The LSD-2 is comprised of 2 separate dual-membrane solid state microphones contained within a single housing. Its capsules are mounted in close proximity on a vertical axis -- the upper capsule assembly having the ability to rotate 270 degrees horizontally, relative to the lower capsule. Two C&K 3-way switches control the polar response, high pass filtering and -10dB pad for each capsule (The switches on the front of the body correspond to the lower fixed capsule, while the switches 180 degrees opposite on the back of the mic control the rotating upper capsule). It is the combination of capsule articulation and independent pattern switching which allows a user of the LSD2 to achieve all manner of coincident pair stereophonic recording techniques. Due to the close proximity of the capsules, there is no phase cancellation resulting from time delay between the two signals. This translates into excellent mono compatibility.
The inner workings of the LSD-2 are essentially that of 2 Studio Projects Model C3 microphones. The capsules are 1.06 in. (27mm) diameter, dual membrane, Braunmuhl-Weber design. These are independently coupled through low-noise amplifiers based on FET driven discrete balanced output stages. The outer housing is plated brass with a single layer brass wire mesh grill surrounding the capsules.
Included with the LSD-2 microphone is a dedicated 7-pin XLR to dual 3-pin XLR 'Y' cable, magnum-sized foam windscreen, standard shockmount and carrying case.
Features:
Studio Quality Coincident Stereo Microphone
Twin Dual-Diaphragm Pressure Gradient Transducers
User Adjustable Stereo Image - Upper Capsule Rotates through 270 degrees
Individually Selectable Polar Response, Omni, Cardioid, Figure of Eight
Selectable -10dB pad/Hi-pass filter
Low Noise, Solid State Circuitry
Applications:
XY - Coincident Cardioids
Mid-Side Method
Stereosonic Technique (Blumlein)
Overhead Main Mic
Drums
Vocal, Voice-Over
Included Accessories:
Shock Mount Adapter
Foam Filter
Dedicated Cable
Case
Technical Info
Type: Stereo condenser microphone with vertically coincident 1.06 in. (27mm.) dual diaphragms
Polar Pattern: Cardioid, Omnidirectional, Figure of 8
Frequency Response: 30~20000Hz
Sensitivity: 12mV/Pa=-38dB(0dB=1V/Pa)
Output Impedance: <200 Ohm
Load Impedance: >1200 Ohm
Maximum SPL: 132/142dB SPL for 1% THD @1000Hz(0dB/-10dB pad, 0dB SPL=0.00002Pa)
Noise: (Line)---28 dB (A weighted)---18 dB-A
S/N: 76 dB
Power Requirement: 24v.-52.5v. phantom power
Current Consumption: 2.5mA
Circuit: JFET impedance converter, discrete balanced output
Connector: Gold-plated 7-pin XLR
Size: 2.1 in. (53.34mm.) dia.
Low Cut: 6dB/Octave at 150Hz
Pad: -10dB
Personal use items that are used at your mouth or in your ear cannot be returned once opened due to health laws. This includes all microphones, guitar talk boxes, ear plugs, and in-ear earphones. 
