Pop up sound when switching on/off amplifier(diy) tda7377 after connecting low pass filter into it..

Thread Starter

Jamsheer

Joined Feb 12, 2019
9
HI,
I HAVE MADE AN AMPLIFIER USING TDA 7377 .. I HAVE ADDED A LOW PASS FILTER INTO IT TO DRIVE ONE OF MY SUBWOOFER, BUT AFTER INSTALLING IT ALL WORKS FINE EXCEPT THE POP UP SOUND WHEN TURNING ON/OFF THE AMPLIFIER ...HOW TO SOLVE THIS PROBLEM...


------------- After Modified -------------
Hi,
I have made an amplifier using tda 7377 .. i have added a low pass filter into it to drive one of my subwoofer, but after installing it all works fine except the pop up sound when turning on/off the amplifier ...how to solve this problem...


Mods Note:
Please don't post all capital characters.
 
Last edited by a moderator:

bertus

Joined Apr 5, 2008
20,051
Hello,

Is your capslock key stuck?
All capital characters are like shouting.
Post the schematics and we can see what is going on.

Bertus
 

Thread Starter

Jamsheer

Joined Feb 12, 2019
9
sorry for the caps lock....
this is the circuit am using..
can anyone suggest me a lowpass filter suitable for this circuit
 

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Dodgydave

Joined Jun 22, 2012
8,389
Where is the full circuit with your low pass filter? Pin 7 is used to turn off/ mute the amplifier fast, by grounding it .
 

Thread Starter

Jamsheer

Joined Feb 12, 2019
9
Where is the full circuit with your low pass filter? Pin 7 is used to turn off/ mute the amplifier fast, by grounding it .
sir
where to connect the ST-BY pin..it is connected with switch or something...i dont know the working principle of ST BY ..
 

Dodgydave

Joined Jun 22, 2012
8,389
sir
where to connect the ST-BY pin..it is connected with switch or something...i dont know the working principle of ST BY ..
You switch pin 7 to Positive for Sound On, and switch it to Ground for sound Off.

Where is the low pass filter circuit?
 
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