Help with WinISD please

[Salami 10+ year member]

Curently have a Solobaric s8a. Looking for SQ above all else in a limited space.

Narrrowed it down to these choices. I all ready own the Solobaric s12d. Leaning towards getting a single 10 to replace it. Can someone tell me how to decipher which one may give be the best SQ out of these options? Would like to try out the Eclipse SW8000 but it seems from research these things beg for lots of airspace I don't have. These charts seem to indicate it may be the best option for me. Max available net Vb is 0.85 cf.

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[BuckyBoy 10+ year member]

i like the white line.

i agree

 

[terra 5,000+ posts]

i like the white line.

x2

 

[Salami 10+ year member]

What are the reasons for liking a particular speaker?

Besides making a decision I am trying to learn about the program.

 

[Salami 10+ year member]

Can someone tell me how to decipher which one may give be the best SQ out of these options?

Nobody here knows about this program? //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[tcguy85 10+ year member]

i used it when i designed my box for my Dayton H.O. 10.

 

[mrogowski 5,000+ posts]

WinISD (or any program for that matter) will not be able to tell you the sonic signatures of any driver. What it does show you is how the driver will act, or react, when placed in a certain enclosure.

Some things to look for when using WinISD on a driver would be excursion, impedance and vent velocity (if you were doing a BR enclosure). SPL output is hearsay since the environment will play a big factor in total SPL output.

Many folks here will tell you that using WinISD is wasteful when trying to determine designs for vehicles. While much of that is true, WinISD will provide you at least some basics or guidelines towards building a box that better matches the driver.

On a personal note, I would lean towards the purple line myself. At least in that box size I'm fairly certain I would get the lowest bass output from the bunch.

 

[Salami 10+ year member]

WinISD (or any program for that matter) will not be able to tell you the sonic signatures of any driver. What it does show you is how the driver will act, or react, when placed in a certain enclosure.
Some things to look for when using WinISD on a driver would be excursion, impedance and vent velocity (if you were doing a BR enclosure). SPL output is hearsay since the environment will play a big factor in total SPL output.

Many folks here will tell you that using WinISD is wasteful when trying to determine designs for vehicles. While much of that is true, WinISD will provide you at least some basics or guidelines towards building a box that better matches the driver.

On a personal note, I would lean towards the purple line myself. At least in that box size I'm fairly certain I would get the lowest bass output from the bunch.

All valid points. I realise I won't be able all the answers to the questions I have with this program. I am trying to make the best decision with the limited information I can get. Wish I had access to better software, more time and money to try what would work best. //content.invisioncic.com/y282845/emoticons/greedy.gif.5a53e6246569d7ab79867170f3b06629.gif

Pertaining to the purple line (SW8000), should I be concerned about the box Qtc? I figured since I am looking for sound quality I should be shooting for a Qtc of0.707. The SW8000 needs about 1.6 cf to get that (way more space than I have or am willing to give up. I have been leaning towards the Infinity if I base my descision mostly on Qtc. The SW8000 has got me thinking the output is going to be better even with the less than ideal Qtc.

Am I assuming this correctly?

 

[mrogowski 5,000+ posts]

Yeah, it is tough, especially when you don't have the ability to listen to the product you are looking at. All you can do is go on what others say about it.

Qtc of 0.7 represents a flat response. The reason I mentioned the purple one is because it is easier to tune the bass down electronically than it is to add it. Pretty well all decks nowadays come with some sort of equalization. Chances are, you will be using an electronic crossover for the sub anyway which makes fine tuning even more simple.

If you want absolute bass "quality", aim for a Qtc of ~0.5. You will however, find that too lean for your tastes and end up boosting your EQ, so why bother?

 

[Salami 10+ year member]

Qtc of 0.7 represents a flat response. The reason I mentioned the purple one is because it is easier to tune the bass down electronically than it is to add it. Pretty well all decks nowadays come with some sort of equalization. Chances are, you will be using an electronic crossover for the sub anyway which makes fine tuning even more simple.
If you want absolute bass "quality", aim for a Qtc of ~0.5. You will however, find that too lean for your tastes and end up boosting your EQ, so why bother?

Definitely using an electronic crossover. Currently using a ten-year old Alpine 7844 but will be upgrading to an Alpine CDA-9887 or Pioneer PRS-880 soon.

With the SW8000 and a Qtc of 0.909 would I be able to tune to my liking with the above equipment to get a good response? I want to make sure the sub has decent extension to about 20-25 hz. The sub is going to be in an 96 Civic hatchback (small volume cabin); will the small cabin work well with the 0.909 Qtc to give me good extension?

I am pretty sure going under a 0.707 won't make me happy. I don't have to even get to the 0.707 if not needed to get the SQ I am looking for. Just need decent extension and quality to blend nice with a set of A/D/S 336is components I have. The old 8" Solobaric I have is not cutting it with the road noise from the car (next project: lots of sound damping!).

 

[Salami 10+ year member]

Anyone have insight on my previous post (#11)?

 

[skateboardkid 10+ year member]

If a solobaric 8"is not enough output you might have to move up to a 10" subwoofer to get the desired output.

Also to look at are IDQ 10" it performs well in .65 and the sub takes .05 displacement. Does not need a ton of power and is Sq based. Model it up in the .85 you have to work with and it shoudl have decent extension.

All of the boston pro 10" are .5cF recomended sealed enclosure size check them out for sure.

if you can fit a 10" you are gonna have considerable more output then any 8" of comparable quality.

About the Qtc of .9 should not adversly affect performance. will have more of a peak and roll off faster though the transfer function of the car may smooth this out.

read about all the theil small parameters here

http://www.members.shaw.ca/LoudSpeakerBuilder.ca/thiele-small.html

they have a graph similar to your with same driver different size boxes and they show how the qtc affects the out put of said driver.