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Old 20th July 2005, 12:04 PM   #1
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Question TDA7293 as subwoofer amp ?


These ICīs, could they be used as a subwoofer amplifier ? I found a site with a schematic and decription of three of these paralelled so i was thinking of paralelling four to make it more symmetric.

What do you think ?
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Old 20th July 2005, 01:17 PM   #2
drbobee is offline drbobee  Hungary
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Good idea. The caracteristics of this IC are good for this job, but no use them 3 or more SIMPLY parralel !

So: take 4 chip combined parralel and bridgged mode.
Like this.

Click the image to open in full size.

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Old 20th July 2005, 01:47 PM   #3
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Cannot be done. The sub has two 4 ohm drivers so either 4 of these in paralell to drive 2 ohm or 2x2 to drive 2x4 ohms, 1x400 watts or 2x200 watts.
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Old 21st July 2005, 02:09 PM   #4
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Now i have bought these ICs, 10 on ebay for Ģ3 each. i hope they arrive next week so i can begin.
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Old 15th January 2006, 07:12 PM   #5
Nordic is offline Nordic  South Africa
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Got a broken Yamaha SW105 sub today, and guess what is inside... output side seems powered by a 100W transistor.
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Old 17th January 2006, 01:33 PM   #6
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the datasheet tell about paralleling several chips.see it,it got all.
Never Underestimate The Bandwidth of A Station Wagon Full Of Magnetic Tapes Hurtling Down The Highway...................Andrew S Tanenbaum
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Old 19th January 2006, 04:42 PM   #7
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Hum an old thread woken alive

If you donīt know already these ICs ended as the main amp in my stuff.
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