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Noob Question

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David87965

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- CEA Rated: 300W (1.0% THD+N) (4Ohm/1Ch) (20 - 200Hz
- CEA Rated: 500W (1.0% THD+N) (2Ohm/1Ch) (100 Hz)

this means if i use 2 ohm i will only get up to 100 Hz of bass and if i use the 4 ohm i get up to 200 ?

so it would not be worth adding 200W extra and get -100 Hz less?
 

Nic92

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100+hz isn't really bass, more midbass than anything. that is just saying how much power that amp puts out at that frequency, Your sub wont see it because of box rise/voltage drop etc.
 

Tasmaniak

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100+hz isn't really bass, more midbass than anything. that is just saying how much power that amp puts out at that frequency, Your sub wont see it because of box rise/voltage drop etc.

seriously? 100hz is definetly bass infact it's a lot more common than you might think. Furthermore, just because an amps x-over is set to 80hz doesn't mean it's not playing 100hz+ it's just doing it at predetermined rate of decrease (often 12-18db/octave)

To the OP, what you are saying is sort of correct. It won't suddenly stop playing anything over 100hz. It will being to decrease the volume of anything over 100hz. But to be perfectly honest, I highly doubt you will notice.

Really curious as to what amp you found this on! As a typical rule of thumb (please forum stereo gods, I say rule of thumb not golden rule) an amplifiers quoted frequency response does not change based upon it's impedance load.
 

Fun_Bucket

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I'm with nic, <100hz non directional sub bass, anything above this is handled by mids. Depending on the quality and size of the mids, especially with a 3 way front, you would cross the mids even lower that way the sub bass blends better and there's no picking out the sub placement with your ears when its playing.

Amp specs there is just a stupid way of saying more power in a limited bandwidth.
 

MAG00

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I would have said that the frequency was there simply to specify what tone(s) were used to measure the output OR the frequencies where the THD is <= 1%. It's frequency RESPONSE would be an entirely different spec, which generally does not change with changing impedance loads.

OP, I don't think you really understand what frequency is. Frequency is not a power/similar rating, it is essentially a measure of the number of times the sound wave repeats in a second. A bass drum has a low frequency, a cymbal has a high frequency etc. Music is dynamic and therefore a musical signal contains a mixture of thousands of frequencies!
 
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David87965

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I would have said that the frequency was there simply to specify what tone(s) were used to measure the output OR the frequencies where the THD is <= 1%. It's frequency RESPONSE would be an entirely different spec, which generally does not change with changing impedance loads.

OP, I don't think you really understand what frequency is. Frequency is not a power/similar rating, it is essentially a measure of the number of times the sound wave repeats in a second. A bass drum has a low frequency, a cymbal has a high frequency etc. Music is dynamic and therefore a musical signal contains a mixture of thousands of frequencies!

i know its not power. watts is power. frequency is pitch....
 

Tasmaniak

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You know, I keep coming back to the same old thing with you guys... Nic and Fun Bucket, you both have the mindset of creating as much bass possible. Thats why nic has no boot space left just an ugly mess of a box that is capable of doing unmentionable things to the ladies! lol Nic, nice work on that also... Would love to know more about how you worked out the dimensions and tunings.

But back to the original topic... we are looking at a car that has 5 speakers. A pair of 6s up the front and a pair of 6s in the rear.... and a sub. Which is going to perform better at 100hz? The 6s or the amplified sub? Stop thinking about how much boot room you can take up and start thinking about what people like David are really wanting. Some people need to retain their boot... someone need to keep their pants clean... some people are married and are not concerned with ladies unmentionables. Start thinking realistically and not the ideal world.

I know the pair of you both know better than this.
 

Fun_Bucket

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errr what? i'm installing a pair of sealed xxls, and i have over 3/4 of my boot space still remaining, so clearly this has got nothing to do with creating me trying as much bass as possible ? I don't know of, nor have i ever set up anything where the sub is crossed over above 100hz, if your mids can't do 100hz cleanly then there's something wrong, my factory speakers will do it and they are junk....Nic on the other hand well he can't hear his speakers lol or himself think, but i admire the effort his gone to, yes even though his boot looks like a dogs breakfast.

Because you work in a car audio shop (presumaby?) therefore you think you know better than an enthusiast because you sell equipment.
 

Tasmaniak

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100hz is quite a common crossover point.

I don't think I know better than you because I work in the industry.... I know better then you because you came on this forum 4 years hardly knowing a thing asking for advice and you took it from me. At that point I'd already been in the industry a long time and unfortunately for me... will remain in the industry for a long time.

You know a lot now but like me... you don't know everything, but you refuse to listen to anyone who says differently. But not only do you refuse to listen, you decide to challenge everyone who does say differently. I learn all the time, and when some tells me something that I believe to wrong.... I go away and make sure that I'm right before I say anything.

-edit-... for the record, I don't "work" in a car audio shop.
 
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