| abid_rehan |
:) I have purchased a lots of TDA7294 chips to build a 5.1 amplifiers system that works with my creative SBLive 5.1 sound card, however, I am haivng trouble in putting up a decent Subwoofer amplifier can anyone suggets a schematic forbuilding a subwoofer amplifier with the same, schematics mentioned in the data sheet of the chips doesn't seem to work good, theres lot of oscillation.
Please help.
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| abid_rehan |
| I Have looked at the site and downloaded the PDF unfortunately it is in a language thats beyond my recognition, also schematic is not that different from that on data sheet can any1 else please help::smash: |
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| alfsch |
Hi,
1. are ps caps close to the chip
2. use zobel at output (0,1uf + 5 ohm or so)
i had no problems with these chips.
alf |
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| palesha |
| This has been discussed many times before. Many people hv built this on this forum. I don't understand why u only is not able to get it? |
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| abid_rehan |
| Well Thanxs Palesha, but certainly u don't expect a person who knows the technology as SUBWOOFER, and 5.1 digital decoding wont have datasheet of the IC, what I wanted was to have a custom designed circuit (A bridge may be) with amplification capability not across 20 Hz to 20KHZ, but with an effective range of may be 40 hz to 400 HZ. |
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| palesha |
| Subwoofer means it will normally cover from 20 or 30 hz to 100~150 hz depends upon the other speakers. U must first decide what speakers u r going to use for 5 channels? What will be their low frequency response & accordingly u hv to design subwoofer filter. Hope u understand this better than Mushrraf. |
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