Audio-Technica BP350ST-UL MS Stereo On-Camera Cardioid Condenser Boundary Microphone

Audio-Technica BP350ST-UL MS Stereo Shotgun Microphone

The Audio-Technica BP350ST-UL is a professional MS stereo shotgun microphone designed for broadcast, production, ENG, vlogging, camera-mounted recording, and field audio capture. Built for creators and audio professionals who need focused stereo sound in fast-moving environments, this compact microphone features a 6.3" interference tube that helps reject off-axis noise while focusing on distant sound sources. Its lightweight camera-mount design makes it a strong choice for run-and-gun filmmaking, live event coverage, interviews, documentary work, and location recording where mobility and accurate stereo imaging matter.

Using a mid-side stereo capsule configuration, the BP350ST-UL combines independent line-cardioid and figure-of-eight condenser elements to deliver crisp, clear, and well-balanced stereo response. The included AT8547 power module allows users to select wide left-right stereo, narrow left-right stereo, or discrete mid-side output for later adjustment in postproduction. This MS design helps capture natural depth while maintaining excellent mono compatibility, making it especially useful when audio may be edited, mixed, or collapsed into mono for broadcast and video workflows.

The BP350ST-UL is built for flexible camera and rig mounting. Its permanently attached microphone cable connects to the AT8547 power module, and the included AT8495 mount clip secures the microphone to the module while allowing angle adjustment around other camera peripherals. The power module can be placed in a camera microphone mount or secured with compatible third-party mounting hardware. For connection to camera stereo inputs or traditional microphone preamps, the system includes a 1.2' TA5F to dual-XLR3-M stereo output cable.

Designed for professional field use, the BP350ST-UL includes a switchable 80 Hz high-pass filter to help reduce unwanted low-frequency ambient noise. The package also includes an AT8180 foam windscreen, AT8495 mount clip, O-rings, microphone cable, and hard shell carry case for transport and protection. With high SPL handling, compact construction, and flexible stereo mode control, the BP350ST-UL provides a versatile stereo shotgun solution for demanding broadcast and production environments.

Key Features

• Small-format MS stereo shotgun microphone designed for broadcast, production, and field recording
• 6.3" camera-mount shotgun design is ideal for ENG, vlogging, and run-and-gun filmmaking
• Interference tube helps reject off-axis noise and focus on distant sound sources
• Independent line-cardioid and figure-of-eight condenser elements
• Mid-side stereo configuration provides natural stereo imaging and strong mono compatibility
• Switch-selectable stereo modes include wide left-right, narrow left-right, and discrete mid-side output
• Excellent channel separation and natural response, even at high SPL levels
• Included AT8547 power module provides mode selection and switchable 80 Hz high-pass filter
• AT8495 mount clip secures the microphone to the power module and allows flexible angle placement
• Power module can be mounted into a camera microphone mount or secured with third-party mounting hardware
• Compatible with most ATM350a mounts and mounting systems, available separately
• Includes stereo output cable, windscreen, mount clip, O-rings, microphone cable, and hard shell carry case

Technical Specifications

Microphone

Microphone Type: Boundary / Broadcast Array / Shotgun (Stereo)
Element Type: 2x Condenser; 1x Condenser (Cardioid); 1x Condenser (Bidirectional)
Element: Fixed-charge back plate, permanently polarized condenser
Polar Pattern: Cardioid / Figure-8; Line + Gradient / Figure-of-Eight
Sound Field: Stereo (Mid/Side Configuration)
Orientation: End Address
Circuitry: Solid-State

Controls & Filtering

Controls: Low Cut/HPF, Mode
Switches: Stereo mode selection (MS, LR-W, LR-N), Flat, Low Cut
Filter & EQ: High-Cut Filter: 80 Hz, 18 dB/Octave
Low Frequency Roll-Off: 80 Hz, 18 dB/Octave

Performance

Frequency Response: 40 Hz to 20 kHz
Maximum SPL: 148 dB (1 kHz at 1% THD, Mid Channel); 149.5 dB (1 kHz at 1% THD, Side Channel)
Maximum Input Sound Level: 144 dB SPL (1 kHz at 1% THD, Mid Channel); 149.5 dB SPL (1 kHz at 1% THD, Side Channel)
Sensitivity: 33.5 mV/Pa / -29.5 dB (0 dB = 1 V/Pa, 1 kHz, Mid); 17.8 mV/Pa / -35 dB (0 dB = 1 V/Pa, 1 kHz, Side); 15.9 mV/Pa / -36 dB (0 dB = 1 V/Pa, 1 kHz, Left and Right)
Open Circuit Sensitivity: MID: -29.5 dB (33.5 mV) (0 dB = 1 V/Pa, 1 kHz); SIDE: -35 dB (17.8 mV) (0 dB = 1 V/Pa, 1 kHz); L/R: -36 dB (15.9 mV) (0 dB = 1 V/Pa, 1 kHz)
Dynamic Range: 126 dB (1 kHz at Max SPL, Mid Channel); 125.5 dB (1 kHz at Max SPL, Side Channel)
Equivalent Noise Level: 76 dB (1 kHz at 1 Pa, A-Weighted, Mid Channel); 70 dB (1 kHz at 1 Pa, A-Weighted, Side Channel); 72 dB (1 kHz at 1 Pa, A-Weighted, Left and Right)
Signal-to-Noise Ratio: MID: 76 dB (1 kHz at 1 Pa, A-weighted); SIDE: 70 dB (1 kHz at 1 Pa, A-weighted); L/R: 72 dB (1 kHz at 1 Pa, A-weighted)
Impedance: 50 Ohms

Connectivity

Analog Output Connector: 1x TB5M/Mini-XLR 5-Pin Male (on Detachable Cable); 2x XLR 3-Pin Male (on Included Cable)
Output Connector: Power Module: 5-pin Mini XLR-M Type; Microphone: 5-pin Mini XLR-F Type
Inputs: 1x XLR 5-Pin Female (on Power Supply)
Cable Length: 25' (Control to Output); 1.2' (Mic to Control)
Cable: Main unit cable: 0.98'; Microphone cable: 1.2'

Power

Power Sources: Phantom Power
Operating Voltage: 48 V Phantom Power
Phantom Power Requirements: 48 V DC, 8.2 mA (both channels total)

Physical

Color: Black
Dimensions: 0.5" diameter x 6.3" L (Microphone); 0.83" diameter x 1.1" W x 4.9" L (Power Supply)
Weight: 1.5 oz (Microphone); 1.7 oz (Power Supply)

Environmental

Operating Temperature Range: 14°F to 140°F
Storage Temperature Range: -4°F to 140°F, 10% to 90% RH without condensation

Compatibility

Mount Compatibility: Compatible with most ATM350a mounts and mounting systems, available separately
Recommended Applications: Broadcast, production, field recording, ENG, camera-mounted recording, vlogging, documentary work, and run-and-gun filmmaking

What’s Included

• Audio-Technica BP350ST-UL MS Stereo Shotgun Microphone
• AT8547 power module
• AT8495 mount clip
• AT8180 foam windscreen
• O-rings x2
• 1.2' microphone cable
• TA5F to dual-XLR3-M stereo output cable
• Hard shell carry case