e8 v3 d2 sealed?

[ncochran]

I noticed on the sundown site that there is no recommended sealed box for these? Would it not sound good? Also I noticed that the FS is in the 50s, why is that, when all of their other subs are so much lower.

Also I noticed that the recommended tuning is at 35hz even though the FS is way higher.

Not bashing anything, just asking questions. I have 3 of them tuned to 33hz in a box that is 2.2 cubes (net) running off a hifonics brz2100 and I am just not quite getting the sound I am looking for. 13in per foot of port area and I just don't feel like I am moving any air at all and the bass just isn't hitting that hard. Box seems a little peaky and not at all smooth. If my box is too small or would benefit from polyfill, I can rebuild or fix.

But anyway, the real questions here are:

Is there no sealed config that would work for these subs?

Why is the FS so high and how does that affect things?

The rest is just me thinking out loud and looking to see if anyone has any advice. I am thrilled with Sundown overall though, I just haven't found the setup that suits me quite yet I guess.

[Chris Hammer]

Box I just built for sa8's was about a 1ft cubed a piece...maybe your box is on the small side?

Do you have pics?

[ncochran]

The second picture shows the subs just sitting in there without being screwed down. But you can get an idea about the box. It is 35Wx17Hx11D. The prted recommendation is .5-.75 cubes each and I am right about 2.2 net (factoring port/sub displacement, there is no bracing atm). I resined the inside but had a small leak on my top baffle but was able to seal it with gorilla tape. Rest of box seems to not leak. The top picture shows the box in actual state with both baffles. The bottom pic was just fitment testing mostly.

Edited March 26, 2013 by ncochran

[sundownz]

I noticed on the sundown site that there is no recommended sealed box for these? Would it not sound good? Also I noticed that the FS is in the 50s, why is that, when all of their other subs are so much lower.

Also I noticed that the recommended tuning is at 35hz even though the FS is way higher.

Not bashing anything, just asking questions. I have 3 of them tuned to 33hz in a box that is 2.2 cubes (net) running off a hifonics brz2100 and I am just not quite getting the sound I am looking for. 13in per foot of port area and I just don't feel like I am moving any air at all and the bass just isn't hitting that hard. Box seems a little peaky and not at all smooth. If my box is too small or would benefit from polyfill, I can rebuild or fix.

But anyway, the real questions here are:

Is there no sealed config that would work for these subs?

Why is the FS so high and how does that affect things?

The rest is just me thinking out loud and looking to see if anyone has any advice. I am thrilled with Sundown overall though, I just haven't found the setup that suits me quite yet I guess.

They will NOT do well sealed.

You will need a good bit of break-in time on them; the Fs will drop over time. They use the same spider, cone, and surround as the SA-8 v1.5 but with a coil that is lighter; this results in a higher Fs.

We used a single 6" aero out the side of the box for 3x SA-8 v.2 tuned to 30 Hz and it got pretty nasty ; we also tried E8 v.3 in the box and they worked well too -- obviously the SA-8 v.2 has more bottom-end but the sound from the E8s was good.

If you do want a sealed box the SD-2 8" is your best bet from our line.

Edited March 27, 2013 by sundownz

[ncochran]

Awesome!! Thank you Jacob. That is exactly the kind of info I was looking for. Would it be possible for you to pm me the box volume and port length that you guys used? Aero ports screw me up when it comes to figuring tuning. Thanks again for the info on the subs!

[sundownz]

My PMs are all disabled on here; but our box looked almost identical to yours but with a side firing 6" aero-port. About the same volume as well.

http://www.stevemeadedesigns.com/board/topic/140161-3x-sa-8-v2-in-jakes-vw-golf/

At a later date we put a 3500D v.2 on them ; then also tried E8 v.3 in there.

[ncochran]

Thanks!

[ncochran]

I added polyfill to the box last night, and carpeted it. It sounds great when playing rap/dubstep or anything else with tons of low sustained bass. It sounds terrible when playing rock and most country. I don't know a whole lot about it, but maybe that is something to do with the high FS and low tuning? If so I am guessing it will smooth out over time since the FS will drop over time.

If not, I am not that concerned. I got back into this as much for the intellectual challenge, as the actual sound itself. I thought I knew a lot when I was 16 hehe, more powa = more boom right?? Now at 36 I am learning that there is actual math/science involved in this and I am loving that side of it hehe. Thanks for all the info and any tips!