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Audio-Technica AT4051B

The AT4051b is a modular small-diaphragm cardioid condenser built for professional recording and critical broadcast work. It pairs the AT4900b-48 body with an interchangeable cardioid head capsule, and direct-coupled balanced output gives it precise, transparent sound.

Small-diaphragm cardioids excel on overheads, acoustic instruments, and anywhere accurate transient response is essential. It handles up to 146 dB SPL, with a 10 dB pad extending that to 155 dB. Because the body accepts omnidirectional and hypercardioid capsules as well, one investment can grow into a three-pattern set. It runs on 48V phantom power over a 3-pin XLR output.

ElementFixed-charge condenser, modular (small diaphragm)
Polar PatternCardioid
Frequency Response20–20,000 Hz
Impedance50 Ω
Max SPL146 dB SPL (155 dB with 10 dB pad)
Phantom Power48V DC
SystemAT4900b-48 body + AT4051b-EL capsule
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