How does this look for 4 18's?

[TnT_Sounds 10+ year member]

Fallen from RCB is in the works of designing me a box for 4 AQ HDC3 18's for my blow-through. This box I believe is a 6th order series tuned bandpass. I like it and it should work very well, Im just wanting everyones input on it

The top chamber is 9.5 cuft tuned to 64Hz and the bottom chamber is 13 cuft tuned to 30Hz.. Also keep in mind this is a rough sketch and there will be bracing and 45's throughout

Enjoy

Click to read more...

 

[mcsoul 10+ year member]

What are you low-passing your crossover at?

8 at 60hz looks a little flatter.

 

[DUMPED 10+ year member]

very nice..

what are you planning on running power/amp wise?

 

[TnT_Sounds 10+ year member]

What are you low-passing your crossover at?8 at 60hz looks a little flatter.

Probably at 50hz

 

[TnT_Sounds 10+ year member]

very nice..what are you planning on running power/amp wise?

Well I was debating on using my ATomic 7k's but Im going to use 2 Atomic 5000.1 at 17v

 

[TnT_Sounds 10+ year member]

Also does the cubic feet look good enough for 4 18's? Im kinda worried that its not enough

 

[mcsoul 10+ year member]

I'm going to have to defer to an expert. I think 6th order can handle

having the rear box somewhat smaller than one would think. I think

your tuning is very close to optimal for SPL, though a little narrow response

wise.

 

[TnT_Sounds 10+ year member]

This is the graph for 4 18's that Fallen emailed me. Also this is NOT SPL oreiented setup.. Strictly a low end daily pounding wind machine. The blue line is the 18's, the orange is for AQ 15'sand the pink colored is AA Havoc 12's

 

[Rashaddd 5,000+ posts]

Isn't that parallel tuned //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[TnT_Sounds 10+ year member]

Isn't that parallel tuned //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

I have no clue man.//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

 

[mcsoul 10+ year member]

That blue line does not plot that way on my winISD.

I get something that looks more like the pink one with

a cliff at 40hz.

 

[TnT_Sounds 10+ year member]

Hmm weird... Guess I'll need to find out what program Fallen uses.. I myself though have found flaws in the WiniSD program. I think Fallen uses SoundEasy v.15

 

[mcsoul 10+ year member]

Hmm weird... Guess I'll need to find out what program Fallen uses.. I myself though have found flaws in the WiniSD program. I think Fallen uses SoundEasy v.15

I'm no expert, his plots may be perfect.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[schrummy 10+ year member]

looks good to me. the only question i have is how are you going to put the subs in.

put them in then put the top on or ??????

 

[TnT_Sounds 10+ year member]

Yes sir! I gotta mount them suckers before puttin the lid on then glass the whole outside and use a forklift to put it in the truck