SD + XMAX = SPL ...correct?
03-22-2007, 11:44 AM
#51
Originally Posted by Ligeia
Nope, I think there is still a communication issue here. I was merely paying homage to DD as they have done great work with thermal power handling (if only they would disclose more info about those glues 
).
I am not talking about one specific situation. If you agree that SPL is very install dependent, I don't see why the same leap cannot be made with the design of a speaker. a 4" diameter voice coil that is 1mm tall would not be able to handle as much power as a 2.5" diameter voice coil that is 100mm tall. Never have I argued anything other than that a 4" diameter voice coil tells you nothing of it's power handling capabilities. There are a lot of variables in speaker design, and my only concern has been that looking at only one variable (the diameter of the voice coil) does not tell you very much about the end result.
Yeesh guys, don't over complicate things and maybe relax a little bit?
).I am not talking about one specific situation. If you agree that SPL is very install dependent, I don't see why the same leap cannot be made with the design of a speaker. a 4" diameter voice coil that is 1mm tall would not be able to handle as much power as a 2.5" diameter voice coil that is 100mm tall. Never have I argued anything other than that a 4" diameter voice coil tells you nothing of it's power handling capabilities. There are a lot of variables in speaker design, and my only concern has been that looking at only one variable (the diameter of the voice coil) does not tell you very much about the end result.
Yeesh guys, don't over complicate things and maybe relax a little bit?
But there would never be a 4" coil as pitiful as you have described. The fact is the bigger the voice coil the better they are usually built so time and time again the larger coil is going to be able to handle more power hands down. Also 4" coils are put into motor structures that are way more suited for handling big power, we are talking 40k per driver here, not 2k or even 5k.
What it looks like you are saying is 4 hp lawn mower motor will beat a 454 that has 1 hp in a dragrace. Ya no it will it is 4x as powerfull, but the fact is there has never been a 454 that only made 1 hp (same with a 4" coil that is 1mm tall) so the statement is pointless. This is exactally the same as what you said about the coils.
03-22-2007, 11:54 AM
#52
Originally Posted by The A Team
But there would never be a 4" coil as pitiful as you have described. The fact is the bigger the voice coil the better they are usually built so time and time again the larger coil is going to be able to handle more power hands down. Also 4" coils are put into motor structures that are way more suited for handling big power, we are talking 40k per driver here, not 2k or even 5k.
What it looks like you are saying is 4 hp lawn mower motor will beat a 454 that has 1 hp in a dragrace. Ya no it will it is 4x as powerfull, but the fact is there has never been a 454 that only made 1 hp (same with a 4" coil that is 1mm tall) so the statement is pointless. This is exactally the same as what you said about the coils.
What it looks like you are saying is 4 hp lawn mower motor will beat a 454 that has 1 hp in a dragrace. Ya no it will it is 4x as powerfull, but the fact is there has never been a 454 that only made 1 hp (same with a 4" coil that is 1mm tall) so the statement is pointless. This is exactally the same as what you said about the coils.
It's obvious that my point is not getting across, so let's agree to disagree and you can continue to assume that a 4" diameter voice coil guarantees high power handling without knowing any other information about the voice coil.
I'm not re-visiting this topic because it's like banging my head against a wall.
Last edited by Ligeia; 03-22-2007 at 11:57 AM.
03-22-2007, 12:01 PM
#53
Originally Posted by Ligeia
It's obvious that my point is not getting across, so let's agree to disagree and you can continue to assume that a 4" diameter voice coil guarantees high power handling without knowing any other information about the voice coil.
I'm not re-visiting this topic because it's like banging my head against a wall.
Cheers,
--
Terry McG
03-22-2007, 12:14 PM
#54
The point is that there is NOT a 2.5" coil on the market that will outperform a 4" coil. I will put the 4" coil used in the Cactus Sounds sub up against any 2.5" or even 3" coil on the market. I guess experience means nothing now a days. This just proves to everyone that SPL is purelly a mathamatical equation, just enter the #s into a formula and it = LOUD.
ps. You will be back....hahaha
ps. You will be back....hahaha
03-22-2007, 02:25 PM
#57
50 Watt CAFz'r
Join Date: Nov 2001
Posts: 306
It's all about the science.
Science IS SPLZ!
That arguement really got to a moot point. The scenarios were silly and unrealistic. Now were we using any given coil available on the market, a 4" will handle more power than a 2.5". I am not aware of any 2.5" coil that will handle more.
Not only that, but a 4" coil will be louder than a 2.5" coil. Given an equal overall size coil, same length of windings and all, the 4" will absolutely dominate the 2.5". Let's say we have a 4" coil with a 1" length, an equivalent 2.5" coil will have a 1.6" length. The 60% increase in length will in no way come near the benefits the 4" coil has over it in diameter, not to mention the over 250% increase in coil area. The 4" coil will have a much greater force applied to it given equivalent motor and will cool better on burps. The 2.5" coil will go thermal long before the 4" coil will.
Science IS SPLZ!
That arguement really got to a moot point. The scenarios were silly and unrealistic. Now were we using any given coil available on the market, a 4" will handle more power than a 2.5". I am not aware of any 2.5" coil that will handle more.
Not only that, but a 4" coil will be louder than a 2.5" coil. Given an equal overall size coil, same length of windings and all, the 4" will absolutely dominate the 2.5". Let's say we have a 4" coil with a 1" length, an equivalent 2.5" coil will have a 1.6" length. The 60% increase in length will in no way come near the benefits the 4" coil has over it in diameter, not to mention the over 250% increase in coil area. The 4" coil will have a much greater force applied to it given equivalent motor and will cool better on burps. The 2.5" coil will go thermal long before the 4" coil will.
03-22-2007, 06:25 PM
#59
500 Watt CAFz'r
Join Date: Apr 2000
Posts: 890
Originally Posted by The A Team
Here is a some advise for anyone who has read this thread: When RipRock makes a post on this forum i suggest you read it and make notes, instead of arguing with them.
Ligeia, i get what your saying but it`s like what A-team and A-roc described, who puts a 1mm coil in there driver?!?! LOL If your looking for a driver made with a 4" coil there is only a select few companys who make them, I can think of four companys right now who do. If you do some research they are all good stuff. On paper and in a vechicle are 2 different things. Paper will get you to a certian point, but a meter will get you more. We think, breath, sleep, spl.
