That makes sense on the voltage/current relationship and why the Caldera Open, and some other planars I own, sound so nice to me on the Icon Audio HP8 (transformer-coupled tube amp) vs an OTL. I did put in an order for a CSP3 directly with Decware in early 2022 just before Zach did the collaboration. I'm sticking with the order despite what is looking like a 2.5 year wait . Whew! It's the longest order time I will ever do again but I know it'll be lovely with the ZMF dynamics when it finally arrives.I wouldn't say seriously underpowered as a whole, just not powerful enough to run planars. OTLs are voltage machines and drive high impedance dynamics with ease. Planars and their current thirst takes transformers or solid state circuits to adequately power to their full potential. But for those with dynamic driver headphones, power will not be an issue with the Decware.
I do agree the Pendant is an outstanding amp. I've owned both the first and second gen variants and loved them both. I had noise issues which is why I sold them, but from a versatility and sonics standpoint, they're excellent. I've yet to hear the ZMF version of the Decware, but I have heard regular CSP2 and CSP3 models, which the ZMF is based on, and I'd take it over the Pendant easily. And those were the basic models, not Zach's ultra upgraded version. There's a purity of tone with a good OTL that's tough to replicate with SET amps. If only listening to dynamic drivers, I even prefer the basic Woo WA3 OTL to the Pendants. If there's also planars in your lineup then I'd say yeah just run a Pendant and be done with it.
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