The Sontronics STC-1S is a laboratory-matched pair of small-diaphragm condenser microphones designed for professional stereo recording applications. These pencil microphones feature a cardioid polar pattern and are engineered for precise stereo imaging across various recording scenarios. Each microphone measures 150 mm in length with a 20 mm diameter body, weighing 85 g per unit. The set includes comprehensive accessories: two shock mounts, two foam windscreens, and a durable aluminum storage case measuring 320 x 180 x 80 mm. Technical specifications include a frequency response range of 20 Hz to 20 kHz, maximum SPL of 138 dB with pad engaged, and self-noise of 14 dB-A. The microphones operate on standard 48V phantom power and feature three-stage attenuation switches offering 0, -10, and -20 dB settings, plus high-pass filter options at 80 Hz and 160 Hz. This matched pair excels in stereo recording techniques including XY, ORTF, and spaced pair configurations. The microphones are particularly suited for acoustic instruments such as guitars, pianos, and string ensembles, as well as drum overhead applications, choir recording, and room ambience capture. The brass construction with nickel plating ensures durability while maintaining precise acoustic performance. Optional OMNI and HYPER cardioid capsules are available to expand the system's versatility for different recording environments and applications.