KNARF XD :
the maximum volume, and power that it needs
higher wattage > higher max volume
This is, bascially, what wattage means, in reference to your original question.
musical marv :
Speaker wattage is defined as RMS which means Root Means Square which is how much the amplifier will put out per channel. 25 watts means 25 watts a channel.This is the pure wattage. Not peak which is a false wattage.4 ohm speaker needs less power than 8 ohm speaker.Usually most speakers are 8 ohms.Try buying a efficient speaker like a 4 ohm where the amplifier does not use that much wattage to play.
Yes, and no.
Buying a low impedance speaker isn't really a good idea, as the lower impedance also can cause excess noise to come through the speakers. Higher impedance speakers will actually deliver a clearer sound, even though they consume more electricity. About the only time you want to consider low impedance speakers is when you are doing things that require a lot of current, and higher volumes; think of bass competitions (ie: car sub woofers). For example, the
Kicker CompRT sub woofer will go as low as 1 ohm for impedance, but that's primarily to increase the maximum volume, and to help reduce the need for excess current to be drawn (not directly the intent, but you get the idea). I should also mention the CompRT has an RMS of 800 watts... so keep that in mind. Less power draw on the car means more volume at the same flow of current; and in a bass competition, that is always helpful to the owner of the car, as they are pushing extremely high volumes (enough to require specialty glass windows). Since the competitions aren't entirely scored on overall audio quality, there's no point in making the most absolute clear sounding speakers possible; the emphasis is on measured loudness, and performance at high volumes.
For a shelf system, lower impedance, at higher volumes, will be something that is pointless; the power draw at maximum volume, for up to 100 watts peak volume is low enough at 8 ohms that drawing less current is unnecessary. The units aren't designed to push a high volume to begin with, so running 4 ohm speakers is relatively pointless as it is.
Also, the RMS rating is not really the best number to use when building a sound system. To me, it seems like it's more along the lines of "how loud you can go before you start encountering some sort of distortion" than anything else; and that is kind of stretching the truth. Max output is what all of the musicians, and sound guys, that I do/have known personally, pay attention to, for many raesons. One of these reasons is fairly obvious; overloading your amplifier can cause it to overheat. If you run a 500w speaker to a 100w amplifier (for example), you run a risk of overheating, and various other issues; whereas overpowering your speaker is much easier to compensate with (reduce the gain, and your speaker will stay safe). While you shouldn't run a 100w max power speaker at 100w with the gain all the way open, you can safely run it on a 100+ watt channel, so long as you don't push the speaker beyond reasonable limits (ranging from enclosures, volume/gain, frequencies played at peak output, and so on). Yes, RMS will give you an idea of what limits you can push a speaker to, without problems, but it's definitely not something I've seen many people take too seriously. Most people who are actually going to build a sound system will tend to understand that there is a certain limit their speakers can handle, and they will typically respect that limit. The amount of real effort that goes into building a decent sounding system kind of prevents people from being too lazy, and screwing things up; not to mention, you'd practically have to be deaf to push your speakers to their peak limits, and think they sound "good." Seriously, pushing to the RMS only is just going to be more problematic than being careful, and running more powerful equipment.
Just clearing that up.
Pioneer isn't the same audio company that they used to be (especially with their car audio). Their speakers have gone down in quality over the years, and I would chalk it up to the marketplace as a whole. For small shelf systems, though, it's hard to go wrong with Pioneer. For the price, I would suggest looking around for some used/vintage Pioneer speakers, and a stereo receiver, so you could build your own system that will sound much warmer, and will have better overall performance. Just my personal take, though. You shouldn't have any problems with the newer Pioneer systems, though.
For about the same price of a typical shelf system, I can usually find older components that will give me a richer sound in the vintage/used marketplace (and a lot of the times it's locally). If you want the best sound for your money, you might want to consider that route.
/www.currys.ie/mobile/Product/pioneer-xsmc01btk-wireless-flat-panel-hifi-system-usb-connector/322081/188.2
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