OK, so I supposedly have one of these RBX4 A2s on its way. I was looking at this page and was noting the little flash demo of how these things are built. I couldn't help but notice what looked like it would be a real problem with neck support in these skinned softwood bodies if there wasn't more to the mounting process than the animation indicated. Anyone have one of these long enough to comment on the long-term structural integrity of the neck/body joint? After having a v1.0 Italia Mondial (possibly the worst bass ever made) try to fold up and self-destruct at this point, I no longer take competent build engineering for granted. Thanks for any good data on this!
I was wondering kinda the same thing myself. The AIR technology, though serving weight reduction purposes excellently, just don't seem durable enough to me. I don't know, wood reacts strangely to climate changes, and the softwoods don't seem really dependable to me. Personally, I wouldn't risk it with the "softwood" bodies, although the sound and build seem quite good, and I was just a hair away from pulling the trigger on one... Time will tell!
I have had my 5-string since they first came out and have not had issues with the neck joint whatsoever. I also live in an area with very cold winters and hot summers and have never seen the neck flex away from or into the body. They seem pretty good to me and I think Yamaha puts more into their engineering than a lot of other companies so I tend to trust Yamaha. Just my $0.02 worth....
I tend to agree. Yamaha may have no mojo appeal, but they do seem to have engineering down. It's just the Flash demo seemed to indicate that the only real neck support was from the veneer, as the softwood core was not really structural -- presumably like balsa or styrofoam. It was also probably oversimplified for purposes of illustration. Anyone but Yamaha, I'd be really nervous with this, though.
Most of the info posted by Yamaha is in truth less than useful regarding this. However that is usually the case for anything that is considered a brochure. From the bits I have read across the Internet it seems balsa is the most likely culprit for the interior wood, or at least one of its cousins. When I look at my bass the body seems reinforced around the neck joint and feels sturdy so I think that they did their job in this area. They certainly did with the sound I tried an Italia last year and it felt cheap in a way the Yamaha doesn't, construction-wise. I opted not to buy it and went for the Yamaha instead.
The v1.0 Mondials simply self-destructed. Total garbage, incredibly stupid, unsound, crackhead structural misdesign. They apparently redesigned them and hopefully recontracted build.
I think if the core was balsa they'd be considerably lighter than the ones I've tried. Pine, Spruce, and Cedar as also softwoods and are heavier than Balsa.
I've also read these had balsa cores. True? I dunno. Balsa varies a lot in density and strength. It seems to me that the hardware on these looks pretty heavy, so that might be from where some of the weight's coming. I'll know when mine arrives, I suppose. [shrug]
A hair under EIGHT POUNDS, by accurate measurement. My original concern about structural integrity is unnecessary; the core wood is about as dense, heavy and hard as pine, and about the same color. I've seen entire bodies made of softer and probably lighter wood.
An office shipping scale that's properly calibrated in this weight range. Not that I needed much confirmation -- when I first picked it up I immediately knew it wasn't anywhere like the figures people have been mentioning. It simply wasn't particularly light. There's bound to be some weight variance from one bass to another, but I think some people are using the compensated bathroom scale method or something to come up with some of these lower figures.
Very True, as to a weight variances. I used the digital bathroom scale version along with a digital office scale from our shipping dept. Also tried a fishing scale but it wasn't incremented enough to really tell. All I could tell on it was it was right at 7lbs. The bathroom version (weigh yourself with the bass, then without and subtract) gave me 6 lbs 12ozs. My office scale gave me 6lbs 14 ozs, but like you said I knew mine was light when I picked it up. It's Significantly lighter than any of my others. I wish it was a tad heavier in the body as it doesn't quite balance the way I would like, but the sound and sustain is very nice on this one.
Just as an example of lighter instruments and different woods. I've DIY'd a P bass at just under 6 lbs and a J bass at just under 6.5 lbs. Both have bodies made of Paulownia wood.
I'm still sort of surprised that they didn't do tighter weight-grading on this material (whatever it is), though, considering the whole point of this bass was "revolutionary light weight." Considering the thinness of the body, any number of wood options would have accomplished the same thing with less rigmarole. I once had a discussion with a guy at FMIC who was trying to get the weight down on Fender's MIA "Nashville B-Bender," which is a prodigiously heavy Telecaster with the Parsons-Green device (here's my personal piece). They found that by using a premium lightweight poplar, they could consistently shave a pound off the body. Using something like this with the RBX series might have been a simpler solution.