Hello fellow DIY-ers.   I'm a newbie to DIY and would be very appreciative of any assistance you could offer. My only prior build was a CMoyBB v2.03R (very pleased with it). Based on that successful build, I've decided to try my hand at the MiniMax.   I purchased the great kit from...

Now that there's a host of truly portable amps capable of driving any over-the-ear headphone (RSA Intruder, ALO Rx MK3-B, Portaphile 627, etc.), please tell me the gain-range arms race is over. Am I alone in thinking the true market demand for amps of this sort should be limited given that...