[goonstopher]

Long story short (please don't ask for more right now - I am losing it after this) my dual ED 19ov.02 LLT sono build just wont work. I am not handy and made too many errors that added up and ruined the build.

I am trying to salvage it my making 2 smaller sealed sonos that I may co-locate to get more headroom or spread it they are strong enough.

I just need some numbers run to see if this is feasible and what the output would look like.

my tubes are about 24.2 internal diamater, ed's own a7s-400 is 4 cu feet and has 1300 watts. I would like to get it a bit lower into the high teens and theirs only goes to 22 pre-eq.

What do the output numbers look like for this woofer in 4'cu with 1300w?

Can a bigger enclosure let it go a bit lower or just EQ?

Is there anyway to get it to the high teens? eq2? Can an EQ2 and a reckhorn b1 be run in sequence to Dual ep2500 (the reckhorn there just to boost the signal from the reciever to the pro-amp if needed).

Finally can a standard 15amp circuit even possibly run 2 x1300w for these two and maybe a buttkicker amp as well?

 

[goonstopher]

I just really want to save SOME of the money I put into this!

What do the numbers for the 19ov.02 look like in 4'cu with 1300 watts? Would slightly bigger help to get any lower before EQ?

I might just co-locate them then add a ported sub in another corner -OR- Buy a 12'cu foot enclosure tuned to 17 with 600 watts each. Would that provide more output that 2 sealed subs above and a ported a5-350?

 

[Mike P.]

What do the output numbers look like for this woofer in 4'cu with 1300w?

The sub is rated at 650 watts as shown in the modeling.

Yellow is with 650 watts, no high pass filter required.

Green is the same and 4 db of boost at 18 hz.

SPL.

Cone excursion.

 

[goonstopher]

ED runs their sealed sub with the same woofer at 1300w

 

[Mike P.]

You should verify that by contacting E.D. Who knows, maybe it's a beefed up version.

 

[goonstopher]

I could take my 2 tubes, cut them down - place one down firing and one upfiring sealed back to back (not bi-polar mut each sealed like mktheater had and run them with 600-650 from an ep2500 then add a porter sub on the other side of the room. My concerns with this are:

1. Will audyssey multiEQ xt mess up this odd combo (basically one sub with 2 18" woofer and another possibly single 15" ported)

2. does the EP2500 need a line level booster like the b1? if so does running the b1 and the eq2 inline to the ep2500 present problems?

My other idea is run them as 2 sealed non-colacated and get a buttkicker to add more feeling to the low octaves... I am SO frustated. Any advice if movies are all I care about 98% of the time?

Basically I can spend $1000...my options:

1. collocated up/down firing sealed 19Ov.02's and a a5-350
2. 2 non-collocated 19ov.02 and a buttkicker
3. 2 non-collocated 19ov.02 ported and tuned to 17hz in about 6'cu each
4. 1 co-located dual 19ov.02 in 12'cu to and save $200

 

[Mike P.]

What volume and tuning are the cabinets you have now? Any chance they can be salvaged?

 

[goonstopher]

They cant be salvaged... I simply dont have the patience to make it better or the skill.

I have 2 24.2" (internally) sonos that are TALL - 17' cu internally tuned to 15. I planned to cut them down to the needed size, pull out the port somehow (the flair isn't moving), slap a board on the top, seal the hole off then put the bottom on and the woofer - if they were to be up and down firing I would use thicher board and longer nails ect.

If I keep my cost down on this then I can afford to fix a VERY leaky door which will help with preasurization by a TON (room has an "open" door that suck and is huge, windows and a closet with a bad leaky door).

My concern in making them sealed is, will they do low enough? Can I (or do I need to) run a reckhorn b1 AND an eq2 into an ep2500 without over processing the signal? Finally would using mismatched subs be a problem with audyssey if I decided to go that way.

I could seal them and not collocate and just run them without a ported but I am worried about low level ouput.

 

[tcarcio]

Goonstopper, I just wanted to say that we all started with little knowledge and skill{of which I still represent} and sometimes it get's frustrating. It sounds like you are getting stressed and maybe if you just take a break and then come back to it a little later it might help. I have been where you are and it seemed to help me to do that. To me it's all about haveing a fun hobby and enjoying the process but if it ends up stressing me out it's time for a break. I hope you don't feel like I am out of line and if so I don't mean to be.....Good luck...........:wave:

 

[ironglen]

+1 with TC. , I built a 7" sono, and when the driver came it wouldn't fit, luckily, I didn't wack a hammer into the tube like I did a sheet of concrete backerboard yesterday:wits-end: I would have been out a lot more money than $9:whistling: My wise stepdad always told me the same thing as TC-sometimes it really is the best thing. Sharing the problem with others may help find a solution, and the great people here at HTS are extremely helpful.

 

[Mike P.]

I've been "chatting" with goonstopher, there may be a salvage plan for him.

 

[ironglen]

I've been "chatting" with goonstopher, there may be a salvage plan for him.

I hope it works out.:hail:
This :hail: might just be called the MP icon, short for Mike P :hail:

 

[tcarcio]

I've been "chatting" with goonstopher, there may be a salvage plan for him.

He's getting advice from the right person...:T

 

[Mike P.]

You guys are too generous. I enjoy subwoofers and helping out if I can. I just happen to be in the right place for that combination! :bigsmile:

 

[goonstopher]

Mike has been helping but I am too much at a loss in this. I am going to just cut them down to about 21-22" and have 5ish feet internal volume (working with brett from ED) and have them in individual sealed tubes facing up and down. I'll get another EP2500 and run them with 1200-1300 watts (ED ok'd this). With a boost at 18hz and co-locating them I am sure I will get enough output and it will leave me with some money to fix the 60"x90" leaking, horrible door that will go very far in reducing the amount of space the subs have to pressurize and make my small room act like it should rather than having to fill an entire floor of the house.

I still have questions about the next step.

1. Is spray rubber a good solution to make sure any layer or two of paper that pulled off is air proof? I figure it will seal off any loose ends of the paper I might miss, add to the structural integrity (slightly) and seal the tubes even more. Can it hurt to do this?

2. I have to leave the flairs on, I will take off the ports, can I attach a peice of plywood, or other board, to each individual tube then use a thicker board with very long wood screws to make them into one singular unit that will have woofers facing up and down?

That is my plan so far.

 

[tcarcio]

Goonstopher, go to the last post in this thread, http://www.hometheatershack.com/forums/diy-subwoofers/16335-behringer-power-amplifiers-ep2000-ep4000.html?highlight=ep4000 If you need another 2500 they have a good deal.

 

[goonstopher]

Thanks man. actually BHPhoto is 40 minutes from me and I'll gladly pay the extra $10 for the security of getting it the next day and being able to return it in person if something goes wrong.

 

[tcarcio]

Thanks man. actually BHPhoto is 40 minutes from me and I'll gladly pay the extra $10 for the security of getting it the next day and being able to return it in person if something goes wrong.

Good deal.....:T

 

[Mike P.]

For the amount of work you'll do converting to sealed you could just as well fix the ports and have double the output of the sealed subs. Just my opinion, but whatever you decide.

1. The spray rubber will work.

2. Yes.

Keep us posted on how it turns out. Good luck! :T

 

[goonstopher]

Really it won't be much work. I just need a friend to cut them with me then sand and paint the cap I ruined (which WAS powder coated at a car place...) and screw them together...

Do you think a 20amp circuit could run 3 ep2500's? eventually I want to add a buttkicker and if I can't do that then it makes this a WHOLE lot more confusing