I got a really cheap China bass off ebay and I thought I'd let you all know how I made it sound more full real quick (I suppose this would work for any new plywood bass, or any bass for that matter). Since I live in the country, I was able to set my bass in front of my amp and adjust the volume to let it feedback at a moderate volume w/o anyone complaining. I let it do this all day while I was at work (Real musicians have day jobs) for a few days in a row and it really loosened that top right up. I got the idea from the little literature tag on a Seagull guitar that said you should let it sit right in front of a speaker for a while, which is a technique I suppose you could use if you don't have a pickup. I must have put a year+ worth of vibrations in the top in a matter of days!