[gperkins_1973]

What would you do between 4 18" IXLs or 2 FTW 21" drivers. Looking to go sealed from ported. Yes I know, I didn't think I would end up thinking about it. I am waiting for a price back from Mark at IST about shipping to the UK but it would be good to get some opinions. 4 IXL's would be cheaper and yes there's no replacement for displacement.

 

[chrapladm]

I would definitely go with four 18's. For me the options would be :
2 x 21
4 x 18IXL
4 x 18UXL
IXL's I thought liked bigger boxes but you dont have a problem with that. Are you going to use a clone amp?

I will be buying a pair of the UXL's probably around fall time to go in a pair of horned subs for my outdoor HT. I think Mark has some awesome products and will continue getting my subs from him.

 

[gperkins_1973]

Two 21's would need a 9 cu ft each sealed and 4 18's would only need 7 cu ft for each dual. I was originally looking at 8 JBL GTO-1514 15" drivers and I can get 8 off those for £600 delivered and would mach the spl off both the Mach audio's and would only require 2400 watts input power. They would however require a 15 cu ft for each dual. I am thinking off different options as I would like to go sealed but match the spl of my ported Q's.

I fancy a change but budget does come into play too.

Amp wise I would probably buy another EP4000 or an inuke 6000. The other thing I need to think about is the limit of power I can draw of my 240v circuit.

 

[chrapladm]

I am ........Kinda amazed you are upgrading again.lol

Not completely amazed but kind of.

 

[gperkins_1973]

The problem is running 2 ohm stereo. The ep4000 doesnt like low frequencies loud with the fan I have installed. I do miss playing my low hz stuff for a laugh knowing that 2 songs is the limit with that amp and fan befire it cuts out. I cant go back to the stock fan as the amp is 8 feeet in front of me. Dont get me wrong I love my subs but its like having a new car and ince yiu know where all the buttons are you want a new one. Lol.
I like overkill but just love the thought of looking at two 21" drivers with 34mm of excursion.

 

[chrapladm]

Sounds like a plan. I am getting the 21's because I just could not afford 8 of the 15's I wanted. lol

You could always buy another amp to hold you off. Then buy 21's for headphones.lol.

And please if you can make some videos. I know when I can I will be "continuing the trend."

 

[adio]

The problem is running 2 ohm stereo. The ep4000 doesnt like low frequencies loud with the fan I have installed. I do miss playing my low hz stuff for a laugh knowing that 2 songs is the limit with that amp and fan befire it cuts out. I cant go back to the stock fan as the amp is 8 feeet in front of me. Dont get me wrong I love my subs but its like having a new car and ince yiu know where all the buttons are you want a new one. Lol.
I like overkill but just love the thought of looking at two 21" drivers with 34mm of excursion.

did you model 2 21's vs 4 18's? if so, what does it look like?

 

[gperkins_1973]

Vitually the same in terms of spl. Smaller box for the 4 18 ixl's though 14 cu ft for the 18's and 18 cu ft for the 21's.

 

[chrapladm]

Those four IXL's seem to be the best bet for size and volume. Think it will come down to just preference.

 

[ISLAND1000]

The problem is running 2 ohm stereo. The ep4000 doesnt like low frequencies loud with the fan I have installed. I do miss playing my low hz stuff for a laugh knowing that 2 songs is the limit with that amp and fan befire it cuts out. I cant go back to the stock fan as the amp is 8 feeet in front of me. Dont get me wrong I love my subs but its like having a new car and ince yiu know where all the buttons are you want a new one. Lol.
I like overkill but just love the thought of looking at two 21" drivers with 34mm of excursion.

I like 2 21s looking at you too like in a 9^ft3 sealed box 24x48x18 made from (1) SHEET OF 3X4" PLY WITH BRACES AND MORE BRACES and the two 21s mounted one above the other vertically facing the listening area.

 

[TheGovernment]

You don't need 9 Cubic feet for the 21's, 5-7cf will work great and 9cf is not needed at all. The gain over 6 cf is not worth th extra size if you can eq.

If it was up to me since I have 4 ixls right now and will be the first to get the FTW's, I go with the 21's hands down.

 

[TheGovernment]

Here is 7 CF

http://i81.photobucket.com/albums/j207/tehbigshow/Mach5FTW-217cuft2kwFR.gif

http://i81.photobucket.com/albums/j207/tehbigshow/Mach5FTW-217cuft2kwXmax.gif

 

[ISLAND1000]

What are the dimensions of the 7CF box going to be and how do you fit (2) 21 inch diameter drivers in it?

 

[TheGovernment]

he never said he wanted them in 1 enclosure, in the thread he said 9 cf each. For a dual opposed I'd go 11cf but 9cf would work too with EQ

 

[gperkins_1973]

Remember I currently have two 15 cu ft boxes in my living room, so two 9 cu ft boxes would be a fair bit smaller.

 

[TheGovernment]

Ya but I'm sure you are going to EQ (I'm N8DOGG on avs) and the extra size doesn't gain you a whole lot. If you have no plans to eq then 9cf is good to go. I'm modeled every size from 5 to 10 and the sweet spot IMO is 7 but if you have the room and don't care, 9 would be fine. If you went with 6, you could eventually get 4 and stack them and the 2 subs wouldn't be much bigger that. What are you going to be running for amps?

 

[gperkins_1973]

I guess 7 cubes would be fine and the thought of doubling up the drivers. Now that would be fun for sure.

 

[ISLAND1000]

I'm suggesting you go to ( 4 ) 21s in ( 2 ) 9CF boxes!! Still smaller than what you have.
That way you won't have to upgrade for another . . . . say . . . . 2 years.

 

[gperkins_1973]

That way you won't have to upgrade for another . . . . say . . . . 2 years.

That would probably be about right. LOL.

 

[ISLAND1000]

Here is what I thought you were going to build.
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