Accu Box S2 is a power supply upgrade especially for 18V phono preamps as well as Stream Box S2 Ultra. Using Accu Box S2 with any of our recommended products results in a more homogeneous and spacious sound with better separation and imaging. Sonics overall are cleaner and quieter, delivering a relaxing but engaging listening experience. Accu Box S2 uses five cells or rechargeable Li-Pol batteries with a capacity of 2.6Ah. For protection of the batteries Accu Box S2 comes with overcharge, over-discharge and over-current protections to ensure maximum lifespan. Furthermore Accu Box S2 also offers a 5V USB A output for other products such as DACs.

Additional information
Weight0.545 kg
Dimensions10.6 × 10.3 × 3.7 cm



  • Superlative audiophile power transmission
  • Li-Ion Accu driven power supply
  • No disturbing interferences through mains
  • Perfect for all phono electronics
  • 1 x 18V output
  • 1 x 5V USB A output
  • LED indication for charging and mains
  • Full aluminium/metal casework
  • Available in black or silver
  • Handmade in Europe


  • Output voltage / current: 1x 18V/1A (2.5mm)
  • 1x 5V/1A (USB A)
  • Capacity: 2600mAh (Li-Ion batteries)
  • Charging time: 3 hours (outputs disabled)
  • External battery charger: 21V output

Privacy Preference Center