Can Someone Model Some Subs for Me?

[Bobbytwonames]

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]

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]

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]

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

 

[Bobbytwonames]

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]

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

 

[Beatin']

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]

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]

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]

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

 

[Bobbytwonames]

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

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

I have designed a new box that would be 4.4 cubes net after sub and port displacement. It would still be under the window line.

 

[Bobbytwonames]

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

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

What frequency range do they appear to have? My current box is tuned to 33 hz. or 34 hz. and it peaks @ 31 hz. in my truck.

 

[winkychevelle]

What frequency range do they appear to have? My current box is tuned to 33 hz. or 34 hz. and it peaks @ 31 hz. in my truck.

30-55 is the primary it's down 3db by 60hz and was down 3db at 28hz but if you were peaking 3db below 34 with cabin gain I'd say you should still touch 28hz quite strongly and I was using the 34hz tuning you started with. Cabin gain is gonna throw off most box building programs.

I like to run a frequency sweep in a sealed box and record the response and subtract the predicted response from the actual measurement. This gives me an idea on how the cabin affects things. But this requires some measurement equipment.

With enough power I think you could make 1cube per work but you suffer on the lower end at rated power.

Could you use aeroports to save space? 7in² per cube works ok 10in² per cube is were I like to be. I ran a single 4inch in 1.5 each without port noise but I wanted a touch larger port area.

 

[Bobbytwonames]

30-55 is the primary it's down 3db by 60hz and was down 3db at 28hz but if you were peaking 3db below 34 with cabin gain I'd say you should still touch 28hz quite strongly and I was using the 34hz tuning you started with. Cabin gain is gonna throw off most box building programs.

I like to run a frequency sweep in a sealed box and record the response and subtract the predicted response from the actual measurement. This gives me an idea on how the cabin affects things. But this requires some measurement equipment.

With enough power I think you could make 1cube per work but you suffer on the lower end at rated power.

Could you use aeroports to save space? 7in² per cube works ok 10in² per cube is were I like to be. I ran a single 4inch in 1.5 each without port noise but I wanted a touch larger port area.

My peak is 148.9 @ 31 hz. It does 143.3 @ 25 hz. It does 147.4 @ 28 hz. I hope that I can play 30 hz. - 40 hz. real good still.

 

[winkychevelle]

My peak is 148.9 @ 31 hz. It does 143.3 @ 25 hz. It does 147.4 @ 28 hz. I hope that I can play 30 hz. - 40 hz. real good still.

At 4.4ft³ at 34hz I don't think that will be a problem. I think you will still have good output at 28hz