Its not MRS, its RMS and it stands for the continuous power rating of a speaker. A speaker with a 40 watt RMS can continuously play at 40 watts and remain within the limits of its Total Harmonic Distortion and performance limits. That doesn't mean the speaker can't handle short "bursts" of higher level power, just that it can't live there. Yes a 40watt RMS speaker will play just fine on a 75 watt RMS amp, until you turn the Gain up too far past the equivalent of 40 watts and leave it there. At that level, sooner or later, you will cook the speaker.
With respect to speaker size, base waves are much "wider" than mids or highs. (More bandwidth) When the sound travels to the speaker from the amp, the base signal moves the coil much farther in both directions than the mids or highs.Base tones require more speaker flex to be produced than mids or highs. They also require significantly more power than mids or highs. That's why the industry has moved to separating the base sound from the mids and highs. It requires exponentially more power for clean, intense base and removing the base allows the mids and highs to be much cleaner because much the smaller sound waves they produce sound better on cones that don't have nearly as much flex or surface area. That's one reason why you don't see 15" - 20" midrange speakers. (Unless it's a 100,000+ concert venue)
All other things being equal, a 6x9 will make "better" (as in cleaner) and more intense base sound than a 4x10 because the narrow side of the speaker is wider and can flex more. That's why dedicated sub-woofers are always round, equal cone travel around the whole speaker makes a cleaner wave. Any other shape, is a compromise, not an improvement.
With respect to speaker size, base waves are much "wider" than mids or highs. (More bandwidth) When the sound travels to the speaker from the amp, the base signal moves the coil much farther in both directions than the mids or highs.Base tones require more speaker flex to be produced than mids or highs. They also require significantly more power than mids or highs. That's why the industry has moved to separating the base sound from the mids and highs. It requires exponentially more power for clean, intense base and removing the base allows the mids and highs to be much cleaner because much the smaller sound waves they produce sound better on cones that don't have nearly as much flex or surface area. That's one reason why you don't see 15" - 20" midrange speakers. (Unless it's a 100,000+ concert venue)
All other things being equal, a 6x9 will make "better" (as in cleaner) and more intense base sound than a 4x10 because the narrow side of the speaker is wider and can flex more. That's why dedicated sub-woofers are always round, equal cone travel around the whole speaker makes a cleaner wave. Any other shape, is a compromise, not an improvement.
so does anyone have the Metra part number?
