I searched the forum and only found one mention of an aluminum necked bass (a Kramer), however, I thought because we're probably stuck at home with our basses and lots of time that I could give a little info on these if anyone was curious, some sound clips if people want, and etc., since they have made a big comeback in the last 10-15 years, especially in rock/metal/experimental circles. Not to mention, they're pretty dang rad.
I became enthralled with them after seeing Sumac (Aaron Turner of Isis [the band], Mamiffer, Old Man Gloom, etc. and Brian Cook, of Russian Circles, These Arms Are Snakes, Botch, etc.) a few years ago. Both Aaron (guitars) and Brian (bass) were using Electrical Guitar Company aluminum-necked instruments. Since I had a good job back then I put a deposit in with EGC, who were the company who got the ball rolling in the 00's, and promptly waited two years until the below bass came in early this past March.
The bass is is an aluminum core (neck through to the bridge) with an acrylic body. Schaller straplock buttons, two humbuckers, pickup switch on the lower horn, and tone and volume for each pickup, like a Rickenbacker. First thing to know about this bass, is its HEAVY. I would ballpark 14-15ish pounds, whereas my Distillate (pictured next to it) is probably around 11-12. Neck dive isn't too much of an issue, especially with the right strap.
The neck takes some getting used to, because it is always cool to the touch, but the profile (a thin-ish C) is quite comfortable. Being aluminum, it has no truss rod, and the bridge only requires adjustments if you changed the tuning wildly or string gauge - this is good for me, since I'm always quite hesitant to do adjustments on my basses, but, maybe I'll learn how to during this quarantine.
What this bass does well: it is clear, clear, clear. Not just talking about the body. Each note is crystal clear, and I can hear articulation I've never heard before. Tapping on this bass sounds like I've always wanted to. On the neck pickup, it is a crystal clear P bass type tone. On the bridge, it is reminiscent of a Rick - overdriven if you dig in, but it retains the low end stunningly well. On both pickups, it is clear and deep. Harmonics on it sound amazing.
There are a few more companies doing the aluminum neck thing. The big ones in the 70s and 80s were Travis Bean (of whom EGC is the "inheritor," since the original guy gave his blessing to use their designs and etc.) and Kramer. Nowadays the big aluminum names are Electrical Guitar Company, Robot Graves Industries, TTTides, Alef Guitars, Obstructures, etc.
Some famous aluminum-neck bassists: Brian Cook in Russian Circles and Sumac, Scott Shriner in Weezer, and Dominic Aitchison in Mogwai.
Adam