IMAGE  MODEL THROAT SIZE IMPEDENCE SENSITIVITY SPECS  APT:50  1", 25.4mm  8 ohms  105dB  ASD:1001  1", 25.4mm  8 ohms  105dB  NSD:2005  1", 25.4mm  8 or 16 ohms  111dB  PSD:2002  1", 25.4mm  8 or 16 ohms*  105dB  PSD:3006  2" 50.8mm  8 ohms  111.4dB (@1W/1m across 500Hz-18kHz)