Wilson Audio Clone build begins!

[Mayhem13]

Re: Wilson Audio Clone build begins!

Well there we have it, a single RSS315HF in 3.5cuft ported and tuned to 22hz........and in keeping with the inspirational......a bottom slot port.

Unless nayone else has anything else to share?

[Wolf]

Re: Wilson Audio Clone build begins!

You could even port it in 2.7 ft^3 if ya wanted to. Look up "Gossamer" by Shawn A, and I am sure you'll find the alignment he used.

And yes- ported is also my recommendation.

Later,
Wolf

[Mayhem13]

Re: Wilson Audio Clone build begins!

Ok, so we've got the alignment out of the way and i pretty sure of the volume ( thx Wolf but since i do have the 3.5 cubes to work with i'll take em!).

Any thoughts on the tune? 22hz looks like a good tradeoff of extension vs power handling. I can always move my sealed RSS390 in for 30hz on down need be.

The other question is the position of the driver on the baffle. I know Paul C has done a few of these types of design so if you're watching? I'll be crossing to the midwoofers at 230hz. The baffle length will be 25" so with the driver offset to the top, i figure on 25" to the center of the top mid and if centered on the baffle roughly 33" to to the top mid. As to floor bounce, i haven't gotta clue but if it helps, the ceilings are 8ft and the distance to the listener is around 15ft. I plan on a flat baffle as in the Alexandria.

[Paul Carmody]

Re: Wilson Audio Clone build begins!

The other question is the position of the driver on the baffle. I know Paul C has done a few of these types of design so if you're watching? I'll be crossing to the midwoofers at 230hz. The baffle length will be 25" so with the driver offset to the top, i figure on 25" to the center of the top mid and if centered on the baffle roughly 33" to to the top mid. As to floor bounce, i haven't gotta clue but if it helps, the ceilings are 8ft and the distance to the listener is around 15ft. I plan on a flat baffle as in the Alexandria.

One thing that's happened to me on several designs with woofers near the floor is that you get gradually more BSC the lower the woofer is placed. There's nothing wrong with this, but I've found that in final voicing of most of my 3-way designs that I have to back off a few dB on BSC or the speakers sound tubby.

The specific amount to back off, I honestly just use trial and error. Using a program like Jeff Bagby's Diffraction/Boundary simulator, you can probably get a more accurate number. But still, I think the final vote goes to the ears. ("If it sounds tubby, it is tubby--no matter what the graph says")

Will you be measuring or modeling these? If you are measuring the one thing I will caution you about is that the floor bounce mentioned above will also play havoc with measurements. Instead of seeing a boost caused by floor bounce, you're very likely to see a null. This can make measurements on the woofer very misleading to look at, or just plain confusing. To get around this floor-bounce null, a lot of guys will measure the speaker outside, and raise it high off the ground to try to get rid of some of the floor bounce mess, and make the measurements easier to read.

If you're not measuring, and just simming, ignore that whole last paragraph and congratulate yourself on dodging a bullet.

[Mayhem13]

Re: Wilson Audio Clone build begins!

Jeff's program indicates the higher up on the baffle the better so, offset to the top/ 8" from the top of the enclosure looks good. That puts the driver's center 19" from the floor......but as you mentioned if it sounds tubby then it is tubby. Thankfully the amp for these has active boundary/eq adjustments.

[Mayhem13]

Re: Wilson Audio Clone build begins!

Ok so we're making some sawdust tommorrow starting with the bass bib/bottoms. I'll be building an MDF shell and a multi-lam hardwood/hardboard baffle from Hickory. I gotta get some use outta this Delta Planer and Jointer. I'll be needing to find a local woodworker to round over the baffle tops and bottoms with a 2" roundover as to reduce diffraction to the lower mid as in the Alexandria and the bottom of the baffle will also be the slot port outlet with a matching 2" roundover on the plinth as the other half of the slot port outlet. It's probobly gonna take all day to straighten out all this Palette wood but hey, it's Hickory...hard, nice grain and color and free!

[Mayhem13]

Re: Wilson Audio Clone build begins!

Well it's been quite a HOT day here in N.J. so work has been slow on the wood prep but managed to get it all planed and smooth. Even got some of the baffles glued up and clamped. I used 1/8" Hardboard in between each layer of wood for some contrast and i gotta admit, it looks pretty not bad! After unclamping on mmonday morn, i'll follow up with some pics. Should be able to get at least one bass enclosure finished by the end of the day. I'll call around to some mill shops and see if i can bring the baffles over for that 2" roundover. If not, on the table saw they'll go for a 45 degree kerf cut. Wasn't planning on sharp edges but hey, it might just look better that way.

[Mayhem13]

Re: Wilson Audio Clone build begins!

Gotta run out and get some new blades for the Table saw and knives for the planer. Man this Hickory crap is hard as nails!

[mattp]

Re: Wilson Audio Clone build begins!

picspicspicspicspicspicspicspicspicspicspics

[greywarden]

Re: Wilson Audio Clone build begins!

picspicspicspicspicspicspicspicspicspicspics

or*11(itdidn'thappen)

[Mayhem13]

Re: Wilson Audio Clone build begins!

They're comin.....They're comin. Just came in to get a glass of H20. REALLY HOT and HUMID here today. Baffles are pretty bad a$$ if i do say so myself.

[mattp]

Re: Wilson Audio Clone build begins!

Baffles are pretty bad a$$ if i do say so myself.

Yeah yeah less talkie more pickie!! :p ;)

[Mayhem13]

Re: Wilson Audio Clone build begins!

Ok so one baffle complete sans driver hole and the second is in clamps. Here's some pix





Have to get back to work tommorrow so i'll putz around in the evenings to finish up the other baffle and mate them to the cabinets. Sortof a puzzle box contruction that i'll outline in pix step by step. The bottom 'slot' is part of the port outlet.

[r-carpenter]

Re: Wilson Audio Clone build begins!

Maaan. Coors Light? I hope you are using that bottle for paint thinner or some other non beer related activity.

[Mayhem13]

Re: Wilson Audio Clone build begins!

Maaan. Coors Light? I hope you are using that bottle for paint thinner or some other non beer related activity.

Hydration only. It was stupid HOT here today.....but you know as your only across the bridges from me. Shoulda had some Guinesses instead then i wouldn't have had to stop for lunch or dinner either.:D