A0203/A0300 A0203 Alnico RoundDia: 70 mm, Height: 23.4 mmOutput: nom .4 watt and max .7 wattFrequency range: 350-5000 HzNet Weight: 47 g A0300 Alnico RoundDia: 77 mm, Height: 23.4 mmOutput: nom .4 watt and max .6 wattFrequency range: 250-10,000 HzNet weight: 47 g