Pearl Microphone Laboratory CT 40
Cardioid Tube Condenser Microphone
The CT 40 is a fixed-cardioid tube condenser microphone using Pearl’s trademark rectangular capsule.
Some disparity exists in the published specifications; the website claims a sensitivity of 28 mV/Pa, whereas a brochure gives a figure of 32 mV/Pa. Either way, this is among the more sensitive condensers we have seen.
The Model 2800 capsule is a dual-diaphragm model, using a diaphragm made of thin polyester metallized with vaporized aluminum. The membrane measures 14mm x 29mm, in a housing just slightly larger (17mm x 35mm). The membrane surface area is therefore 406 mm2, about 18% smaller than a typical “large-diaphragm” circular-capsule membrane (whose surface area measures 490mm).
Read more about the characteristics of rectangular diaphragm condenser capsules.
The amplifier circuit uses a Nuvistor tube. The output circuit is transformer-coupled.
The CT 40 ships with a dual-voltage power supply (model C4020), 10m 6-pin cable, elastic shockmount (model 1942), and a flight case.
The Pearl Microphone Laboratory CT 40 is also known as: CT40.
The mic was released in 2003.
Specifications
Pickup Patterns | Pads & Filters |
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Cardioid
(32 mV/Pa; 20 - 25,000 Hz) |
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Capsule Dimensions | Impedance | SPL/Noise |
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Diaphragm diameter: 14mm Capsule diameter: 29mm |
100 Ohms (Low) | Self-noise: 15.0 dB(A) |
Weight | Length | Max Diameter | Interface(s) |
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470g (16.58oz) | 160mm (6.30'') | 43mm (1.69'') |
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Power Specifications |
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