Earthworks logo
Shop all Earthworks

Earthworks QTC30 Omnidirectional Condenser Microphone

The QTC30 is a small-format omnidirectional condenser that delivers Earthworks reference accuracy where a slimmer mic is needed. Its ruler-flat 3 Hz to 30 kHz response is uniform across all frequencies, so nothing is exaggerated or attenuated, and its fast impulse response captures transients cleanly - ideal for acoustic instruments, piano, room, and measurement.

It shares the sensitivity and self-noise of the larger QTC bodies, handles 140 dB SPL, and runs on 24 to 48 V phantom over XLR. Offered as a single mic or a factory-matched pair for stereo capture that depends on two identical microphones - select above.

Transducer TypeCondenser
Polar PatternOmnidirectional
Frequency Response3 Hz - 30 kHz, +1/-3 dB
Sensitivity34 mV/Pa (-29 dBV/Pa)
Self-Noise20 dB SPL (A-weighted)
Maximum SPL140 dB
Power / Connector24 - 48 V phantom (10 mA); XLR