Active Filter to Amplifier TDA2030

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Hello people,

I made one filter board for low pass, band pass and high pass, it
wooks well. Then i made one amplifier circuit with TDA2030 for
subwoofer, midrange and tweeter. For midrange and tweeter i use one IC
TDA2030, but for subwoofer i use two TDA2030, The board wooks well
also. I connect two boards together, i can not receive good signal
from output of amplifier board. When i connect the every output of
filter board to low input of amplifier, the output of amplifier is
distortion, but i connect the every output of filter to mid and high
input of amplifier i can recieve good signal from output. one more
thing, i connect mid and high output of filter board to amplifier at
the same time, the output of amplifier is distortion.

Do anybody know what i am wrong?

Thank you.

 

[martin griffith]

On 6 Apr 2007 22:47:49 -0700, in sci.electronics.design

Hello people,

I made one filter board for low pass, band pass and high pass, it
wooks well. Then i made one amplifier circuit with TDA2030 for
subwoofer, midrange and tweeter. For midrange and tweeter i use one IC
TDA2030, but for subwoofer i use two TDA2030, The board wooks well
also. I connect two boards together, i can not receive good signal
from output of amplifier board. When i connect the every output of
filter board to low input of amplifier, the output of amplifier is
distortion, but i connect the every output of filter to mid and high
input of amplifier i can recieve good signal from output. one more
thing, i connect mid and high output of filter board to amplifier at
the same time, the output of amplifier is distortion.

Do anybody know what i am wrong?

Thank you.

How are you connecting the two tda2030s together for the subwoofer

If you post your circuit on a photo site, it would be helpful (for
example flckr)


martin

 

[Chauny]

On 6 Apr 2007 22:47:49 -0700, in sci.electronics.design

How are you connecting the two tda2030s together for the subwoofer

If you post your circuit on a photo site, it would be helpful (for
example flckr)

Thank for your reply, i follow figure17 page 6 of datasheet tda2030
http://www.ortodoxism.ro/datasheets/stmicroelectronics/1458.pdf

I connect midrandge output of filter to input of amplifier, the
midrange ouput of amplifier is good. i let it, then i connect high
output of filter to input of amplifier more, the good midrange output
change, it becomes bad. i use 4 tda2030 IC amplifier boardne for
high, one for midrange and 2 for subwoofer. Do you know the reason
why?
Thank you!

 

[Jan Panteltje]

Hello people,

I made one filter board for low pass, band pass and high pass, it
wooks well. Then i made one amplifier circuit with TDA2030 for
subwoofer, midrange and tweeter. For midrange and tweeter i use one IC
TDA2030, but for subwoofer i use two TDA2030, The board wooks well
also. I connect two boards together, i can not receive good signal
from output of amplifier board. When i connect the every output of
filter board to low input of amplifier, the output of amplifier is
distortion, but i connect the every output of filter to mid and high
input of amplifier i can recieve good signal from output. one more
thing, i connect mid and high output of filter board to amplifier at
the same time, the output of amplifier is distortion.

Do anybody know what i am wrong?

Thank you.

If the power amps are on the same supply, especially the ground
path becomes critical as high currents may go through the ground
of the low level inputs.
In your language: 'connect the other amplifier way the lead powers'.

 

[Jamie]

Hello people,

I made one filter board for low pass, band pass and high pass, it
wooks well. Then i made one amplifier circuit with TDA2030 for
subwoofer, midrange and tweeter. For midrange and tweeter i use one IC
TDA2030, but for subwoofer i use two TDA2030, The board wooks well
also. I connect two boards together, i can not receive good signal
from output of amplifier board. When i connect the every output of
filter board to low input of amplifier, the output of amplifier is
distortion, but i connect the every output of filter to mid and high
input of amplifier i can recieve good signal from output. one more
thing, i connect mid and high output of filter board to amplifier at
the same time, the output of amplifier is distortion.

Do anybody know what i am wrong?

Thank you.

If I understand your statement here? I guess my question is,
how are you joining the 2 TDA2030 for the Sub woofer? You do know
they need to be 180 degree's out of phase if you're doing bridged mode
output. Any other way, isn't going to work.

 

[Jamie]

Thank for your reply, i follow figure17 page 6 of datasheet tda2030
http://www.ortodoxism.ro/datasheets/stmicroelectronics/1458.pdf

I connect midrandge output of filter to input of amplifier, the
midrange ouput of amplifier is good. i let it, then i connect high
output of filter to input of amplifier more, the good midrange output
change, it becomes bad. i use 4 tda2030 IC amplifier boardne for
high, one for midrange and 2 for subwoofer. Do you know the reason
why?
Thank you!

I'm looking at that PDF. It shows using a +&- supply for the bridge
version. Are you using this or a single supply ?

 

[ehsjr]

Thank for your reply, i follow figure17 page 6 of datasheet tda2030
http://www.ortodoxism.ro/datasheets/stmicroelectronics/1458.pdf

The diagram there does not show the input to the TDA2030 on
the right. That may be your problem.

Ed

 

[martin griffith]

The diagram there does not show the input to the TDA2030 on
the right. That may be your problem.

Ed

R22,R7 attenuates the o/p of the LH TDA2030 into the inverting input
of the RH device. I would have taken the LHS of R5 to the signal
input C1


martin

 

[ehsjr]

R22,R7 attenuates the o/p of the LH TDA2030 into the inverting input
of the RH device. I would have taken the LHS of R5 to the signal
input C1


martin

Thanks, Martin. I missed that.

Ed