In fact there is no "8 ohm output" on an audio power amplifier and no Zout = Zin.
In audio technology voltage bridging is the normal connection method where Zout < Zin.
Read the link: "8 Ohm Output" and "150 Ohm Input" - What is that?
the watts for 2 ohms is more than 4 ohms. depending on the ohms your speakers take up and the wattage the speakers use, tells you what size amp you need.
no you dont There are a couple of options. you can buy a 2 chanel with 400W rms per chanel, or a mono at 800w. make sure you match the ohms of you speakers with you amp. If your amp is 800w rms at 2ohm, it's 400w rms at 4 ohms. So if your speakers are 4 ohms, they wouldn't be getting the power they need. And remember you can blow speakers by under powering them, but not by over powering them.
Depends on the amp and type of speakers brand and ratings would be nice info u also need to look at ohms of the amp and the speakers
yes you can you will have to wire up the speakers in parallel because with 8ohm it gives too much resistance and the amp will produce unwanted sound i.e. low volume.
It depends on the application. If you have an amp that is stable in 8 ohms per channel, then 8 ohm speakers will work best. However, if you wanted multiple speakers on that channel you could use two 16 ohm speakers.
The speaker will be fine and there will be little impact on its performance. In these situations, if there is a problem, it will be with the amp because that is what delivers the electrical current to the speaker. The situation you want to avoid is having speakers with a lower impedance connected to your amplifier. So you might have had a problem if your surround speakers were 4 ohms. However, as they have a higher impedance than the amp is set for, I wouldn't worry about it.
Don't know how you have subs wired but should be 4 ohm load is what your amp will see.
Not unless the speakers are rated at a resistance (ohms) that is incompatible with the amp. Speakers don't generate power, the rating only tells you how much they can handle. So, speakers capable of up to 270 watts, can certainly handle 125 watts. However, if the amp is not 1-ohm stable and the speakers are 1-ohm, you could cause the amp to cut out and overheat depending on the protection mechanism of the amp.
Two four ohm speakers in parallel is two ohms. Make sure the amp is rated for that load impedance, or you could damage it.
Sure, If you mean your stereo has 4 ohm output and using 16 ohm speakers. The volume will be reduced somewhat by doing this, but it won't harm the stereo. If you have 4 ohm speakers and stereo is designed for 16 ohms you can do it ,but the amp will run hot and you may suffer damage at high volume to the amp.
Your question doesn't fully make sense. Let me see if I can answer part of it. If your amp puts out 220 watts, the speakers should be rated for at least 220w, or they may be destroyed if you turn the amp all the way up. Watts are a measurement of power, in the case of speakers they are rated for how much power (watts) they can handle. Ohms is a different thing altogether. Ohms are a measurement of resistance to electrical flow. Amps are usually rated to work with certain impedance level speakers (4 ohm, 8ohm, 16ohm, etc.) the lower the ohms, the harder the amp works. I know it seems backwards but it isn't. each amp is different so you would have to read the amp's spec sheet to see what they reccomend. I have no idea what you are asking for with the "12 DC" thing.
There is no power amplifier with 8 Ohms output impedance. Therefore the usual impedance of this amp is arround 0.1 ohms which is good for bridging your 8 Ohm speakers. Scroll down to related links and look at "Interconnection of two units - Voltage Bridging - Zout < Zin".