Sennheiser SPB 8000 Stereo to 5.1 Mic Processor


ESFERA 5.1 surround system base processing unit, 19″ rackmountable (1RU) with network and mains cables

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The Sennheiser SPB 8000 processing unit converts stereo audio from the SPM 8000 XY microphone into a full 5.1 audio signal

The processing arm of the Esfera 5.1 surround miking system, the SPB 8000 is a 1U rackmount unit outfitted with Sennheiser’s proprietary processor chips that can convert the stereo audio signals captured by the SPM 8000 XY microphone via two standard cables into a full-fledged 5.1 surround experience at a sampling rate of 96kHz. For a broadcast-friendly output, the SPB 8000 features a built-in compressor. The SPB 8000 has the excellent audio quality you expect from Sennheiser, and is easily engaged via four selectable front-panel presets that can be customized for your most commonly used applications via a rear-panel Ethernet interface. The processor software allows you to individually define your surround soundscapes via PC interface.

Sennheiser SPB 8000 5.1 processor in one take:

  • Supplies microphones with 48V phantom power
  • Input switchable between analog and digital AES3 signals
  • Switchable compressor
  • 4 programmable presets for storage of 5.1 surround parameters
  • SPB 8000 adjustable via a web interface

If instantly phase-coherent surround audio captured with a stereo mic on a single standard mic stand sounds appealing to you, then talk to your Westlake Pro Sales Consultant today about hooking you up with an Esfera SPB 8000 and SPM 8000 XY microphone today.


Sennheiser SPB 8000 specifications:

Microphone input

  • Impedance: Approx. 4k ohm, balanced
  • Phantom power: 48V, switchable
  • Connection: 2 XLR-3F sockets, transformerless balanced

Power supply

  • Connector (Mains): 3-pin, protection class I as per IEC/EN 60320-1
  • Power consumption max: 15 W
  • Fuse: 115 V AC: T 160 mA L 250 V
  • Fuse: T 315 mA L 250 V
  • Voltage range: 115V~ / 230V~, 50/60Hz

Audio characteristics

  • THD, total harmonic distortion: 0.03% at 64dBu: gain: −12dBFS at 1kHz
  • THD, total harmonic distortion: 0.004% at 30dBu: gain: −12dBFS at 1kHz
  • Signal-to-noise ratio CCIR 468: –82.6 dB, 64 dB gain at 48 kHz sampling rate
  • CCIR 468: –106,1dB, 30dB gain at 48kHz sampling rate
  • Signal-to-noise ratio A-weighted: –85.5dB, 64dB gain at 48kHz sampling rate
  • A-weighted: –109.3dB, 30dB gain at 48kHz sampling rate
  • Signal-to-noise ratio Unweighted: –84dB, 64dB gain at 48kHz sampling rate
  • Unweighted: –104,3dB, 30dB gain at 48kHz sampling rate
  • Gain: +64dB (max.)
  • Dynamic range: 130.3dB, 30dB gain (A-weighted)
  • Crosstalk: –70dB at 10kHz (–30dBu input, 30dB gain)
  • Frequency response measured at AES3 Out ½ at 44.1kHz sampling rate: 10Hz-21kHz
  • Frequency response measured at AES3 Out ½ at 48kHz sampling rate: 10Hz-22.5kHz
  • Frequency response measured at AES3 Out ½ at 88.2kHz sampling rate: 10Hz-42kHz
  • Frequency response measured at AES3 Out ½ at 96 kHz sampling rate: 10Hz-45kHz

Digital input

  • AES3 standard: channels L/R
  • Connection: 1 XLR-3F socket

Digital output

  • AES3 standard channels: L/R, C/LFE, SL, SR
  • Sampling rates: 44.1/48/88.2/96 kHz
  • Bitrate: 24 bits
  • Format: professional
  • Connection: 3 x XLR-3M sockets


  • Communication: HTTP (POST request method), JSON-compliant
  • Ports: 80, 9050 with multicast
  • Connection: RJ 45 socket
  • Firmware update: via HTTP


  • Word clock: via Input socket B (BNC)
  • AES3 input clock: via In socket D (XLR-3F)

Dimensions (H x W x D)

  • Approx.: 1-11/16″ x 19″ x 9-8/16″ (44 x 482 x 240 mm)


Approx.: 8.6 lb. (3.9 kg)


What’s in the box?

  • 1 SPB 8000 processing unit
  • 3 mains cables (EU, UK and US version)
  • 1 network cable
  • 4 self-adhesive feet
  • 1 instruction manual

Additional information

Manufacturer Part Number



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