TDA7294 in BTL

ruferto · 25th January 2011, 08:18 PM

I have build one 4x TDA7294 in BTL mode to use in a sub, but i saw this in the tda datasheet .
My question is: is it any good for a subwoofer amp?

Best regards,
RUF

madtecchy · 25th January 2011, 08:46 PM

Do you have any problem with the sound from it ??

ruferto · 25th January 2011, 09:06 PM

No, only 50hz noise because of the bad psu, only TR+Caps.
But can it reach the 18HZ for example?
Is it strong enough to say "stop" a the Sub "stop"

regards,
Ruf

norture · 26th January 2011, 02:14 AM

Quote:

Originally Posted by ruferto

No, only 50hz noise because of the bad psu, only TR+Caps.
But can it reach the 18HZ for example?
Is it strong enough to say "stop" a the Sub "stop"

regards,
Ruf

Well, for a start, have you got an appropriate sub for that 18Hz freq? It has to be big to handle such low frequency, though. The IC can surely handle sub-20Hz input signals. Regarding its power, I think 4xTDA7294 will shake your feet off the ground. LOL!

ruferto · 26th January 2011, 08:27 AM

I have for now one peerless xls10 in a sealed cab. but a think i am going to try or in TH or PASSIVE enclosure.
there are so many thoughts and one of them is, as i have one big 500va 2X25V~ i was thinking of buy another one and make one amp for 2 subs.
But i was not sure of the SUBwoofer capabilities of the amp.

regards,
RUF

abraxalito · 26th January 2011, 09:04 AM

It'll work fine for sub duty - you just will want to ensure the bootstrap capacitor is big enough to get good LF performance. Oh, and the drive unit would want to be an 8R type to get the most out of bridged mode.

ruferto · 26th January 2011, 12:19 PM

thank you.

I think i am going to buy one xlsp for my sub.

best regards,
RUF

26th January 2011, 09:04 AM	#6
abraxalito diyAudio Member Join Date: Sep 2007 Location: Hangzhou - Marco Polo's 'most beautiful city'. 700yrs is a long time though... Blog Entries: 46	It'll work fine for sub duty - you just will want to ensure the bootstrap capacitor is big enough to get good LF performance. Oh, and the drive unit would want to be an 8R type to get the most out of bridged mode. __________________ I think ideas are what you want to get rid of. I don't really like songs with ideas. - Leonard Cohen

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25th January 2011, 08:46 PM	#2
madtecchy diyAudio Member Join Date: Dec 2010 Location: wigan	Do you have any problem with the sound from it ??

25th January 2011, 09:06 PM	#3
ruferto diyAudio Member Join Date: Oct 2004	No, only 50hz noise because of the bad psu, only TR+Caps. But can it reach the 18HZ for example? Is it strong enough to say "stop" a the Sub "stop" regards, Ruf

26th January 2011, 08:27 AM	#5
ruferto diyAudio Member Join Date: Oct 2004	I have for now one peerless xls10 in a sealed cab. but a think i am going to try or in TH or PASSIVE enclosure. there are so many thoughts and one of them is, as i have one big 500va 2X25V~ i was thinking of buy another one and make one amp for 2 subs. But i was not sure of the SUBwoofer capabilities of the amp. regards, RUF

26th January 2011, 12:19 PM	#7
ruferto diyAudio Member Join Date: Oct 2004	thank you. I think i am going to buy one xlsp for my sub. best regards, RUF

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