SPL vs Freq Graph

[Landlocked]

What does this graph tell me about the speakers? Good graph? Can anyone explain the graph.

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[FordaTaurusRex 10+ year member]

Well from my semi-limited knowledge, this graphs shows the exact frequency responce and where the speaker peaks at different frequencies.

Thats all a guess, seems logical to me though. lol.

 

[Cpyder 10+ year member]

Not much. When you put the actual speakers in your car the whole thing will change. It doesn't seem that flat of response to begin with. You want it to be perfectly flat once the speakers are in your car. Impossible, but something to aim for.

 

[FordaTaurusRex 10+ year member]

Was I close at all for a complete shot in the dark?

 

[Cpyder 10+ year member]

Pretty much right

 

[nauc 10+ year member]

the flatter the graph, the more accurate the reproduction/better sq. if it peaks big time on the right, means your highs will be LOUD, on the left, bass will be loud

 

[FordaTaurusRex 10+ year member]

Cool. One more thing i know now.

 

[audioholic 5,000+ posts]

Not much. When you put the actual speakers in your car the whole thing will change. It doesn't seem that flat of response to begin with. You want it to be perfectly flat once the speakers are in your car. Impossible, but something to aim for.

Not to mention placing the sub in an enclosure, or a different enclosure, will completely change the results of that graph.

 

[Cpyder 10+ year member]

the flatter the graph, the more accurate the reproduction/better sq. if it peaks big time on the right, means your highs will be LOUD, on the left, bass will be loud

In general it results in better SQ, but I don't think always. What if the speaker is playing all the right frequencies but is off on the pitches. Is that possible?

 

[Cpyder 10+ year member]

Which brings me to my next point that no amount of graphs or numbers can tell you what exactly what a speaker sounds like. They can help, but you have to hear it in person.

 

[Landlocked]

I agree the sound changes when installed sub added and all. But these graphs are at the least a good starting point I would think. At least you know if the speaker is excellent good or crap before installing it.

Are these the kinds of tests they run at competitions?

 

[squeak9798 5,000+ posts]

Which brings me to my next point that no amount of graphs or numbers can tell you what exactly what a speaker sounds like. They can help, but you have to hear it in person.

They could, if you had all the necessary measurements and appropriately interpreted them.

 

[squeak9798 5,000+ posts]

Are these the kinds of tests they run at competitions?

I don't know how all of the organizations do it, but IASCA and USAC used to have an RTA portion to their judging for sound quality competitions

 

[Cpyder 10+ year member]

Ya, why don't SQ competitions just rate based on flattest response?? Or do they?