IRT Cross

Ambient/ Surround Recording Array: Mounting Bars for “IRT Cross“ CB 250, CB 200 The IRT microphone cross is an arrangement for ambient recording. Its primary characteristic is a transparent and spacious rendering of the acoustic environment. It is useful as a four-channel arrangement for room tone for example in combination with the OCT surround system (for more details please view PDF, chapter 3.1):

With certain restrictions the IRT microphone cross can also be used for full surround (e.g. 360° cinema sound recording or for other playback arrangements in which the speakers are placed in the four corners of a square).

The CB 250 is the version which more closely approximates the theoretical ideal, while the CB 200 is the original, somewhat smaller version.

		Distance between the microphones: CB 250: 25 cm CB 200: 20 cm CB 140 (version for supercardioids): 14 cm
IRT crosses CB 250, CB 200: 4× cardioids CCM 4/ CCM 4V or. MK 4/ MK 4V with Active KC Cable		Cross CB 140: 4x supercardioids CCM 41/ CCM 41V or MK 4/ MK 4V with Active KC Cable

　

CB 140

A modified form of IRT Cross exists for supercardioids as well. Since the distance between microphones is only 140 mm, the cross itself is distinctly smaller.

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