The ARRL has good handbooks on antennas. Antennas and loudspeaker systems behave very much alike. The really big engineer in the sky has done some very interesting and strange this in this universe. The business of antenna design borders on witchcraft. use test equipment! wishful thinking does...
this type of problem has arisen before. the solution is to use transformers. you make no mention if all the speakers are the same or what thier sensitivity is. do you have a impedance meter? using a 70 or 25 volt trans, then paralleling them, taking into account phase the load will be higher...
yes, you need to be more specific. audio covers underwater detection to ultrasound monitoring. the biggest problem is people don't want to pay you for the knowledge. they just see the stuff come out of a box from the orient at a low price without any thought as to what it took to get there...
the correct rating is contiuious sine wave power, into an appropriate load using 1KHz for music and 400Hz for speech. using load and scope set level to just below clipping, read RMS voltage. Hence E (volts,RMS) squared over Z (ohms), this gives you the power output. depending on the accuracy you...
