Should I use TL431 or a zener

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I have a Denon receiver and I would like to retrofit the amplifier section with a LM3886. I managed to blow the section when tweaking it. The supply voltage for the amplifier is at +-48 volt. I need to reduce it to +-35 volt for LM3886. Due to high current demand, LM317 is out of the question.
I intend to use a simple zener with a series pass transistor such as 2N3055 to drop the supply voltage. The other choice is to use TL431 and a pass transistor as demonstrated in National Semiconductor's datasheet.
Questions:
1. Is there a better way to reduce the supply voltage?
2. Will TL431 fit for this job? AT 35 volt, it is very close to its max rating. Can it drive 2N3055?
3. Why would I use TL431 if a 35 volt zener will work and without the additional resistor network for output sensing?
Appreciate any help.
Bing

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Topic - Should I use TL431 or a zener - houston99 07:47:43 01/21/04 (0)

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