I'm no wood finishing expert but I prefer natural Watco Danish oil and a hand rubbed wax finish. There are lots of techniques for applying this stuff and they all require a fair bit elbow grease & time but it's foolproof - just what a fool like me needs.

For my speakers (behind amps in pic, cherry veneer), I rubbed in about 6 coats of oil by wet sanding - starting with 200 grit and working up to 800. I soaked the wood and kept the paper clean and wet, let dry for maybe 20 minutes, rubbed off the access and let dry overnight before the next coat. To seal things a little I rubbed in a few coats of Watco's satin finishing wax.

On the amp bases (South American mahogany) I used the same oil technique but tried Goddards furniture polish for the final finish - a little glossier and really brought out the depth of the grain. One thing to point out here, the Watco natural oil color has an orangey hue on some woods and may not be to your liking - definitely try it on some scrap first to make sure you don't make a very large mistake.

Billfort