Stereo Microphone Positioning System

Precision stereo microphone positioning made simple, reliable and repeatable

The Spacebar microphone positioner allows for precise and repeatable setting of microphone capsule spacing, angle of incidence, and rotation around the x axis. With precision scales for angle and distance engraved on the Spacebar components, it becomes easy to make perfectly measured and repeatable stereo microphone setups.

As well as being able to precisely set microphones in standard stereo configurations (i.e. XY, ORTF, NOS, and AB 50cm), the Spacebar allows for exact settings through the entire continuum of angle and spacing. This allows the user to adjust the stereo microphone array and tailor the pickup field to suit virtually any recording environment.

We highly recommend The Stereophonic Zoom by Michael Williams, a technical paper that provides detailed information on the relationship between angle of incidence, capsule spacing, and the effective angle of the recorded sound field. It is a very useful reference that can greatly increase the flexibility of your stereo microphone techniques. The Stereophonic Zoom can be downloaded from:

http://www.microphone-data.com/pdfs/Stereo%20zoom.pdf

The Spacebar system is precision fabricated from machined aircraft aluminum, brass, and stainless steel. Each system consists of a center stand clamp, horizontal bar, and microphone holders. The SB-30 and SB-66 are both supplied with two microphone holder assemblies and an additional tall microphone holder. The taller microphone holder body can be used to raise one microphone to avoid interference if the mic spacing requires that the microphone bodies overlap.

The Spacebar system comes in two versions – the SB-30 and the SB-66, which provide the following microphone spacing:

model	minimum spacing	maximum spacing
SB-30	7cm (2.75”)	26cm (10.2”)
SB-66	7cm (2.75”)	61cm (24”)

Also available is a hanging bar (SB-HB-30/66) for installations where the positioner is hung from above. This accessory consists of a tube which mounts to the center clamp through which the microphone cable is threaded. This enables the spacebar to be hung by the microphone cable and positioned via side mounted guide wires. See detailed photo here.

The Spacebar system is precision fabricated from machined aircraft aluminum, brass, and stainless steel. If properly cared for it will last a lifetime.

Surround Tree, Blumlien, Decca Tree and modular configurations are available here.

Purchase Spacebar systems and components directly from Grace Design, or from any authorized Grace Design Dealer

View / download Spacebar Owner's Manual Rev B

 

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Spacebar Configurations and Pricing
SB-30 30cm space bar kit		Includes 30cm bar, clamp, (2) standard mic holders and (1) tall mic holder		$295.00
SB-66 66cm space bar kit		Includes 66cm bar, clamp, (2) standard mic holders and (1) tall mic holder		$395.00
SB-30/66 30 & 66cm space bar kit		Includes (1) 30cm bar, (1) 66cm bar, clamp, (2) standard mic holders and (1) tall mic holder		$495.00
SB-HB-30/66		Hanging bar for SB-30/SB-66 kits		$100.00
SB-CMB		Center mount bridge for SB-30/SB-66 kits		$110.00
SB-CMB-BSW		This ‘BSW’ version provides 3/8-16threads. BSW is an abbreviation for British Standard Whitworth.		$110.00
mic holder assembly standard size		Complete standard height mic holder assembly for adding additional microphone positions to spacebar		$60.00
mic holder assembly tall size		Complete tall height mic holder assembly for adding additional microphone positions to spacebar		$65.00
5/8th jam nut		Locking nut for securing mic clips on the mic holder		$3.00
30cm bar		30cm horizontal bar with precision distance markings		$100.00
66cm bar		66cm horizontal bar with precision distance markings		$200.00
SB-30 case		Custom made soft carrying case for SB-30 Spacebar kit		$50.00
SB-30/66 case		Custom made soft carrying case for SB-30/66 Spacebar kit		$75.00

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