Audio-Technica BP40

Large-diaphragm dynamic with a hypercardioid pattern for demanding broadcast environments

Best for: Broadcast and radio-style podcasters who want the noise rejection of a dynamic with more diaphragm surface than a standard moving coil

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The BP40 is a large-diaphragm hypercardioid dynamic microphone built for broadcast voice. It uses a 37mm moving-coil capsule on an internal flexible suspension for mechanical shock isolation, with a frequency response of 50 Hz to 16 kHz and a hypercardioid pattern providing deep off-axis null points at 120 and 240 degrees. A switchable 100 Hz low-frequency roll-off reduces rumble. No phantom power required.

Key features

Frequency response 50 Hz to 16 kHz
Large-diaphragm hypercardioid dynamic XLR, no phantom power required
37mm moving-coil capsule on internal flexible suspension
Switchable 100 Hz low-frequency roll-off
Output impedance 450 ohms, weight 632 g
Deep null points at 120 and 240 degrees off-axis

Our take

The BP40 is unusual - it gives you the noise rejection and simplicity of a dynamic microphone with a capsule size closer to a studio condenser. The hypercardioid pattern is tighter than the SM7B's supercardioid, which is a serious advantage in noisy or shared recording spaces. The trade-off is a narrower sweet spot - speaking off-axis drops the response noticeably. Technique matters. This is a professional tool that rewards disciplined mic work.