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MBL 9011 Reference Stereo/Mono Power Amplifier

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A technical masterpiece in the service of music. This high-end treat does not boast yet unheard-of measurement data; certainly not, it simply outdoes everything that was considered the best up until now.

The circuitry concepts developed by MBL, such as the DPP and IGC technologies, are combined here with a uniquely new circuit board design with ultra-short signal paths. Special low-induction components in the passive area make it possible to exploit the full bandwidth.

Special technical features:
  • Multi-layer PCB with heavy CU planes in the output section
  • Layout in Ground-plane and Eye-of-an-needle technique
  • Low-induction MPC resistors and MHz-type RSH capacitors
  • Super-fast ring-emitter transistors in X-crossed array
  • Regulated power supply for the Class-A drive electronics
  • and a few secrets that we would rather keep to ourselves.

Thanks to the uncompromising, balanced mono design, it was possible to eliminate virtually all sources of interference. Two complete power amplifiers inside the mbl 9011 keep the speaker under absolute control at all times. The input, a single balanced connector on the back, is connected in a purist direct way to the input difference amplifier using twisted 6N copper wiring.

As far as the sound is concerned, we wouldn't dare attempt to describe or classify it; after all, perfection is difficult to put into words


Pulse power (Mono/Stereo)- 5 000 / 2 400 W (2 Ω)
Musical power (Mono/Stereo)- 1 390 / 330 W (2 Ω) 840 / 210 W (4 Ω) 440 / 130 W (8 Ω)
Input impedance- 20 kΩ, XLR (Mono) 10 kΩ, RCA (Stereo)
Output current- Max. 50 ampere
Weight- 95 kg / 215 Ibs