[GSteg]

Originally Posted by CBFryman

9500's where built for sound reproduction...what are you talking about? my god.

until i see a dd9500 score high points in the SQ portion of an IASCA comp, i will not see it as a pure sound quality sub. With such a high motor force, i don't see the objective of the engineers was for sound quality. Anyone knows that if SQ was the goal, too much BL is not good. You lose low-end performance.

To my knowledge Adire has charts on all of hteir woofers to what sized sealed enclsoure will allow for maximum excursion... neitehr RE nor DD do this.

yes, thats why i said no company does that unless they show a chart of it.

3.5cubes on a singular 15 displacing htat much air? and you are talking to me about SQ? i geuss so if you like the sound of a very windy port.

I know you know better than that to make such comments. the box size has almost nothing to do with port velocity. The port itself determines the velocity.

a ported box only peaks at around the tuneing frequincy, this peak can be easily off set for SQ by low tuning and proper port size for proper port velocity. along time ago Halibane showed me what playing around in WinISD will do for you...maybe you should do the same.

sure you can tune the port lower. you smoothen out the response down low, but guess what, you'll also lose top-end. Your rolloff will be at a lower freq. than if you were to tune it at a higher freq.



[quote]
75mm is what it takes to bottom out the suspension. which can be done with out, as sr20 stated, thermaling the coils. [quote] if 75mm is the suspension, then why imply it was peak to peak xmax when comparing with the XXX? Also, the limits on the suspension does not relate to the thermal power of the coil. My idmax in an infinite baffle will reach full excursion with only 300w, but the coil will take up to 1kw daily.

DD also markets agianst Xmax since, as is true, xmax doesnt state how well a motor can stop a coil and then turn it a round in the other direction. if 10mm out of your excursion is the morot trying to slow and pull the cone in the other dirtection bass gets slopy and isnt as loud.

xmax doesn't tell you how well it can stop a cone, but it can tell you that at xmax, you are at 70% of the total BL from the rest position. Lose more BL and you're shooting up the THD. What does tell you how well the motor can accelerate the cone is inductance.

9500 uses a standard coil...however the magnet set up uses extra long magentic feilds. though it isnt as good as XBL it is still the highest of highs. im not and never did bash the XXX nor the Brahma. im jsut tired of everyone saying "oh yes they have XBL^2, they are the greatest in the world for SQ and SQL."

Almost all coils looks the same to me. The same ol' cylinder coil. Still highest of the high? i'm not sure what you mean, since that topology is used in almost every sub out there. And i agree, the brahma and xxx are not the end of all sub because there is no such thing.

the XXX wasnt made to shoot out SQ either. because if they did they wouldnt be paying adire for XBL^2. they would most likely be paying JL for DMA technoligy since, after all, when looking for SQ XBL delivers almsot no THD but DMA does also. the XXX is a widely used SPL woofer and so is the Brahma and so is the 9100, 9500, and 9900 (which are so expensive because DD only makes a limited ammount).

The XXX wasn't made to shoot out SQ? i beg to differ. Please talk to my friend David over at RE. The design itself has SQ written all over it. I'm not sure why RE would ask JL for the technology. Adire audio are built by Destijl. RE happens to be Destijl and they share some of the same stuff. Wouldn't be logical to go to another company. Again, I don't think you know exactly why RE uses the XBL^2.

The design of the XBL^2 is cheaper than the DMA of JL. They have the SAME goals, but different approach to it. The XBL^2 has the top plate designed to channel flux, so you don't lose as much BL when your cone moves. In the JL audio, the vented pole piece is crossed-drilled to channel the flux. With JL's method, you would need to have a longer coil, and that increases the inductance. JL's method is more expensive than Adire's method.

3500's are good for daily drivers, if you where looking for SQ i would have reccomended the 9100 or 2500. but w/e.

I did not see a 9100 back then to buy it. All i saw was a 3500 so i went with what was there.

As yourself this, are you really going to buy a sub at MSRP?
You can get a 13w7 with warranty if you know where to look. that "only" 300 more is now "only" 700 more. I'll take (2) 13w7 over a 9917.