Sennheiser HD 620S Portable Hybrid linear power supply with

Hybrid linear power supply with UPS using supercapacitors for safe shutdown

5mm headphone output

Includes a customized blue-filament black carbon fiber case large enough for your Prion4 and maybe a DAP and amp

Drive it from the Benchmark LA4 preamplifier for the ideal two-component speaker system

for a clearer sound at high volumes

Sennheiser HD 620S Portable Hybrid linear power supply withSennheiser's acclaimed HD 600 series takes a new direction with the HD 620S, bringing the lineage's signature midrange clarity and natural tonal balance to a closed back design built for listeners who need isolation without losing the HD 600 character. Type and Technology Over ear, closed back, dynamic. 42mm transducer with an angled driver positioning derived from Sennheiser's open back research. Handcrafted in Ireland. Sound Character Natural,