Solution for audio system in model A?

[Badpuppy]

Consider multiple speakers - 4 @ 4" speakers have the same area as one 8", and may be an easier fit. Use identical speakers - wire two pairs in parallel and connect the two pairs in series to get the same impedance.

https://www.jimkyle.com/wp-content/u...1/Sweet-16.pdf

(You will have to read it in English; Google can't translate .pdf's.}