Accu Box S2 is a power supply upgrade specifically for 18V phono preamps as well as Stream Box S2 Ultra. Any compatible piece of electronics will deliver more deliver more space around instruments with improved imaging. Sonics overall are cleaner and quieter with this PSU, delivering a relaxing yet 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, overcharge, over-discharge and over-current protections are implemented. For your convenience, Accu Box S2 also offers a 5V USB A output for other components such as DACs.

Additional information
Weight 0.545 kg
Dimensions 10.6 × 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