Audio-Technica BP350ST-UB MS Stereo Clip-On Cardioid Condenser Boundary Microphone

Small-diaphragm Condenser M-S Stereo Microphone with Selectable Stereo Modes, Boundary Housing, Power Module, and Gooseneck Mount

Engineered for professional broadcast, production and field recording applications, the BP350ST-UB features independent cardioid and figure-of-eight elements configured in an MS (mid-side) arrangement with switch-selectable internal matrixing. The mic element can be mounted using either of the two included mounting solutions - a low-profile boundary housing and a 5" gooseneck with clip-on mount - to enable inconspicuous capture of true stereo sound.

The BP350ST-UB mid-side capsule arrangement provides crisp, clear, well-balanced stereo response, even at high SPLs. A switch on the included AT8547 power module allows users to choose between left-right stereo output (wide or narrow) and discrete mid-side signals for later manipulation. Mid-side operation offers many advantages for postproduction editing, making it easier to place voices naturally in a mix, for example, and providing audio that won't lose its depth when stereo channels are combined into a mono track. The two-mics-in-one configuration also helps reduce common problems with stereo miking, such as time alignment and comb filtering.

The BP350ST-UB's element is enclosed within the same compact body as our popular ATM350a instrument mic, allowing it to be used not only with the included boundary housing, gooseneck, and clip-on mount, but with any of our ATM350a mounts and mounting systems. The snap-on grille of the included boundary housing provides easy access to the mic, which locks securely into the boundary's base plate. The back of the plate is magnetized for easy mounting on metal surfaces and also includes four holes for screw-mounting. With the gooseneck and clip-on mount, the mic can quickly be positioned in any number of locations for ideal, close-to-the-action sound pickup. The AT8491UC clip-on mount includes a 1/4" camera thread for use with a tripod or other device.

The mic's permanently attached 7.6 m (25') cable is terminated with a TA5F connector that plugs into the power module. A switch on the power module allows users to select an 80 Hz high-pass filter to suppress unwanted ambient noise. The power module comes with a 36 cm (14.2") TA5F to dual-XLR3-M stereo cable that's suitable for connecting to any traditional mic preamplifier with phantom power.

Features

• Innovative small-format stereo microphone with MS (mid-side) capsule configuration engineered for broadcast, production and field recording
• Ideal for indoor/outdoor fixed sound recording of sporting events, press conferences, theater and studio productions, and documentary films
• Independent cardioid and figure-of-eight condenser elements
• Excellent channel separation and a natural response, even at high SPLs
• Switch-selectable internally matrixed stereo modes (wide and narrow) and mid-side mode
• Compact lightweight design
• Rugged AT8490 5" gooseneck keeps microphone accurately positioned
• AT8491UC universal clip-on mount provides safe and secure mounting to a host of surfaces via spring clip or 1/4"-20 thread mount
• In-line AT8547 power module is equipped with a switchable 80 Hz high-pass filter
• Compatible with all ATM350a mounts and mounting systems (available separately)
• Polar pattern can be changed to hypercardioid by using the optional UE-H element or to line-cardioid by using the optional UE-UL element together with the AT8180 windscreen (all sold separately)
• Includes a 36 cm (14.2") TA5F to dual-XLR3-M stereo output cable, AT8418 foam windscreen, and protective carrying case

Specifications

• Microphones
• Element: Fixed-charge back plate, permanently polarized condenser
• Polar Pattern: Cardioid, figure-of-eight
• Frequency Response: 40 to 20,000 Hz
• Low Frequency Roll Off: 80 Hz, 18 dB/octave
• Open Circuit Sensitivity:
  MID: -33.5 dB (21.1 mV) (0 dB=1 V/Pa, 1 kHz)
  SIDE: -35 dB (17.8 mV) (0 dB=1 V/Pa, 1 kHz)
  L/R: -39.5 dB (10.6 mV) (0 dB=1 V/Pa, 1 kHz)
• Impedance: 50 ohms
• Maximum Input Sound Level:
  MID: 148 dB SPL (1 kHz at 1% THD)
  SIDE: 149.5 dB SPL (1 kHz at 1% THD)
• Dynamic Range:
  MID: 126 dB (1 kHz at Max SPL)
  SIDE: 125.5 dB (1 kHz at Max SPL)
• Signal-to-Noise Ratio:
  MID: 72 dB (1 kHz at 1 Pa, A-weighted)
  SIDE: 70 dB (1 kHz at 1 Pa, A-weighted)
  L/R: 69 dB (1 kHz at 1 Pa, A-weighted)
• Phantom Power Requirements: 48 V DC, 8.2 mA (both channels total)
• Switches: Stereo mode selection (MS, LR-W, LR-N), Flat, Low cut
  Mounted on a power module (AT8547).
• Operation Temperature Range: -10°C (14°F) to 60°C (140°F)
• Storage Temperature Range: -20°C (-4°F) to 60°C (140°F), 10% to 90% RH (without condensation)
• Weight:
  Microphone: 17 g (0.60 oz)
  Power module: 49 g (1.7 oz)
  Boundary housing (AT8494): 87 g (3.1 oz)
• Cable:
  Main unit cable: 7.6 m (25')
  Microphone cable (included): 0.36 m (1.2')
• Dimensions:
  Microphone: 37.8 mm (1.5") long, 12.7 mm (0.50") maximum body diameter
  Power module: 125 mm (4.9") long, 21 mm (0.83") diameter, 28 mm (1.1") maximum width
• Output Connector:
  Power module: 5-pin mini XLR-M type
  Microphone: 5-pin mini XLR-F type
• Optional Interchangeable Elements: UE-H Hypercardioid, UE-UL Line + gradient
• Accessories Included:
  Power module (AT8547)
  Boundary housing (AT8494)
  Gooseneck (standard) (AT8490)
  Universal mount (AT8491UC)
  0.36 m (1.2') microphone cable
  Hard shell carry case
• Notes:
  Characteristic values measured when connected to an AT8547 power module.
  1 Pascal = 10 dynes/cm2 = 10 microbars = 94 dB SPL
  For product improvement, the product is subject to modification without notice.