Sub selection for infinite baffle - BMW 3-Series (E90 E92) Forum

thaar · 01-29-2013, 09:39 AM

I'm a complete newb when it comes to WinISD Pro, but I modeled the following woofers using a closed chamber at 11ft^3 since I have a spare tire in my trunk:

(Woofer - Qtc)
JBL W15GTi - .591
AE IB15AU - .634
AE SBP15 - .628
Fi IB315 - .829
SSA Icon 15 - .566
AA Havoc 15 - .544

I did not account for cabin gain (not sure how to do that just yet), but they all seem to model fairly close to each other except for the Fi. I'm not entirely sure what to be looking for in the graph, but it appears the AE IB15 would be the winner, particularly when you take into account its cost (again, without taking into account cabin gain). I was also surprised at how close the IB15 and SBP were overall. I'm leaning towards one of the AE's since they produce a Qtc closest to .707, and from what I understand, my Qtc will raise a bit since I carry my golf clubs with me most of the summer.

Is the SBP15 worth the extra $100 over the IB15??? The extra money doesn't bother me, but how close they model surprises me. I do like that the SBP series uses a larger motor structure and thicker top plate than the IB series does. They also state that it has lower distortion.

Thoughts?

kaigoss69 · 01-29-2013, 02:07 PM

The SBP is the better driver. However they model virtually on top of each other. You cannot get the IB an longer and the SBP is the replacement, so look no further. The QTc of around 0.6 is perfect IMO. I tried QTc of .7 and higher and I did not like it, too loose sounding.

thaar · 01-29-2013, 02:55 PM

Actually, you can still get the IB. I e-mailed John last week. I was leaning towards the SBP anyways.

01-29-2013, 09:39 AM	#1
thaar New Member Drives: 2009 335i x-drive Dinan Stage2 Join Date: Apr 2012 Location: Englewood, CO Posts: 29 iTrader: (0)	Sub selection for infinite baffle I'm a complete newb when it comes to WinISD Pro, but I modeled the following woofers using a closed chamber at 11ft^3 since I have a spare tire in my trunk: (Woofer - Qtc) JBL W15GTi - .591 AE IB15AU - .634 AE SBP15 - .628 Fi IB315 - .829 SSA Icon 15 - .566 AA Havoc 15 - .544 I did not account for cabin gain (not sure how to do that just yet), but they all seem to model fairly close to each other except for the Fi. I'm not entirely sure what to be looking for in the graph, but it appears the AE IB15 would be the winner, particularly when you take into account its cost (again, without taking into account cabin gain). I was also surprised at how close the IB15 and SBP were overall. I'm leaning towards one of the AE's since they produce a Qtc closest to .707, and from what I understand, my Qtc will raise a bit since I carry my golf clubs with me most of the summer. Is the SBP15 worth the extra $100 over the IB15??? The extra money doesn't bother me, but how close they model surprises me. I do like that the SBP series uses a larger motor structure and thicker top plate than the IB series does. They also state that it has lower distortion. Thoughts?
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01-29-2013, 02:07 PM	#2
kaigoss69 Colonel Drives: '08 335i Join Date: Jul 2008 Location: SC Posts: 2,270 iTrader: (5)	The SBP is the better driver. However they model virtually on top of each other. You cannot get the IB an longer and the SBP is the replacement, so look no further. The QTc of around 0.6 is perfect IMO. I tried QTc of .7 and higher and I did not like it, too loose sounding. __________________ Mobridge DA2 > JBL MS-8 > JL Audio HD600/4 > (3) Hybrid Audio L3SE & (2) Rainbow Cal25; JL Audio HD900/5 > (2) Morel HCW-10 & (1) AE SBP15

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01-29-2013, 02:55 PM	#3
thaar New Member Drives: 2009 335i x-drive Dinan Stage2 Join Date: Apr 2012 Location: Englewood, CO Posts: 29 iTrader: (0)	Actually, you can still get the IB. I e-mailed John last week. I was leaning towards the SBP anyways.