The X-O was discontinued in November 2016.

The X-O is an omnidirectional condenser microphone built in a rugged case.  With a relaxed high-frequency response, it is intended for use in nearfield recording on a variety of sources.

The standard output version is suited for many sources as a general-purpose omnidirectional condenser microphone.  Recommended uses include acoustic guitars and string instruments.  The X-O standard output is available in singles or matched pairs.

The low output version is intended for use as a close mic on tom-toms, snare, and hand percussion, as a drum overhead mic, and also on brass instruments and electric instrument amplifiers. Its high SPL handling and low sensitivity allow use on loud sources without overloading preamplifiers.  As it is not intended for critical stereo recording, the low output version is not available in matched pairs.

X-O Specification:

Type: 10mm omnidirectional electret condenser microphone

Phantom Power: +12V to +48V
Current: 1.2mA

Output Impedance: 150Ω
Recommended Input Impedance: 1.5kΩ or higher

Sensitivity, 1kHz @ 94dBSPL, standard: -34dBV/Pa
Sensitivity, 1kHz @ 94dBSPL, low: -45dBV/Pa

Total Harmonic Distortion, 1kHz @ 94dBSPL: <0.1%
Maximum Level, standard, 1kHz @ 1% THD: 132dBSPL
Maximum Level, low, 1kHz @ 1% THD: 144dBSPL

Frequency Response (-3dB): 30Hz to 15kHz
Polar Response, 180°: -3dB @ 8kHz
Self-Noise, standard: 15dBA
Self-Noise, low: 27dBA

Weight: 51g (1.8oz)
Dimensions: 72mm x 19mmø (2 13/16″ x 3/4″ø)

2014 and earlier versions of the low output X-O had the following specifications:

Output Impedance, low: 280Ω
Sensitivity, 1kHz @ 94dBSPL, low: -52dBV/Pa
Maximum Level, low, 1kHz @ 1% THD: 132dBSPL
Self-Noise, low: 15dBA