My first big piece of hardware was the Subsequent 37, and over the last year and a half, I’ve really come to love the thing. I wouldn’t call it bland at all, but rather “particular” or “not the classic Moog sound”. I think studiodc’s got it right, that the filter has a very particular character to it, and the whole thing is warmer than most, with the high end tapered off even when the filter is fully open (as compared to most analogue synths). For that reason, I was frustrated by it after a few months of owning it.
But I never sold it, and I’m back to being firmly in love with it, for a few reasons. First, it is just a lovely thing to tinker with, from its beautiful looks to its excellently laid out front panel to a keybed I like to play. Second, it is full of sweet spots and sounds great almost no matter where you’ve got it dialled in (contrast that to a number of synths I’ve had that have restricted ranges where they shine).
The biggest reason of all, though, is that I finally figured out what the Subsequent 37 was for when I started pairing it up with a loud setup. I was going to trade it for the Matriarch when it came out, but when I paired Matriarch and SS37 together, the SS37 cut perfectly as a lead overtop of the Matriarch, and sounded beautiful to boot. And then when I started jamming with an acoustic drummer, I tried one or two synths first, but quickly realized the SS37 was the best choice in a live setup, again because it was able to cut through and still sound warm. Plus, the multidrive, mixer drive, and pre-wired external drive give you a lot of harmonic flexibility that just works in these bigger setups.
So now I’m back to using it all the time. It doesn’t sound like a classic Moog, but that’s an advantage for a modern setup, and there are always classic-sounding units out there. For anybody considering the Subsequent 25 but not for space reasons, I’d strongly recommend picking up a Subsequent 37 for the more complete panel and extra octave range. In my opinion, it’s an underrated synth, especially if you have the privilege of not relying on it for all your synth sounds and can just let it be what it’s good at being.