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Active Filter to Amplifier TDA2030

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.

Reply to
chauny.vq
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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

Reply to
martin griffith

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 board:one for high, one for midrange and 2 for subwoofer. Do you know the reason why? Thank you!

Reply to
Chauny

On a sunny day (6 Apr 2007 22:47:49 -0700) it happened snipped-for-privacy@gmail.com wrote in :

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'.

:-)

Reply to
Jan Panteltje

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.

--
"I\'m never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
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Reply to
Jamie

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

--
"I\'m never wrong, once i thought i was, but was mistaken"
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
Reply to
Jamie

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

Ed

Reply to
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

Reply to
martin griffith

Thanks, Martin. I missed that.

Ed

Reply to
ehsjr

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