Warm Audio WA-47, Large Diaphragm Tube Condenser Microphone, Based on the classic '47 microphone, 9-Way switchable polar pattern: cardioid, omnidirectional, eight + 6 intermediate stages, Output Transformer: TAB-Funkenwerk (AMI) USA, Vacuum tube: JJ Slovak 5751, Frequency range: 20 - 20,000 Hz, Dynamic range: 130 dB (A), Self-noise: 11 dB (A), Max. SPL: 140 dB (<0.5% THD), Output impedance: 200 ohms, S / N ratio: 82 dB (A), Incl. 7-pin Gotham cable, Elastic suspension, Including power supply, In wooden storage box, Dimensions (Ø x length): 90 x 254 mm, Weight: 4.1 kg