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Zilch's AK Design Collaborative - Econowave Speaker

Tube King said:
To those using the Parts Express trap cabs, did you use anything other than wood glue to seal up the seams? Did you silicone the joints after the cab was built? Or is that not necessary?
Click to expand...

I used a little caulk on the inside, around the baffle mounting frame and back edges. Not sure it was needed, but I had the caulk already and it was easy.

The instructions never said to use wood glue on the vertical edges of the back wall, but I did that too (that wasn't easy, had to apply glue and work fast before gravity pulled it all down).

Another deviation I did was to make the front baffle removable. Rather than glue it, I got some strip gasketing. Seems to work fine and makes it easy to mess around with the inside of the box.
 
Another Econowave Project (Econo-Kappas) Begins!

This is the thread of the century, yet I will throw in yet again now for the third time wuth my third Econowave project.

I am assembling the components to build up another set of econowaves, my most aggresive yet. Pictured below are the components I plan to use.

2 EV SP 15a woofers (rebuilt with 400 watt vc)
2 QSC 14" x 10" horn lens
2 Rafian 475PB-8 horn drivers
2 19X crossover networks (to be built)
2 Infinity Kappa 9 cabs (expanded to 7 cu ft)

My purpose here was to go tall and narrow with drivers mounted at seated ear level. The back of the Kappa 9 cabs will be expanded out, the baffles pulled and rebuilt to fit only the 15's and horn. I adore the styling of the Kappa 9's- they are something of a statement speaker to my thinking.

The SP 15a's should work well down to the mid 30's with high 95db spl. These have been completely rebuilt with kapton edge wound VC, foam surrounds and smooth cones. The Radian 475 needs no introduction! This is a premium driver by all accounts. I tried the drivers on my 19's and was duly impressed- almost to the point of leaving them there.

Will have to wait a while longer and let fall settle in down here before I venture out into the Texas heat to go to work on these. At least the components are in place for now where maybe I can do some measurements and get the xovers started.

Let the games begin........
DC
 

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...some caulks such as silicone remain flexible, this is good, look for that...be aware that some caulks dry, shrink and crack with age.

...an alternate for sealing the joints is the use of "duct sealant". It is a mastic provided for HVAC work that remains flexible and contains fibers which aid in bridging large gaps.

fastbike: Hello brother :thmbsp:
 
truth seeker said:
...some caulks remain flexible, this is good, look for that...be aware that some caulks dry, shrink and crack with age.
Click to expand...

The sophomoric amongst us might have a field day with this.....
truth seeker said:
...an alternate for sealing the joints is the use of "duct sealant". It is a mastic provided for HVAC work that remains flexible and contains fibers which aid in bridging large gaps.
Click to expand...

Very useful stuff and I much prefer it to silly cone.
 
bwaslo said:
I used a little caulk on the inside, around the baffle mounting frame and back edges. Not sure it was needed, but I had the caulk already and it was easy.

The instructions never said to use wood glue on the vertical edges of the back wall, but I did that too (that wasn't easy, had to apply glue and work fast before gravity pulled it all down).

Another deviation I did was to make the front baffle removable. Rather than glue it, I got some strip gasketing. Seems to work fine and makes it easy to mess around with the inside of the box.
Click to expand...
Yes to all of that. In cases where the woofer is rear-mounted, it's essential to have either the front or rear be removable. Front's easier.

There's also a YouTube video on assembling the trap cabs.

[I can't seem to build 'em that fast, tho. :tongue: ]


dc270 said:
This is the thread of the century, yet I will throw in yet again now for the third time wuth my third Econowave project.
Click to expand...
Always welcome, DC; it's what eWave's all about.

[We'll want pics, of course.... :thmbsp: ]
 
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dc270 said:
This is the thread of the century, yet I will throw in yet again now for the third time wuth my third Econowave project.

I am assembling the components to build up another set of econowaves, my most aggresive yet. Pictured below are the components I plan to use.

2 EV SP 15a woofers (rebuilt with 400 watt vc)
2 QSC 14" x 10" horn lens
2 Rafian 475PB-8 horn drivers
2 19X crossover networks (to be built)
2 Infinity Kappa 9 cabs (expanded to 7 cu ft)

My purpose here was to go tall and narrow with drivers mounted at seated ear level. The back of the Kappa 9 cabs will be expanded out, the baffles pulled and rebuilt to fit only the 15's and horn. I adore the styling of the Kappa 9's- they are something of a statement speaker to my thinking.

The SP 15a's should work well down to the mid 30's with high 95db spl. These have been completely rebuilt with kapton edge wound VC, foam surrounds and smooth cones. The Radian 475 needs no introduction! This is a premium driver by all accounts. I tried the drivers on my 19's and was duly impressed- almost to the point of leaving them there.

