Rode NTK Class A Large Diaphragm Tube Microphone (Open Box)   The RODE NTK is the multi award-winning Class-A tube microphone that has found a home with tens of thousands of professionals around the world. The heart of the NTK is the Australian designed and manufactured HF-2 capsule. The electronic circuitry complementing this very sensitive transducer includes a hand-selected twin-triode 6922 valve and audiophile grade components and lay-out. The result is an ultra-wide dynamic range, very low noise, and stunning tube warmth. The NTK's rich valve sound is ideal for vocals, acoustic instruments, drum overheads, guitar amps and pianos.   Large 1" (25mm) capsule with gold plated diaphragm Class "A" valve circuitry Hand selected and graded 6922 twin-triode valve Dedicated power supply Ultra low noise Wide dynamic range High strength heat treated steel mesh head Internal capsule shock mounting High level of RF rejection     Power Dedicated Power Supply (100 ~ 120V/200 ~ 240V, 50/60 Hz) Acoustic Principle Pressure gradient Directional Pattern Cardioid Frequency range 20 Hz - 20 kHz Output impedance 200Ω Signal noise ratio >82 dB (A - weighted per IEC651) Equivalent noise 12 dBA SPL (A - weighted per IEC651) Maximum SPL > 158dB SPL (@ 1kHz, 5% THD into 1KΩ load) Maximum output voltage +29dBu (@ 1kHz, 5% THD into 1KΩ load) Sensitivity -38dB re 1V/Pa (12mV @ 94dB SPL) +/-1dB @ 1kHz Weight 760gm Dimensions 208mmH x 55mmW x 55mmD