Dayton RSS390HF-4 Suspension Sag

[its_bacon12]

Ok, I planned this out to get a pair of RSS390HF-4's and make some LLT sonotubes with them. Problem is I calculated a suspension sag of 5.47%

I doubt it'll be a problem since I'm not a perfectionist, more of a it's-close-enough-ist.

Wondering if anyone has had any experience with these drivers and suspension sag issues or if it's immaterial since I'll be driving with two, lessen the stress on them.

[ThomasW]

Having two doesn't lower the stress, since the primary issue is the long term effect of gravity, not how loud the driver/drivers are playing.

The RSS390's are very good drivers for certain applications, but their relatively short Xmax means they aren't the best candidates for the rigors of a low Fb EBS alignment.

Have you considered any other drivers?

[its_bacon12]

I have but these are the best value for me. I'm not out to spend $2k on subwoofers and I'd like to have some considerable output as well.

I know the long term effect is from gravity, not stress, but wouldn't that be beneficial running a pair so you don't run out of the 94.53% of xmax remaining as quickly.

Tell me if my logic is flawed.

[ThomasW]

No one I know spends $2K on sub drivers either.

Having a pair of drivers means you'll get between +3 dB to +6dB more output

A pair of RSS390's are $320+ shipping for the pair. They're not lightweight I know since I have 4 of them.....

A Exodus Audio Maelstrom-X is $395+ shipping.

In most instances shipping on a single Mal-X starts closing the gap of the total delivered cost of the options being discussed.

The Mal-X has considerably more swept volume than a pair of RSS390s,

Vd, I use Sd times Xmax doubled, means 7.8L for the Mal-X vs 4.6L for a pair of RSS390's

[its_bacon12]

Well, I can get free shipping on them. And I want to make a pair of sonotubes since it's easier for me to transport since I won't have a permanent address until I'm out of college. Tried a big MDF box for last year and it's the biggest PITA to move. And that was for a Shiva-X

[ThomasW]

Might see what a 300L Fb15Hz sim shows with say 230 watts of input power.

[its_bacon12]

I'm going to go a different route now. 2 seperate IXL 18.2.2 each in 417L to 14 hz.