This Module is currently available.
The RK2 XS-VCA is the ultimate vacuum-tube VCA. It isn't merely a tube VCA, in fact. It's also:
It can be set to simply be a plain vanilla VCA, with moderate tube distortion. Overdrive it for beautiful slow-onset clipping distortion. Or turn up the FEEDBACK control and beware.
What does it sound like? Imagine a slightly tubby tube amplifier, suddenly turning into a screaming chainsaw. And flying around the room to break your sappy bleeps and bloops. A bulldozer on fire crushing your nads. Strange tentacles of doom rise up from the bottom of the ocean and slap your sister's asscrack.
Or you can have anything in between. All voltage controllable with only one CV input.
Trigger and CV inputs have 100k ohm impedance. The maximum audio output is "hot" (up to +10 dBu) and able to drive a 600-ohm load. The CV input may be anywhere in the -10v to +10v range – the effective range is -2v to +10v. The RK2 is 8HP wide, protrudes behind the front panel no more than 1.5" (38mm), and the 15LE8 tube protrudes above the panel no more than 2.5" (63mm).
As with all Metasonix products, the RK2 is entirely handcrafted in California, from the best components available. Metasonix uses only "New Old Stock" premium tubes of American and European manufacture, and runs them conservatively for maximum lifetime..
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These merchants probably sell this module. Huh?