Twin Towers BUILD LOG (1 Viewer)

[kryptonitewhite]

 

[kryptonitewhite]

OK, how about multiples?

 

[Adam Gregorich]

Easiest thing would be to just paste the link: http://i248.photobucket.com/albums/gg178/kryptonitewhite/CIMG2997.jpg into the insert image tool (icon on toolbar). There are two tabs. Select the one on the right that says image URL. Paste in the photo URL and hit OK. It will insert the photo. You can repeat this multiple times in a single post.

 

[kryptonitewhite]

5dB increments to see compression starting at -40dB ending at -10dB master volume. Yup, thats a 130dB peak Yup, thats solider than solid a 10Hz, yup, look at that 6Hz

15Hz on up

DC on up

 

[kryptonitewhite]

crossover 80hz vs 250hz

fun

10Hz -3.6dB FS
THD: 7.70% THD+N: 7.75%
2nd: 5.74% 3rd: 5.11%
4th: .339% 5th:.363
6th: .228 7th: .129
8th: .032 9th: .0258

124.4dB

 

[kryptonitewhite]

I have decided to take Thomas-W's advice and build a manifold on my door to house (4) Fi IB3 18's on the top and make 2 slot ports on the bottom out of the rectangles already there. The door is 1.25" thick, I will make a template/face of the entire door adding .75" to the thickness. I'll make a 25"x25" panel to plug the ports so I can run true IB as well. Here is a pic he suggested for me.

Go to Home Depot buy a cheap solid core door, do something like this .......

I will begin tearing the Twin Towers down tomorrow and use the wood to build the manifolds and ports. It will be nice to get the EP4000s out of the HT room cuz I haven't done the fan mods.

The IB3s are custom dual 4 ohm, 4 layer IIRC, series/parallel 4 ohm bridged per EP4000 (2 EP4000s, 2 subs per amp bridged).

I am wasting and tearing apart a very wonderful performing pair of enclosures. Under 10% THD these things hit 124dB @ 10Hz and 130dB @ 23Hz. If I would have braced them better that 25Hz-40Hz would have been fixed. They were 125 cubic feet each with a 12" port 12" long for a 13.4Hz tuning, 2 IB3s per tower.

Here is the Twin Towers build log:

http://www.avsforum.com/avs-vb/showthread.php?t=1231247


Here's the new build:


http://www.hometheaterforum.com/forum/thread/311078/build-log-990-cubic-feet-2-18-25-x8-25-x2-ports-9hz-tune-twin-towers-come-down#post_3806818