CB 140/200/250

“IRT Cross“ Mounting Bars

Product is discontinued.
Alternatives: IRT 250


  • mounting bar
  • for ambience recording in 5.1 surround according to the "IRT cross" technique by Günther Theile
  • for 4 cardioids or supercardioids CCM/MK 4 or 41

Order number

  • No. 164001 CB 140 (for 4 supercardioids)
  • No. 164002 CB 200 (for 4 cardioids/supercardioids)
  • No. 164003 CB 250 (for 4 cardioids)


The mounting bar CB 140/200/250 has a 3/8" thread for stand mounting. The microphone holders for 8 mm correspond to the SGCM stand clamp.


The "IRT Cross" is a microphone setup for ambience recording. The 4 microphones are arranged in such a way that in pairs they produce an ORTF-like arrangement which has a recording angle of approximately 90°. This results in a uniform 360° image. Due to the distances between the microphones, the diffuse field correlation is low and thus very good spatial imaging is achieved.

The 4 signals of the IRT cross are discretely routed in 5.1 surround to L, R, LS, RS.

The IRT cross is an alternative to the mounting bar "ORTF Surround Bar LM" - but without multicore function.


CB 140, -200, -250


User guides, manuals

de | en
Schoeps Surround Microphones

stellt Surround-Techniken vor.

Helmut Wittek, 2012



Variants & Options


The number behind the CB indicates the spacing in mm in a microphone pair. The smallest bar CB 140 arranges each two supercardioids at a distance of 140 mm.

  • No. 164001: CB 140 (for 4 supercardioids)
  • No. 164002: CB 200 (for 4 kidneys / supercardioids)
  • No. 164003: CB 250 (for 4 cardioids)