Rise of the Eighteens - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 137 Old 01-25-09, 11:28 PM Thread Starter
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Rise of the Eighteens

Here's the scenario...

Dual 18's using an LLT design in a home theater (dedicated room) of approximately 3500 cubic feet.

Approximately 120ft^3 (3400 liters) to work with for an enclosure... maximum port diameter is 8"... no length restrictions.

I want to use two 18's. They can either be combined in one enclosure or two individual enclosures.

Power will be one Behringer EP2500 bridged 4 ohm, so drivers need to be setup for a 4 ohm load.

Figure using about 1800-1900 watts max (EP2500 tested at about 1950 watts).

What 18's would you use... what size enclosure or enclosures... what tune, etc... ???

I will only consider using drivers from one of our sponsors.
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post #2 of 137 Old 01-25-09, 11:36 PM
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Re: Rise of the Eighteens

And you're at it again!

Told you a single 15 was too small for you!


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post #3 of 137 Old 01-25-09, 11:54 PM Thread Starter
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Re: Rise of the Eighteens

Well... ... this is for my new HT room. No way I can have just one sub in there... you know that.

I am going to open this up to sealed recommendations as well. With 120ft^3, I could do a sealed that would almost be an IB.
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post #4 of 137 Old 01-26-09, 12:48 AM
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Re: Rise of the Eighteens

Why sacrifice the headroom and extension when you can slap a pipe in the box and have ultimate bliss?


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post #5 of 137 Old 01-26-09, 12:57 AM Thread Starter
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Re: Rise of the Eighteens

Just a thought... for those that might come up with a good reason to go sealed.
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post #6 of 137 Old 01-26-09, 02:12 AM
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Re: Rise of the Eighteens

Good luck with that..


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post #7 of 137 Old 01-26-09, 07:15 AM
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Re: Rise of the Eighteens

Quote:
Power will be one Behringer EP2500 bridged 4 ohm, so drivers need to be setup for a 4 ohm load.
Then you only have 2 choices. Fi Q18-D1 or SoundSplinter RL-p18-D4. Here is A SPL model of one of each. Input power is 900 watts for both. Porting needs to be 10 inch diameter to keep the air speed acceptable.

Rise of the Eighteens-sonnie1.jpg




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post #8 of 137 Old 01-26-09, 08:04 AM
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Re: Rise of the Eighteens

With that huge amount of space available, I vote for the Q18's
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post #9 of 137 Old 01-26-09, 08:19 AM
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Re: Rise of the Eighteens

I do too. In a LLT application the Fi Q18 is the closest match to a Maelstrom-X.




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post #10 of 137 Old 01-26-09, 09:44 AM Thread Starter
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Re: Rise of the Eighteens

I wish Kevin had those Maelstrom-X drivers in a single 2 ohm or dual 4. It looks like they are dual 6 ohm.

I can actually open up this area that I have available to gain another 3-400ft^3 for a total of about 500-600 cubic feet. The opening into that other space would only be about 10" x 24". Not sure if that would restrict it too much or not, but that would give me the possibility of an IB system, would it not? Of course I might want to consider 4 drivers instead of 2.
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