5879

Miniature 9-pin sharp-cutoff voltage amplifier pentode designed specifically to exhibit exceptionally low audio hum, minimal leakage noise, and very low microphonics in low-level audio stages. Equivalents: 7199 (similar electrical family characteristics, requires different pinout wiring). Real-Life Examples: McIntosh C22 preamplifiers, vintage Ampeg guitar amplifiers, classic high-end studio microphone mixer modules.