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OmnidirectionalCardioidHypercardioidBidirectionalWide CardioidPearl Microphone Laboratory DT 40

Multi-Pattern Tube Condenser Microphone

The DT 40 is a multipattern tube condenser microphone using Pearl’s trademark rectangular capsule. It shares a capsule design, body, tube, and circuitry with the single-pattern CT 40.

The rectangular capsule measures 17x35mm, with twin polyester diaphragms measuring 14x29mm. The diaphragms are metallized with a very thin coating of aluminum.

Read more about the properties and characteristics of the rectangular diaphragm.

The amplifier circuit uses a Nuvistor tube. The output circuit is transformer-coupled.

The DT 40 ships with a dual-voltage power supply (model D4020), 10m 7-pin cable, elastic shockmount (model 1942), and a flight case.

Note that the power supplies for the CT40 and DT40 differ, as the DT40 supply provides a pattern switch and requires a different cable.

Tape Op, 2005

As an engineer, you come off as a frickin’ genius when you use this mic, as it’s impossible to find something it sounds bad on.

The Pearl Microphone Laboratory DT 40 is also known as: DT40.

The mic was released in 2003.


Pickup Patterns Pads & Filters
Omnidirectional (20 mV/Pa; 20 - 25,000 Hz)
Cardioid (20 mV/Pa; 20 - 25,000 Hz)
Hypercardioid (20 mV/Pa; 20 - 25,000 Hz)
Bidirectional (20 mV/Pa; 20 - 25,000 Hz)
Wide Cardioid (20 mV/Pa; 20 - 25,000 Hz)
Capsule Dimensions Impedance SPL/Noise
Diaphragm diameter: 14mm
Capsule diameter: 29mm
100 Ohms (Low) Self-noise: 16.0 dB(A)
Weight Length Max Diameter Interface(s)
470g (16.58oz) 160mm (6.30'') 43mm (1.69'')
  • 3-pin XLR male (1)
Power Specifications
  • Includes tube power supply

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