X-R capsule stereo microphone bar


SKU: X-R-BAR Categories: ,

The stereo microphone bar is designed to work with the X-R remote microphone capsule system (female RCA capsules and male right-angle RCA cable connectors recommended).  The X-R capsules attach to the bar using the 1/4″ thread capsule mount.

The stereo microphone bar includes a stand-mount clip.

The stereo microphone bar can be customized for a variety of stereo microphone techniques.  The bar can have up to six 1/4″ thread studs, and can be sized up to 60cm.  This can enable several different stereo microphone techniques on a single bar.

Spacings for standard stereo microphone techniques:
  • 60cm, 50cm, 40cm: spaced omnidirectional capsules (AB)
  • 17cm: baffled omnidirectional capsules (Jecklin)
  • 11cm, 14cm, 24cm: near-coincident directional capsules (ORFT, DIN, NOS)
  • 6cm: coincident directional capsules (XY)

Note that directional capsules angled outward at 90° to 110° will have the capsules 6cm outside of the stud width.  Thus, the capsule spacing will be 17cm for ORTF, 20cm for DIN, and 30cm for NOS.  When angled inward, the studs are spaced 6cm apart for coincident capsules such that the capsules will be at 0cm for XY.

Narrower angles may be preferred when rejection of off-axis noise is critical.  Hypercardioid capsules may be indicated for that application.  With a capsule spacing of 60°, the actual capsule spacing will be 4cm wider than the selected stud spacing.

The hypercardioid or nearfield cardioid capsules may have inadequate low-frequency response for farfield recording.  This may be corrected by mixing an omnidirectional capsule with the acoustic lowpass filter using an RCA Y adaptor.  A male RCA cable connector is recommended to mount on the 1/4″ thread capsule mount when used with the Y adaptor; the capsule spacing with be 10cm wider than the stud spacing in this configuration.

Spacing for omnidirectional capsules should be at least 40cm, unless a baffle is placed in between to enhance directivity.  The equalization discs are recommended with omnidirectional capsules for enhancement of the stereo image, with the capsules angled 60° outward.  The equalization discs will yield a subcardioid pattern above 2kHz.

Table of stereo recording angles for various configurations:
 stud spacing cardioid
0°/60° with EQ disc
card. + LP omni. on Y adaptor hyper. + LP omni. on Y adaptor
 6cm (coin.)
nr/180°/170° nr/109°/89° nr/nr **146°/113°/99° **103°/78°/65°
151°/110°/96° 105°/89°/76° nr/nr 125°/99°/87° 92°/71°/60°
137°/101°/89° 98°/72°/61° nr/nr 114°/92°/82° 87°/67°/57°
24cm 103°/81°/73° 81°/61°/nr nr/125° 91°/75°/68° 73°/58°/nr
40cm 76°/nr/nr 62°/nr/nr 180°/86° 69°/nr/nr nr/nr/nr
50cm nr/nr/nr nr/nr/nr 180°/73° nr/nr/nr nr/nr/nr
60cm nr/nr/nr nr/nr/nr 118°/64° nr/nr/nr nr/nr/nr

“nr” = not recommended; standard methods italicized.

** angled outward for 16cm capsule spacing.

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