GREATER IN SPIRIT, LARGER THAN LIFE - For Professional Studios and Project Studios. This is the best valve condenser microphone under $1000. Great on your vocals and acoustic guitars. We love this microphone. The P820 Tube high-performance multi-pattern tube microphone is an excellent tool for highlighting lead vocals, brass instruments, electric guitars and drums. With its dual one-inch diaphragm capsule and the advanced ECC83 dual-triode circuitry, the P820 Tube delivers real tube sound and raises the bar in its class of affordable tube microphones.