Monolith by Monoprice THX AAA Balanced Headphone Amplifier featuring THX AAA 887 $399 (cheap and very good black velvet background- just nice warm sounding like WHAMMY or TCA or Gilmore)Įmotiva BasX A-100 Flex with jumpers activated for full headphone power $229 (gobs of raw power no real special sound except its fun to open the HD600 with this much raw power for cheap)īest Tube Under $1K for HD600 (or similar load) Neurochrome HP-1 Kit $500 (similar to DYNALO and TCA HPA-1) Rupert Neve Designs RNHP $499 (clinical gain power) Gilmore Lite Mk1 or Mk2 (Like a Dynalo) $300-499 (nice- a bit warm/clear for SS) TCA HPA-1 ( Tom Christiansen Audio ) $899 (warm and clinical but not like WHAMMY WHAMMY Class-A headphone amplifier w/ OPA2107 upgrade OR 2 OPA627 pro build ONLY $500-$600 PASS Design (similar to/ better than a dynalo- warm + clinical - choice of chip switches sound - these are two I like best- choices chips R infinite) Best SS Under $1K for HD600 (or similar load) _