top of page


Lawson L251 Capsule

The integrity of the capsule, more than any other element, determines the microphone's character as a transducer.


Lawson's L251 one-inch capsule design is based on the ELAM 251 (CK12) capsule originally manufactured by AKG for sale under the Telefunken name in 1959. The same capsule was also used in the AKG C12.

Lawson's L251 capsule features:

  • Assembled and hand-lapped in Lawson's machine shop located in Nashville TN

  • Critically tensioned with dual 3-micron diaphragms in the Lawson lab

  • Supported by Lawson's proprietary shock mounting system

  • Quick Change™-- May be used on Lawson TUBE or FET electronics

L251 Capsule

Lawson Quick Change™ System

Lawson capsules are universal or interchangeable. We call it the Quick Change™ system.


The L251 capsule will fit either the Lawson Vacuum Tube Electronics or the Lawson FET electronics. Here’s an example of how cool this feature is. If you have an L251 Tube Mic and an L47FET mic (check out the Lawson Tube/FET Combo), you can swap heads and voila! Now you have the L47MPII Vacuum Tube Mic and the L251 FET mic.


Here’s another scenario: purchase the L251 Quick Change Capsule, the L47MPII Quick Change Capsule, and one Lawson FET electronics. You can use either capsule on the FET electronics.

L251 Quick Change

Lawson Tube Electronics

To impart a warm, classic sound, the Lawson L251 microphone utilizes the 6n1P vacuum tube. Each tube is stringently tested and individually selected to meet low-noise guidelines.


To further insure highest performance and stability, an innovative, low loss tube socket is utilized employing NASA approved, heavily gold-plated beryllium copper contacts, resulting in unparalleled grip, low contact resistance, low noise and long life.


The vacuum tube is coupled through an esoteric capacitor and a Lundahl transformer.

L251 Tube Electronics

Lawson Tube Mic Power Supply

Infinitely Variable Multi-Pattern Control

Like the L47MPII, the L251 offers infinitely variable patterns that provide a wide pallet of character and utility. The pattern control is located on the power supply and adjusts very smoothly (similar to a volume control) without the limitations of preset switch positions. A blue LED inside the windscreen glows when the multi-pattern mode is selected via the switch in the mic base.

L251 Power Supply

Bass L251 (6 dB per octave rolloff at 100 Hz)/+Bass L47 (Flat)

The Lawson Tube Mic Power Supply is universal: It may be used with either the L251 or the L47MPII. The normal switch position for the L251 is the -Bass L251. The +Bass L47 position may be used with the L251 if you want more proximity effect.

0/-10 dB Pad

With the two position pad switch, zero or -10 dB of attenuation can be accessed. The -10 dB pad lowers the sensitivity of the vacuum tube allowing for increased SPL's when engaged. The -10 dB pad should only be used for extreme sound SPL's.

Multi-Pattern/Cardioid Only Switch

The L47MPII also features a cardioid only switch on the base of the microphone which disengages the multi-pattern function increasing gain by 3 dB and thereby lowering self-noise.

bottom of page