9. What is the FT13’s maximum input power?

The FT13’s maximum input power is 500mW. At 1W input, the output exceeds 135dB SPL, which reaches the human ear’s pain threshold. According to NIOSH (U.S. National Institute for Occupational Safety and Health), continuous exposure above 94dB for one hour may cause hearing damage, and 127dB can cause damage within one second. Therefore, users are strongly advised to listen at moderate volumes to protect their hearing.