EBMM and Rickenbacker sell an awful lot of guitars. I’m not so sure about Carvin/Kiesel or G&L but I’ve certainly seen an awful lot of their guitars around, too. I suspect there are a lot more Warwick basses sold in the US than Framus guitars but I don’t know if that’s true in Europe. The bottom line is that there are far more guitarists than bassists so any company that’s known for making both is likely to sell more guitars. The only likely exceptions would be companies that started as bass manufacturers but also make a small number of guitars like Sadowsky, Elrick or Fodera. Heck, even Carl Thompson has made a few guitars but I don’t think anybody would categorize him as a guitar maker.
Clearly Alembic is way more in the bass world but like above post by The Owl, they do some pretty cool guitars. I would defer to the skinny 6 string folks on this but it doesn't seem to me that Series I or II electronics works as well on guitar as they do on bass. That said, the standard electronics on the Further and Tribute models look really cool. In the right hands I'm sure they sound amazing. Bones
Dingwall is definitely a bass focused company but if I'm not mistaken, there are some guitars out there. Bones
I think so? Wasn't it something like the "Wolfgang" model (named after his son)? Or maybe I'm thinking of Peavey? I dunno.
Personally, I only own 1 G&L guitar, but 3 G&L basses, and had another, so that's a 4:1 ratio for me. But I'm a bassist, not a guitarist, and I own like 15 basses and 1 guitar. OTOH, I've been on stage with far more G&L guitars over the years than I've seen other bassists with G&L basses. I'd say their guitars far outdo their basses in terms of sales.
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