be in the millivolts range if all is well.

May i try this speaker with my music system to check if it has really gone?

Yes, but do it carefully at LOW volume.

What about humming stops when i touch strings...any way to get rid of it?

That's normal sometimes. What model guitar do you have ?

 

Fernandes the function and yamaha erg 121

 

Don't know the Fernandes?
The Yamaha looks like it has 1 single-coil and 2-humbucker pickups..
Single coil pickups pickup external AC hum. It changes with the guitar's position.
What do you think hum-buckers might do ?

EDIT: Above I should have said measure the DC voltage across the speaker.

 

But when amp was original it didnt this much noise..

 

But when amp was original it didnt this much noise..

Are all connections back to normal?

Does the amp hum more now than it did before it quit with nothing connected to the input?

 

Yes it is fine when nothing connected...

 

Yes it is fine when nothing connected...

What brand of guitar cable are you using?

 

Originally Posted by aq_rules
"What about humming stops when i touch strings...any way to get rid of it?"



That's a good sign of a bad ground. Check your cable.......and your pickup grounding.

No, there should be zero difference, when you touch the strings. Or, not touch.

 

Cable...I had a bad ground in my 'Paul. Wire not connecting under the bridge.

 

The amp is now perfectly working. .The speaker was bad...no humming no buzzing anymore....thank you guys for your help...love you people