Have been trying the new Tone Tubby Purple Haze in my MKIIA, Express 5:25 Plus and Marshall (in the MKIIA combo or similar cab). The more you play it, the more you can adjust the amp better. And some break in. My experience so far
> Mounted in my Boogie MKIIA combo cab. No amp chassis, no back panel. The quickest thing I had to try it out.
> Drive with MKIIA, in separate cab. Seems very bright. But responds well to amp controls and EQ, from very subdued to very bright/chimey. No ice pick. Does not seem put out much bass, but think related to the cab.
Does seem quick on attack.
> Driven with Boogie MKIIA, speaker and chassis in custom hardwood combo cab. Cleans are very nice. Lead channel (dirty) is OK, but seems something in the middle frequency range is missing. When I ran the Boogie MS-12 with the Purple, very nice.
> Driven with Boogie 5:25+ seems very good in clean and burn modes. Definitely brighter that the Cannabis Rex in the Express cab. Bass is less is some way (again could be the cab).
> Driven with Marshall 50W early PCB head. Really nice from clean up to some mild breakup. Using an attenuator to drive lots of distortion, seems to loose something similar to the MKII.
When (on any of the 3 amps) you get a little amp breakup and push the speaker a bit, very nice "something" - singing. With Marshall, reminded me of 1970's Charlie Daniels. They were supposed to be using Marshall amps and 2x12 cabs with JBLs.
After playing it more, the bass is improving. Tone Tubby said the quick attack and extended frequency response is similar to the K120 JBL. This speaker really responds uniquely to each amp. I think another cab would reveal more, by itself, and especially paired with a Red or ceramic Winterland.