Okay, show of hands what bands still play 7-string guitars? hmmm, as far as I know, the only band I can think of is Korn, and even then I don't know. Lets face it, 7-string guitars were a total novelty. Magazines and people started hailing as a new innovation, especially with all the new rap-core bands playing them. But....once these bands got a good amount of finances they jumped ship for much better quality 6 strings. Wes Borland, one of Ibanez's poster boys got himself a PRS, and 7-string guitars have vanished almost overnight from music store catalogues. I can imagine a lot of reasons for this, 1) A 7th string isn't very versatile for guitars, especially if its a low B. Aside from blues(which it was originally played for) and nu-metal, its kinda hard to find much use for it in conventional rock, gospel, jazz etc. I mean, my friend spend something like $800 on a Ibanez 7-string back in the day, he played it a couple of times and talked about how sweet it was, but a couple months later, the novelty wore off and he started complaining about how it got in the way. In addition, guitar amps aren't really suited to take the lower frequency, though I suppose this is a minor issue, the extra string would take a toll on the speakers of the amp. But I'm rambling. Basically what I was wondering about just this time, was, why do you think 7-strings faded off into obscurity while 5-,6-,7- ad infinitum string basses are still going strong? Personally I think it has to do with factors like the fact that low frequencies are the home of the bass, so an extra low string would open up a whole new barrel of monkeys for bottom-feeders to explore and also the extra string is useful for scales because you don't have to move your hand up and down the neck so much. Additionally, for those who want to go higher, the extra strings provide that as well. While guitars couldn't really make thinner strings, bass strings had room to spare. These are all my thoughts though, and I'd be interested in hearing what the other 5+ players at TB think about this? JT?