Can Someone Model Some Subs for Me?

[audiobaun 5,000+ posts]

If they do Lock up Throw throw the 8s back in.. LOL

 

[winkychevelle 10+ year member]

Box too small.

Response is gonna be peaky and you'll run into power compression before getting the result you want.

Personally would not put those subs in anything smaller than 1.25 each more likely 1.5 each

 

[Deiimos]

I’m not against whacking the numbers into WINISD and seeing what it spits out for box size, assuming I can get the specs into the program without it spitting out integrity check errors (tried to do this with some old Visonik V1065S4 subs and took a while to get WinISD happy with the TS parameters, and I recall having that happen a lot years ago. I have not built a box in 10 years. That said, I can try when I get a chance if I feel up to it, assuming I don’t run into issues, but I make no guarantees.

Here is a question though. Sundown has always been a solid company as far as I remember being on forums for 15 + years, so why not send them an email with your current box specs and your plan to run 4, and see what they say? Surely they would know what will work and what won’t, or if that size box will allow solid performance.

10 years ago you would have had 50 people model this for you within 10 minutes.

 

[Beatin' 10+ year member]

i put the parameters in winisd.

Actually, the box may be too big. 3.7cu/ft net with a 7x6.25 port dimension which equals 43.75in/sq. It is 22.25in long tuned to 33.95hz.

compared to 4 sa10's in a 3.7cu/ft sealed box, the ported box is VERY peaky. At around 35hz you have well over 30-40ms group delay. Within 5hz, from 35 to 40hz there's a 3db difference.

The box is so big for these subs, this is a rare case where I would attempt a 6th order build instead.

 

[Bobbytwonames 5,000+ posts]

Box too small.

Response is gonna be peaky and you'll run into power compression before getting the result you want.

Personally would not put those subs in anything smaller than 1.25 each more likely 1.5 each

Sundown recommends 1.0 cubes ported.

 

[spokey9 5,000+ posts]

A lot of companies recommend smaller then ideal specs for their subs

 

[Bobbytwonames 5,000+ posts]

i put the parameters in winisd.

Actually, the box may be too big. 3.7cu/ft net with a 7x6.25 port dimension which equals 43.75in/sq. It is 22.25in long tuned to 33.95hz.

compared to 4 sa10's in a 3.7cu/ft sealed box, the ported box is VERY peaky. At around 35hz you have well over 30-40ms group delay. Within 5hz, from 35 to 40hz there's a 3db difference.

The box is so big for these subs, this is a rare case where I would attempt a 6th order build instead.

Why did you bring up a sealed box? I'm going to run the SA 10's in a 3.69 cubes net ported box. Are you saying that my 3.69 cube ported box is too big for the 10's?

 

[Bobbytwonames 5,000+ posts]

A lot of companies recommend smaller then ideal specs for their subs

Worst case scenario I would just run three 10's in the same box. My box builder has been doing this for over 30 years and he thinks the 4 - 10's will be fine.

 

[Bobbytwonames 5,000+ posts]

i put the parameters in winisd.

Actually, the box may be too big. 3.7cu/ft net with a 7x6.25 port dimension which equals 43.75in/sq. It is 22.25in long tuned to 33.95hz.

compared to 4 sa10's in a 3.7cu/ft sealed box, the ported box is VERY peaky. At around 35hz you have well over 30-40ms group delay. Within 5hz, from 35 to 40hz there's a 3db difference.

The box is so big for these subs, this is a rare case where I would attempt a 6th order build instead.

How am I going to do a sixth order behind my seat?

 

[Beatin' 10+ year member]

Why did you bring up a sealed box? I'm going to run the SA 10's in a 3.69 cubes net ported box. Are you saying that my 3.69 cube ported box is too big for the 10's?

I used a sealed setup as a reference point. Compared to that, yes the ported box might be too big for 4 sa10's. However, I'm using a Ql factor of 1000, which means the box is completely lossless and doesnt leak air, which makes the predicted frequency response look very peaky.

How am I going to do a sixth order behind my seat?

Tough call, might not have the best dimensions available.

 

[Bobbytwonames 5,000+ posts]

I think you will be fine to be honest man. You will know when they bottom out and tune properly to keep them from locking up.

Why did you bring up bottoming out? I hear my 8's bottom out when I play 28 hz. or lower full tilt.

 

[Bobbytwonames 5,000+ posts]

I used a sealed setup as a reference point. Compared to that, yes the ported box might be too big for 4 sa10's. However, I'm using a Ql factor of 1000, which means the box is completely lossless and doesnt leak air, which makes the predicted frequency response look very peaky.



Tough call, might not have the best dimensions available.

How could my box be too big when Sundown recommends 1.0 - 1.25 cubes per sub for a ported enclosure and I will only be giving the subs .92 cubes per sub?

 

[Bobbytwonames 5,000+ posts]

I used a sealed setup as a reference point. Compared to that, yes the ported box might be too big for 4 sa10's. However, I'm using a Ql factor of 1000, which means the box is completely lossless and doesnt leak air, which makes the predicted frequency response look very peaky.



Tough call, might not have the best dimensions available.

A sixth order for four tens behind the seat of a standard cab? I think that is borderline impossible.

 

[deez283 10+ year member]

Does your box builder use any type of software to model subs?

 

[Bobbytwonames 5,000+ posts]

Does your box builder use any type of software to model subs?

I don't think so. He does everything on his phone. He knows his shitt. He has a shop where all he does is build subwoofer boxes. That's pretty impressive in itself. Most box builders do it in the garage at their house. Stereo shops in Vegas call him to build their customers boxes. He has been building subwoofer boxes since he was 13. He builds complicated boxes in hours not days. This is one box that he built. 32 -6½" subs.

 

[deez283 10+ year member]

Just roll with what your builder says and I'm sure you will be happy.

 

[Beatin' 10+ year member]

How could my box be too big when Sundown recommends 1.0 - 1.25 cubes per sub for a ported enclosure and I will only be giving the subs .92 cubes per sub?

I dont know. Ask Sundown why their sa10's model so peaky on winisd. Maybe they like it that way.

 

[winkychevelle 10+ year member]

Sundown recommends 1.0 cubes ported.

I came up with 4.6 as optimal. My sa10v2 we're in 1.5 each and they performed very well

 

[Bobbytwonames 5,000+ posts]

I came up with 4.6 as optimal. My sa10v2 we're in 1.5 each and they performed very well

Are those subs different than the classics? I'm going with the 750 rms classics.

 

[winkychevelle 10+ year member]

Are those subs different than the classics? I'm going with the 750 rms classics.

Yea I modeled up the classics. And came up with 4.6after displacements.

What you have will work it just won't be optimized