i’d get the one without bluetooth. i had one and the bluetooth just sucked and might have been the reason it had a hum idk. i dont think you can turn the bluetooth off. i have it built into my pc anyways
edit: get a good power supply too. stock one on all of those cheap tube amps blows. something like 12v 3.5a
i just realized i meant to use this as a preamp between your dac and amp. i thought i saw somewhere that you have an amp already.
Neither one is an OTL tube amp, so likely doesn’t require a traditionally ‘tube friendly’ headphone. With Hybrid, you still want to pay attention to the damping factor, matching higher output impedance of the amp with higher impedance headphones, but they essentially treat headphones the same way a solid state would since it’s a solid state output stage.
they won’t be $100…but on the used market they usually go for around $250, I think. sometimes lower if they don’t have both ear pads they came with out of box.
all that said though…I made that comment as Thotstomp and I have an ongoing thing about the NHC. I love mine so much and often recommend them in threads asking for questions. they are an extremely fun headphone!
I dunno what they go for in USD…but you might find the Senn HD599 or 599se (difference is color…ugly or black) and they do very well on a hybrid tube amp. used they go for $100 CAD, new I think they’re like $200 or so USD off Amazon.