DIY Amplifiers --
The LM4702 meets Renesas Lateral MOSFETs:

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Click on the above GIF for a
larger and more clear image.

National recommends that you use
2 toroidal transformers and full wave
bridges for the positive and negative supply
rails and I won't quibble with them.
I  used 39,000uF/80V and 16 gauge wire
to make the power connections.

Suggested PCB Design - Top

Suggested PCB Design -- Bottom

Suggested PCB Design -- Silk

Playing
around with a proto-type -- one output
device per channel

First
Prototype using a pair of lateral MOSFET's
per side