




The QTC Series (Quiet Time Coherent) is designed for recording quieter sources such as vocals, strings and distant miked orchestras or choirs. These low-noise omnis are also an excellent choice for drum overheads, close-miked wind and percussion instruments. Earthworks’ reputation for realism is based on these distinctive omnis. Time Coherent Response means these models do not smear the time domain as most microphones do.
- With a frequency response to 40kHz and excellent impulse response, it will reproduce sounds with incredible detail that are true and life-like, making it an ideal and affordable choice for recording applications
- Perfect for recording the accuracy and full detail of instruments in the studio yet robust and subtle enough to record bird sounds in the jungle
- Intended for detailed sources
- Omnidirectional polar pattern
- Flat frequency response, fast impulse response and exceptional polar characteristics
- Accurate and uncolored
- Handles sound levels up to 142dB with no proximity effect or handling noise
- Requires 48V Phantom Power
QTC40 40kHz omnidirectional microphone for quiet sources
QTC40mp 40kHz omnidirectional microphone for quiet sources – matched pair
Polar Pattern: Omnidirectional
Sensitivity: 30mV/Pa (-30.5dBV/Pa)
Power Requirements: 48V Phantom, 10mA
Max Acoustic Input: 142dB SPL
Output: XLR (pin 2+)
Output Impedance: 100Ω, balanced (50Ω ea. pin 2 & 3)
Min Output Load: 600Ω between pins 2 & 3
Noise: 22dB SPL equivalent (A weighted)
24.5dB SPL (Unweighted)
Dimensions L x D: 229mm x 22mm (9 x .860 inches)
Weight: .5 lb. (225g)

Brass Instruments
Drum Overhead
Foley Recording
Percussion
Piano
Room/Ambient
String Instruments
Vocals
| MC1 | Standard microphone clip for all QTC Series microphones | ![]() |
| MC2 | Shock mount microphone clip for all QTC Series microphones | ![]() |
| LP1530 | LevelPad – switchable -15 or -30dB | |
| OMW1 | Foam teardrop windscreen for all QTC Series microphones | ![]() |
| OMW2 | 100 mile per hour foam windscreen for all QTC Series microphones | ![]() |
| OMW3 | Standard foam windscreen for all QTC Series microphones | ![]() |
| ECB1 | Cherry wood box for 2 microphones (QTC40, QTC50) | ![]() |
| EWB2 | Wood box for 1 microphone (QTC40, QTC50) | ![]() |
Other QTC Series Models
| QTC30 | 30kHz multi-purpose omni for quiet sources | Go | |
| QTC50 | 50kHz multi-purpose omni for quiet sources | Go |












