thanks for your very informative post.xmlguy wrote:Which is faster, a vehicle with an engine with 100HP, 200HP, or 4000HP?
What if I said the vehicles were a SportBike with 100HP, a 40 foot MotorHome with 200HP, or a TugBoat with 4000HP?
It's not the watts, it's what you do with them. In the case above, the best way to answer the question is to measure their top speed, not the HP of their engines. If I change the question to ask which is faster to tow a freighter out to sea, the right answer will change dramatically.
In the world of audio, watts are frequently misused and misinterpreted as a measure of loudness, even when comparing audio output systems with very different characteristics.
For example, 50W into a very efficient horn can be extremely loud, while 500W into a big, inefficient 18" bass direct radiator subwoofer might not be very loud at all.
A more appropriate measure of loudness is the Sound Pressure Level (SPL). Rather than getting into the specifics, which you can research elsewhere, lets just say that the 129dB Max SPL of the K10 is much louder than the 116dB of the StagePas 250M. The K10 is a much better speaker in nearly every other important respect too. The RCF Art is spec'd at 127dB. The SPL specs aren't the whole story, but they give a good clue to gauge the level of loudness you can expect. The RCF and K10 are indeed much closer to each other in performance than the StagePas 250M. The K10 will not sound more than twice as loud as the RCF, even though it has more than twice the amp watts. That doesn't make the StagePas a bad choice either, particularly if you want a mixer/speaker combo in a convenient portable package and don't need the volume put out by the K10 and RCF.
The best measure is to try them out if it at all possiblle in a store with your kind of music. Then try them in a gig. Mostly it will come down to what are your most important goals for buying the speakers. Personally, I would pick the K12s, since I've used them and they crank. I've heard both of the StagePas XXXM products, and the K series is much better IMO.
I love used gear, but the trick is to check out the gear carefully to be sure work it works right before commiting any cash.
Bi -amping allows for a better match between the amplifier and speaker, since the amp has only one speaker to drive. It also allows for an active crossover in front of the samp, Mono amps usually require a passive crossover between the amp and speakers.
i still have questions though.
the sales guy of the RCF told me that if i wanted a powered speaker to be used as a keyboard amp, i should use a compressor limiter pre amp so that it will preserve the life of the speaker? how true is this?
with regards to that, i noticed that the stagepas 250M has a built in compressor limiter.
the only thing that makes me think twice with the yamaha stagepas 250M is the fact that i already have a mixer. another mixer would be redundant.
also, what does it mean to have a class D power modules?
is it class A better? sorry for the newbie question.
