Winisd driver error for stereo integrity sql 15

[Ssmokeyy]

So I'm changing my room and need to replace my psa double 15 i have in the middle front. I'm going to build two boxes for 15's and want to see the models of what boxes would do what. But every time i try to fix the driver data error it still says the same thing. So i load up winisd with the sub anyways and i like what see from a ported box at 5.5 cubic box tuned to 20 hz. than i look at the con excursion and its crazy off the charts. I have a av20 Marantz so I have 4 sub outs. Room size is 13 x15 x 7 foot I have 2 si sql 15's in the back left sealed box on a 2800 rms amp. I have 1 15 on the right middle 15 si sql on 1200 rms sealed. I think for now I'm going to move the right side one into a bigger sealed or ported up front right corner and move the psa sub to the back right. and add another 15 to the front left. My main listening spot has a bad null anything under 60hz is a huge drop off in my spot. My goal is to have good sub 20 hz bass anything over 115db would be great by me. I have the power and will add another amp for the new sub.

 

[DVDdoug]

I don't know what causes "data errors" but I assume it's a combination of parameters that can't exist together.

than i look at the con excursion and its crazy off the charts.

I also assume there is a "simple" formula relating excursion to SPL in a sealed speaker so I asked my favorite search engine "How much excursion is required to get 115dB at 20Hz from a 15-inch sealed woofer?"

Apologies for using AI... I never fully trust but the AI answer says:

To achieve 115 dB at 20 Hz from a 15-inch sealed woofer, the required one-way cone excursion is approximately 15 mm under typical conditions.
This estimate is based on the relationship between cone area, air displacement, and SPL. For a 15-inch driver (approximately 176.7 square inches of cone area), producing 115 dB
at 20 Hz requires moving a significant volume of air—around 32 cubic inches—to genaerate a 20 Hz sine wave at that SPL level. Using the formula:

Excursion (in inches) = Air Volume / Cone Area

The calculation yields about 0.57 inches (14.5 mm) of one-way excursion, which aligns with real-world modeling and design practices. However, this assumes ideal conditions

The excursion in a ported box could be higher or lower depending on the tuning. Below the tuning frequency it can get "crazy". And either way, I'm not surprised that you would get crazy excursion with 1000W or more. But I haven't done that much modeling so that's just my intuition...

 

[Ssmokeyy]

I was at 60mm plus on winisd with 1000 rms. It wasn't until 300 rms that it was at 28mm. Some spec has to be wrong. Not sure witch one.