To be honest Wes, if I go directly from the AC to the Caldera it takes my ears and brain a bit to adjust before the Caldera no longer sounds bass light. Granted the Violectric v550 has a more neutral bass response than what the Airmid can bring to the table when using the Tung Sol 5998 or Western Electric 421a, so that def plays a role in what I'm hearing too, but the AC is the ZMF you want if you're a basshead.Just when I had made up my mind to go with the Caldera as my next purchase, I read this post and now the AC is back at the top of my list. After reading your enthusiastic post one after the other about this headphone, and being a basshead/stage addict myself I have decided I just have to hear that bass, and staging asap. There's a good chance there will be an AC in my near future...
These tracks are fun as heck with my VC's by the way, and I really dig the track Photosynthesis by Carbon Based Lifeforms. Thanks for sharing!
The VC does do trance very well too, but the AC kicks the intensity up a notch. I also found that with the Western Electric 421a and Tung Sol 6J5 in the Airmid, the bass response out of the Burmese Teak(soft wood) pair I have here is actually too much for trance! The Thuya Burl pair I have tightens up the bass a bit, sounds snappier and a touch brighter overall, so to repeat what I said in my review, choose wood type wisely with the AC. Consider your DAC and amp and tubes in your system, and if you have a bass laden chain I'd recommend the hard wood AC.
Regardless, when I have the AC on my head and i'm listening to trance I get this stupid grin on my face knowing that what I'm hearing just cannot get any better.