I know weight is pretty much the primary point on this topic, however there's a few other things I'd bring up that are more subtle, but related points.
- Tubes are increasing in price and have become harder to source (or, quality ones at least). With an all-tube amp, this is obviously a factor. Plenty of folks grab older SVTs and never have tube issues from what I hear. If the amp itself needs service of some kind, there are numerous qualified techs who can work on an amp this ubiquitous.
- In a gigging situation, you'll have older connectors on an older SVT and 810 cab, so speakon and its more secure connection may not be available. 1/4" speaker cable can get pulled out much easier on a stage than speakon. Plenty of bassists seem to manage this scenario just fine, but I felt it worth mentioning.
- Not sure what flavor the gigs you're going to be playing are, but the dreaded moment when the Sound Tech brings a DI box instead of mic to you can be pretty compelling. Sure, stage volume and monitoring is great with a rig that large, but if it's bleeding over into drum or other mics on stage you may be asked to turn down...thus negating the vibe.
The gigs I was playing weren't justifying an all-tube head that large. I grabbed a Traynor YBA200 (had the DI out on it) and a Kasino 2x15s cab, it was less of a heft than the SVT and 810. Tone was very good, not the same though. The majority of the time, Sound Tech wants the DI to be pre-EQ anyways. So the big rig haul felt increasingly futile for me.
I experimented with some rack rigs (Tech 21 RPM + power amp), preamp into bass amp (Tech 21 VT Bass Deluxe + Carvin BX500), and then landed on my current "big rig" which is a GK 700RB-II with either Avatar neo 2x10 or 2x12. Some pedals on the front-end can give me great sizzle if I so desire. Plenty of times I just brought the GK head and my pedalboard, utilizing the PA for gigs.
If you like the sound, there's no real substitute for it. But that might not be the tone that's coming out of the PA and into your monitors at many gigs. If it gets you inspired and pumped to just hear it on stage, go for it. The important thing is you have the Markbass rig in case it's not an SVT-worthy gig. Never hurts to have the SVT on hand though, does it?
