I have owned three Carvin basses, and still own a 7-string Carvin guitar. The basses were a B4 (that I believe I bought on this site) which was rather excellent, with a natural gloss ash body, and a lovely birdseye maple fingerboard, a J and MM pickup and passive electronics. The other two were LB75's, with that same pickup configuration but an active 3-band EQ. One was all black, and the other was natural walnut with a flamed walnut top. The black one was all stock, played nice, very versatile but a little dull (as in boring). The walnut one sounded a bit weak, and the previous owner had the neck sanded down to remove the gloss finish and a couple of mm of wood and I hated it.
I like Carvin as a brand, but I would never buy one new. Resale value is terrible. On the plus side, you can get a really nice used one for great prices. All three Carvin basses I owned cost me less than 500 euros (I believe the B4 was just 250 pounds even).