Low-mass element for superb transient response.Low-profile design for optimal mic placement. New audio technica pro 37 condenser microphone pro37 drum. Corrosion-resistant contacts form gold-plated xlrm-type connector. Rugged design and construction for reliable performance. Fixed-charge back plate, permanently polarized condenser. 42 db (7.9 mv) re 1v at 1 pa. 141 db spl, 1 khz at 1% t. 112 db, 1 khz at max spl. 65 db, 1 khz at 1 pa.