Specifications : ------------------------------------- Maximum output level : 25ohm load 775mW . 32ohm load 685mW . 50ohm load 530mW . 100ohm load 320mW . 600ohm load 60mW. Open circuit voltage 6V . Input impedance 20KOhm . Gain 28dB . Frequency response 12Hz to 37KHz . THD typically 0.003% . Signal to noise ratio referenced to max output level -100dB (22Hz – 22KHz) . Maximum Power requirements 24VAC at 225mA (685mW 32W).