An LLT with two AE IB15s? - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 58 Old 04-09-07, 07:22 AM Thread Starter
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An LLT with two AE IB15s?

Steve et al

I need more bass down low and can't squeeze any more out of my 4 x 15" IB without playing it loud or boosting to silly levels at 20Hz with the BFD.

Bypassing the BFD gives me back my bass but it's humped high at 40Hz and I lose most of the bottom end.

My classical organ music is stretching my wife's tolerance levels. She hates it when I crank it just to get more bass.

When she wants to play her rock music she sneers at the IB as completely gutless compared with "her" 16-46PCI!

Would you like to run some numbers past me please?

No promises it will get built but there's a 9' feet long x 4' high triangular space under the sloping ceiling behind my TV and speakers.

This space is just used for bookshelves and boxed storage at the moment.

8' x 4' is a whole sheet of 3/4" plywood or MDF!

We might be looking at ~60 cu.ft or ~1700 liters!

It's probably much too small for 4 x 15" drivers but is it big enough for 2?

Thanks

Chrisbee
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post #2 of 58 Old 04-09-07, 07:59 AM
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Re: An LLT with two AE IB15s?

Hey Chrisbee!!! Welcome to the future



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post #3 of 58 Old 04-09-07, 08:08 AM Thread Starter
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Re: An LLT with two AE IB15s?

Rodny

A 10" PVC pipe is so NOT 21st century!

How many cu feet did you need in each of your dog kennels?
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post #4 of 58 Old 04-09-07, 08:19 AM
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Re: An LLT with two AE IB15s?

Each one is 35cft tune to 11Hz and the "21st century" 10"x 35" port!!


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post #5 of 58 Old 04-09-07, 08:45 AM Thread Starter
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Re: An LLT with two AE IB15s?

Rodny

I've just been re-reading your "makeover" thread.

But it was mostly about some supermodel guy posing in a kennel!

Steve wanted me to build a 150 cu.ft. box for my 4 x 15" drivers.

No way! It would become the tallest structure in Denmark!

I might just squeeze in two drivers in the space I have available.

I could have a hybrid of 2 x 15" IB and a 2 x 15" LLT in the same room.

That way I could still belong to The Cult and The Shack.
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post #6 of 58 Old 04-09-07, 09:19 AM
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Re: An LLT with two AE IB15s?

Something is definitely wrong with your IB. Mine will chase you out of the house playing Metallica, Judas Priest etc... I assume you must have a huge null. Are you sure she isn't just used to bloated bass? I'm ubmmed that you can't get the IB to behave to her liking.
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post #7 of 58 Old 04-09-07, 11:33 AM Thread Starter
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Re: An LLT with two AE IB15s?

Quote:
Darren wrote: View Post
Something is definitely wrong with your IB. Mine will chase you out of the house playing Metallica, Judas Priest etc... I assume you must have a huge null. Are you sure she isn't just used to bloated bass? I'm ubmmed that you can't get the IB to behave to her liking.
Hi Darren

When I put the 16-46 in the same place as the IB the bass was totally overkill with almost zero gain on the Bash. So I have always had the SVS about 7 or 8 feet from that corner. Where it is still very powerful (~108dB RS uncorrected) on the deep stuff and climbs naturally all the way to 15hz without any eq before falling away rapidly.

I can get loud bass from the IB without the BFD but when I add any boost @ 20 Hz to try and drag the sub 30Hz response up I lose lots of bass output on programme material. The bass detail is tremendous but I just can't shake the floor like the SVS does so easily on films.

The IB will go very loud indeed using REW with "frequency follows cursor" but not on films unless I turn the master volume well up. I can't run the IB hot because it is already at max on the EP2500 and +6dB on the CX2310.

I ought to do a sweep with the SVS right in front of the IB using the Galaxy SPL meter to check the response.

Then do a sweep of the IB with the BFD bypassed for comparison.
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post #8 of 58 Old 04-09-07, 07:12 PM
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Re: An LLT with two AE IB15s?

Quote:
Chrisbee wrote: View Post
Rodny

I've just been re-reading your "makeover" thread.

But it was mostly about some supermodel guy!


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post #9 of 58 Old 04-09-07, 11:17 PM
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Re: An LLT with two AE IB15s?

That just doesn't seem like it is working well Chris. My measly 2 15 inch drivers in the IB will shake the house so hard that I truly am afraid of structural damage.
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post #10 of 58 Old 04-10-07, 12:41 AM
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Re: An LLT with two AE IB15s?

If you want to go LLT and do it right, I'd sell those drivers and get a couple higher excursion ones better suited to the task at hand. I know TC Sounds ships to your neck of the woods - one or two TC 2000 15" SVCs in a LLT would probably be all you could handle.


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