Couple box multimpedenza

A special transformer can use this pair of speakers is a collagamento 8 Ohms standard lineee with constant voltage 100V. The rear dial to set the choice and assign the desired wattage of 2, 4, 8 and 16W.BS 54BT / WT in 1 m 1 watt hour of sound pressure level is 88 dbThe small voice pressure level is 2 W, Sound Pressure for level 91 dB (1 meter distance) Medium sound pressure level is 8 w, sound pressure level for 97 dB (1 meter distance) The most loudly pressure level is 16 w, sound pressure level for 100 dB (1 meter distance)