Will have to wait a while longer and let fall settle in down here before I venture out into the Texas heat to go to work on these. At least the components are in place for now where maybe I can do some measurements and get the xovers started.

Let the games begin........
DC
Click to expand...

Those should sound great DC. I like both the Radian and the 15a....should kick butt. I know what you mean about the heat. It is not as hot here in Michigan but muggy as hell. We are at 90 degrees and feels like 90% humidity.

Anything I have to do around the house, I am doing at night.
 
I ain't free-loadin' no more...

...and I ain't braggin' either.
Now that I'm a subscriber I feel a duty to challenge the rest of you pretenders to ante up. There's no better place than this thread. Click on the "donate" button down there and share the load.

Will Ya? :yes:
 
How and with what are you guys mounting your crossovers

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Tube King said:
How and with what are you guys mounting your crossovers? Have any pictures?
Click to expand...
I like to use 1/4" threaded rod and bolt them together with the rear baffle. An early pair is shown in the photo. Lately I use one aluminum rod and one brass so I can keep the phase right if the thumb nuts come off.
 
dc270 said:
This is the thread of the century, yet I will throw in yet again now for the third time wuth my third Econowave project.

I am assembling the components to build up another set of econowaves, my most aggresive yet. Pictured below are the components I plan to use.

2 EV SP 15a woofers (rebuilt with 400 watt vc)
2 QSC 14" x 10" horn lens
2 Rafian 475PB-8 horn drivers
2 19X crossover networks (to be built)
2 Infinity Kappa 9 cabs (expanded to 7 cu ft)

My purpose here was to go tall and narrow with drivers mounted at seated ear level. The back of the Kappa 9 cabs will be expanded out, the baffles pulled and rebuilt to fit only the 15's and horn. I adore the styling of the Kappa 9's- they are something of a statement speaker to my thinking.

The SP 15a's should work well down to the mid 30's with high 95db spl. These have been completely rebuilt with kapton edge wound VC, foam surrounds and smooth cones. The Radian 475 needs no introduction! This is a premium driver by all accounts. I tried the drivers on my 19's and was duly impressed- almost to the point of leaving them there.

Will have to wait a while longer and let fall settle in down here before I venture out into the Texas heat to go to work on these. At least the components are in place for now where maybe I can do some measurements and get the xovers started.

Let the games begin........
DC
Click to expand...
You'll love the big woofer E'wave, narrower lobe and collapsing directivity notwithstanding!

Russellc
 
I have not seen the 15" used with the larger lens as yet. See where it takes me! Just gotta have that "big sound" ya know, colapsing my ear lobes and stuff like you said....HA

If it was good enough for Altec tyhen it is good enough for me..
DC
 
dc270 said:
I have not seen the 15" used with the larger lens as yet. See where it takes me! Just gotta have that "big sound" ya know, colapsing my ear lobes and stuff like you said....HA

If it was good enough for Altec tyhen it is good enough for me..
DC
Click to expand...

Check E'wave #4....15 inch JBL 2235H with (NOW) QSC waveguide and B&C DE 250 compression drivers, "deluxe" crossover. I think several have done 2225H and 2226H, and Gordon, Well, he's done about everything! Of course Wayne's 4 PI is similar to the E'wave and uses 15 inch. (With Eminence H290)

Russellc
 
Interesting, have missed the pics of those using the larger QSC wave guides with the larger woofers. Guess the only twist I will have is the Radian driver with the modified EV SP15a driver. I have used the 19x crossover on several project and found it a really good two way (quasi 3 way) network.
Thanks for the info!
DC
 
Tube King said:
What do you mean by "heavy fill"? Are you stuffing the box with fiber fill? If so how much?
Click to expand...
Fiberglass. By definition, "Heavy" is ~60%, i.e., more than a thin layer lining the interior walls.

"Old school" in this regard, I've never used fiberfill, so you'll have to experiment. The purpose is to increase the virtual volume of the cabinet and damp internal reflections....
 
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Tomorrow is the big day. George is coming over and we are building the Array-O-Waves. I bought the 3/4" x 2' x 4' MDF baffle boards last week and today I cut a 4" hole in a scrape peice I had laying around with a 4" hole saw. Screw that! It took a very long time and burned the crap out of the MDF.

I took those peices back to HD and got the same size peices of good old plywood. Will post pics.
 
djnagle said:
Tomorrow is the big day. George is coming over and we are building the Array-O-Waves. I bought the 3/4" x 2' x 4' MDF baffle boards last week and today I cut a 4" hole in a scrape peice I had laying around with a 4" hole saw. Screw that! It took a very long time and burned the crap out of the MDF.

I took those peices back to HD and got the same size peices of good old plywood. Will post pics.
Click to expand...

Plywood would be easier to cut? Didn't know that.
 
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