Dual SVS SB-3000 or Dual PSA S1512 ?

[witwald]

https://www.bcspeakers.com/en/products/lf-driver/15-0/4/15ds115-4

This is the driver that goes into the S1512. It has 16mm of Xmax. Not bad, but significantly less than what you'd get with a regular subwoofer. More importantly, look at the specs and parameters of the driver. It has a 4.5" voice coil designed to take a ton of power, which can only be delivered to the driver without bottoming it out at higher frequencies. If you model it in a box, it rolls off very high. B&C even specs it as only going down to 35Hz.

The 15DS115 driver has a very low value of Qts = 0.18, and a quite high free air resonance frequency of Fs = 34 Hz. It's clearly been designed with high efficiency in mind, at the expense of low-frequency extension.

 

[Speeddeacon]

I've updated my spreadsheet, crossed out the questionable data (for PB-2000 Pro, SB-2000 Pro, and SB-3000), and made a note that the SVS subs will be re-retested.
Thanks for your efforts on this.

The SB3000 is a phenomenal performer and extreme value no doubt, but I'll be glad to see what the corrected measurements are. Hope to see them soon.

 

[kernelpanic]

Yea, I need to ask @sweetchaos to take my numbers out of his spreadsheet. Since I am doing a big round of subwoofer tests next month, I’ve revisited the SVS test and think I found the error but I can’t recalculate things to verify so I think it’s best to chalk that up as a loss on my end and re-test at a later date. I’ll have to remove them from my own spreadsheet as well.

@hardisj, Any idea when you're able to do the SVS sub re-tests?