Sx18

[wErd 5,000+ posts]

now that the group buy is up i have decided on a new setup. i want an 18" SX, problem is...i dont know jack about this speaker. would 1500watts power it sufficiently, what is the recommended size for a ported box for one of these? and hows the SQ vs SPL?

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[wErd 5,000+ posts]

You want a RE SX 18" sub but don't know anything about it??? http://www.reaudio.com

thanks for the, oh so informative post....now stay out

 

[skmfkr 5,000+ posts]

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[JeffyZ33 10+ year member]

I'm interested in one as well off of the same power.

I do know though, that the reccomended enclosure is 6.5 cubes @32hz. That's a pretty big box, lots of bracing required. I'm wondering what the general consensus is about them. I love the idea of a single sub setup, a MASSIVE single sub //content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

 

[wErd 5,000+ posts]

i guess ill just buy one and run it free air, powered off of my headunit...sound good?

 

[JimJ 5,000+ posts]

Wonderful.

 

[Flipx99 5,000+ posts]

i guess ill just buy one and run it free air, powered off of my headunit...sound good?

depends on how you wire it..

j/k

 

[negativezeroz 5,000+ posts]

6.5ft^3 tuned to 32Hz (reccommended by RE) Id do in that area but tuned to lik 29Hz or 30. Just me tho.

1200W should be good.

Never used RE subs so I dont know. //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[swimfreak26 10+ year member]

Been screwing around with my brother's 15 for a while now...fairly efficient driver.

The amp used has been a directed 1100d, and we've messed around with a few different boxes, and different wiring configurations (ie different amounts of power to it). Here's what I found - in a 94 nissan sentra (small car).

With ~400 watts, 2.2 cubes @32Hz: Sub was starved for space, low end lacked, but it was a spare box laying around and not meant for the driver. Still pretty loud.

~400 watts, 3.2 cubes @34ish Hz: Sub really shines. This box is about the right volume IMHO, could have a little better low end response, but LOUD, very loud. To my tastes, this was too loud to listen to on a daily basis.

~1100 watts, 2.2 cubes @ 32Hz: Still starved, not a lot of difference.

~1100 watts, 3.2 cubes @ 34ish Hz: LOUD, very very loud. The low end starts to pick up here with the added power. I would never feed the sub more than this much, it just doesn't need it if you're using it for daily use. Driver moves a lot, even in a ported enclosure.

Now, beyond being loud, it is not the most musical sub I've heard. My A series (eD) and my avalanche put it to shame, but for a street beater that I would be OK abusing, it is a great driver.

So, in response to your question, I would assume 1200 would be plenty for an 18. A little more moving mass, but the same motor so I wouldn't think you'd need much more power than the 15 to really get it humming.