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Old 18th September 2017
  #4
Lives for gear
 

Current Soundfield mics are the SPS200( standalone mic that requires you to supply 4 channels of gain-matched preamp. A-format conversion to B-format and stereo/Surround in computer via software), ST-450 MKll (mic plus dedicated analog preamp/processor that
outputs B-Format plus stereo decode at line level plus headphone output. The stereo decode (line level and headphone)
can be adjusted continuously to any pattern from omni to fig 8 with stereo
angle continuously variable between 0 and 180 deg. The B-format can also be decoded with computer software to stereo/ surround. The highest quality
(quietest, best phase accuracy) are DSf-1 (and broadcast oriented DSF-B). Their dedicated preamp/processor uses digital processing that helps to give its superior
phase accuracy and quietness. The DSF-1 outputs B-format and a stereo decode
in AES digital plus a headphone output.
The preamp/processor can decode to stereo with the same flexibility as the ST450 plus you can virtually rotate the mic.
Unlike most AF condensers that are susceptible to popping noises in humid
environments, the ST450 and DSF mics
are relatively immune as they both have
heaters within the microphone.
I own a DSF-1 and the first version of the ST450 and am happy to answer questions.