Koss Drop ESP/95X with Dekoni Premium Earpads and STAX SRM-007tA/007tii
After endless capacitor changes (SonicCaps) and op-amp rolling (OPA627AU on Brown Dog Adapters), and adding a beefier 9VDC switching power supply, I’d scored a nice STAX 100VAC with North America 120/110VAC Step Down Transformer off of eBay for $500. What a huge step up ! The Koss Plastic box was never loud enough (not enough gain) and certain frequencies/musical passages would hurt my ears. These Cans are extremely resolving and feeding the Koss Box with a PS Audio DirectStream DAC sounded good but nowhere near the Koss/STAX/PS Audio combination. Lots of gain. All the frequencies/musical passages that hurt my ears were now gone. Endless amounts of midrange/treble sweetness on female vocals was achieved. Bass actually improved but don’t expect your face to get vibrations....LOL ! Any Hard Rock especially my 70’s Progressive Rock Torture Tracks played back with ease and never once did it irritate my hearing. When accidentally overdriven, the Amp rolls things off smoothly but better to reduce the level of your DAC.
The Dekoni Earpads while an absolute pain to attach was worth the grief. The comfort level far exceeded my expectations,
So trash the plastic box and score yourself a nice FET/Tube Hybrid like the STAX used to save yourself some bucks. You’ll never want to listen to your Speakers again !