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Definition of "model-2700":

Model 2700 is the name of the original rectangular condenser capsule design from Sweden’s Pearl Microphone Lab. When PML split into two companies in 1978, rights to the Model 2700 transferred to the new company, Milab. The Model 2700 capsule is still made by Milab today.

The capsule is a dual-diaphragm, dual-backplate design with outside dimensions 36mm x 19mm. Both membranes are thin polyester (Mylar), metallized with a layer of vaporized aluminum that is reportedly just a few atoms thick.

Aluminum is a lighter metal than gold, and is used here to improve the capsule’s transient response.

The rectangular capsule design is said to be superior to traditional round designs for the following reasons:

The narrow dimension of the capsule allows the microphone body and grille to be smaller than would a round-capsule large-diaphragm microphone.
The rectangular capsule does not produce the high-amplitude resonance peak in the midrange that all round large-diaphragm capsules do; peaks are lower in amplitude and higher in frequency, where they have less effect on the microphone’s sound.
The increased directionality of the rectangular capsule in the vertical plane allows for better rejection of unwanted sounds (assuming it is positioned advantageously).

Read more about the Milab Model 2700 capsule.

See also the Model 2900 capsule, which is identical in size to the 2700, but higher in sensitivity and lower in self-noise.

(This page formerly described the Model 2700 as a new, very long capsule developed in the 2000s by PML: a 75mm x 15mm capsule used in the ELM microphone series. This model is more commonly referred to as the “ELM capsule,” even within Pearl literature.)

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