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As Flops said it, a 65 watt amp (8 Ohms) will give out 100 watts at 4 Ohm, that is how a good amplifier will behave. Similarly a very good amp of 100 watts will be giving out 170 watts at 4 Ohms. However the best amps actually double the output meaning 100 watts at 8 Ohms and 200 watts at 4 Ohms and have the capability of driving a 2 Ohm load giving an out put of 400 watts. These specs are generally for Solid State amps and there are exceptions as well.
Almost 70 to 80 percent of the amps grunt is required to reproduce bass, whereas no more than 5 percent is needed to reproduce the high frequencies. The balance required to drive the midrange.
All the speakers below 8 Ohms are current hungry and all the speakers above 8 Ohms are voltage hungry, this may explain why car speakers are generally specified at 4 Ohms.
A speaker specified as 15/16 Ohms will actually turn a 100 watt amp into a tiny 50 watter.
Chris, don't get carried away in the wattage game, REAL watts QUALITY watts cost a gread deal of money, I will not go into any more detail as I concur with what Flops has already said on this thread.
Almost 70 to 80 percent of the amps grunt is required to reproduce bass, whereas no more than 5 percent is needed to reproduce the high frequencies. The balance required to drive the midrange.
All the speakers below 8 Ohms are current hungry and all the speakers above 8 Ohms are voltage hungry, this may explain why car speakers are generally specified at 4 Ohms.
A speaker specified as 15/16 Ohms will actually turn a 100 watt amp into a tiny 50 watter.
Chris, don't get carried away in the wattage game, REAL watts QUALITY watts cost a gread deal of money, I will not go into any more detail as I concur with what Flops has already said on this thread.