Outstanding Flexibility and Silence

be quiet! Dark Base cases provide unrivaled flexibility with impeccable cooling and silence features. This series was designed for high-end enthusiasts and individualists – all who expect the highest standards when it comes to modularity, compatibility and design for their high-end workstations and their overclocked and silent water-cooled systems.

The Dark Base cases have numerous modular options to satisfy every desire and lots of features that support special configurations. Aluminum and steel offer the highest stability with a look of extreme elegance. Simply an engineering work of art!

Dark Base 900 - Full Tower

Dark Base 700 - Midi Tower


  • Extremely versatile thanks to its modular construction, offering a relocatable motherboard tray with the possibility of an inverse layout and repositionable HDD slots
  • Up to three preinstalled Silent Wings 3 PWM fans with smooth-running 6-pole motors, fluid-dynamic bearings and funnel-shaped air inlets
  • Effective airflow system with innovative, noise-reducing vents
  • Completely sound insulated case with decoupled elements for motherboard, power supply and drives
  • Several areas are provided for water cooling radiators of up to 420mm
  • Window versions with advanced features such as a fully windowed side panel, PSU shroud, front USB 3.1 Type C Gen. 2, motherboard LED control and an integrated wireless charger
  • Product conception, design and quality control in Germany


Unrivaled Flexibility

  • Motherboard tray with enhanced possibilities to suit individual space requirements 
    • Completely relocatable and usable as a test bench
    • Optional installation alongside the left panel for an inverted layout
  • Repositionable HDD tray for individual space requirements inside the case
  • Up to E-ATX and XL-ATX  support permits usage of practically any motherboard
  • Numerous installation options for HDDs, SSDs and optical drives

Impeccable Cooling and Silence

  • Up to three Silent Wings 3 140mm PWM fans with airflow-optimized blades and virtually inaudible operation 
    • 6-pole fan motor for very low power consumption and less vibration
    • Fluid-dynamic bearing gives a super-long life span
    • Fan frame with funnel-shaped air inlets produces high air pressure
  • Intelligent airflow control with noise-dampened vents
  • Models are equipped with various fan controllers such as an advanced PWM hub, manual stepless or 3-step control for up to eight PWM  fans and a switch to choose between Silence and Performance modes
  • Installation of up to six additional 140mm fans or up to nine additional  120mm fans is possible
  • Ready for water cooling radiators up to 420mm
  • Built-in insulation in the front, top cover and side panels as well as decoupled motherboard tray, power supply and drive slots

Advanced Assembly and Handling

  • Generous space results from the repositionable single HDD slots
  • Customizable cable management thanks to carefully placed pass-throughs
  • Two cleanable dust filters that can be conveniently removed from the front
  • A PSU shroud and smart HDD slot covers provide a neat interior (window versions only)

High-Quality Materials and Elegant Design

  • Premium aluminum and aluminum surfaces
  • Steel parts from 0.8mm to 1.0mm for the highest stability
  • Compatibility with all be quiet! products and all available graphics cards
  • Series features models with internal and external RGB LED illumination
  • Possibility to synchronize the case illumination with additional LEDs or control the illumination via the motherboard 
  • Elegant side window of 4mm tinted and tempered glass

Outstanding Service and Support

  • 3-year manufacturer's warranty