Digger8 Sub - diggity dig it all the way to 20Hz

[bluejay29560]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

JSR, I have located a table saw and router, so I will try to make me a true Digger8! Will I need to add internal bracing as I have seen in the flatpack that Tom Jones made? lastly, can I place the Infinity sub downfiring on the bottom 9x14 panel? Thanks again for your help....Bluejay29560......

[bluejay29560]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

JSR, Thanks again. In the 1cu ft box, if the front panel with the 10" cutout is enlarged to fit the Dayton pr, could I then remove the internal bracing leg on the bottom and cut a hole for the 8" sub somewhat toward the rear of the bottom panel for a down firing application. I would like to hide that driver as it is a bit flashy for my tastes. I have already bought it(Infinity Reference 860) by the way. In your design the two drivers are on adjacent panels as this would be. The depth of the pr is only 3.5" and the Infinity is 5 3/16". Since my woodworking equipment consists of a skill saw a jig saw and a drill, a flat pack is appealing to me. I also have no understanding of rabbets and dadoes.
However, I do work for the SC Technical College System and if the 9X14X20 enclosure is the best route, I might try to find a college in the state that has cabinet making as part of their training offerings.
Again, I want to thank you for bearing with me and for all the help you have given me so far. Cheers....Bob

[jsr]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

Actually the 14.25in 1cf box would work if you enlarge the stock cutout to fit the PR and cutout the opposite panel for the active 8in sub. The amp would have to be run externally but that will get you closest to the necessary volume without wasted space and unnecessary work. You'll actually have slightly more volume than needed because the plate amp isn't taking up space but that difference is ok.
In the above setup, you can't do a down firing configuration because the drivers are opposing one another and you shouldn't run PRs horizontally due to sag. If you had enough space to run the active sub on an adjacent wall then yes you could do down firing but that's not the case here.

JSR, Thank you so much for not only your excellent Sub design, but also for your timely response. In the space I have for the sub, a 15" cube works well. How would I best fill up the space to get to a net of .85 cu ft? Do I need to add wood to the sides and top internally, or would some square blocks of wood work as well? What do you think of the down firing sub idea? I very much appreciate your help...

[fastbike1]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

They're not all made like that.

Never really looked at a PR before. The cone are is made of somewhat heavy MDF. Quite interesting really!

[ATTACH=CONFIG]44931[/ATTACH][ATTACH=CONFIG]44932[/ATTACH]

[greywarden]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

If you plan to use a plate amplifier with it, you can build a sub-enclosure ( in your sub enclosure, lol) so the amplifier will be air-tight.

[bluejay29560]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

JSR, Thank you so much for not only your excellent Sub design, but also for your timely response. In the space I have for the sub, a 15" cube works well. How would I best fill up the space to get to a net of .85 cu ft? Do I need to add wood to the sides and top internally, or would some square blocks of wood work as well? What do you think of the down firing sub idea? I very much appreciate your help...

[jsr]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

Unfortunately Tom doesn't seem to be making cabs anymore. The sub flat pack you linked is too large. The Digger8 is designed for a cab with gross volume of 1cf. You could add enough wood or other items inside to reduce the volume to about 0.85cf which is the net volume for the Digger8 but then that defeats one of the design goals for the Digger8, as compact as possible. With only 2 cutouts, the cab is relatively simple compared to say a full speaker. You can buy a sheet of 3/4in mdf and cut it yourself and have a local car audio shop cut the holes for you. You can cut the amp cutout yourself or run the amp externally. The drivers won't be flush mounted but it works. A last resort but at least it's available. Good luck.

[bluejay29560]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

JSR, I have not had luck in getting a reply from Mr. T. Jones for helping me with an Digger8 enclosure. Would this from PE http://www.parts-express.com/knock-d...woof--300-7077 work as well with the pr in the 12" cut out and the 8" Infinity bottom firing behind the pr with some of the bracing removed and a cutout for the sub? Thanks in advance for any help on this.

[JCSquats]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

Never really looked at a PR before. The cone are is made of somewhat heavy MDF. Quite interesting really!

[Beau]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

JSR - you've got email

[jsr]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

Benji,
Yes the 970 is the correct model. I believe I PMd Kevin with my model numbers on that one but can't remember.
The dimensions are 9x14x20. Ignore the box numbers on the bottom. I don't use those so those are default numbers the program opens with.
Good luck and let me know how you guys like them.

[kevin007]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

Leroy R and myself are going to work on my digger 8's since the AE PR is bigger then the Dayton. Lee has everything we need to make it fit. I will also do a side by side comparison with the AE PR vs. the Dayton and compare them as I had built two of them. So we shall see who come out on top

Kevin

[Benji]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

Hey all, got the AE PR now so I have everything except wood ;)




Don't worry, it's not distorted how it looks from the front, I was shocked myself when I saw the pic but I went back and verified it was just the light. Doesn't seem to have any additional weights nor any way of attaching them so I hope the AE PR12-970 is the right one!


Anyway, can I confirm the dimensions of the original Digger8: 9"x14"x20" with 3/4" MDF? I only mention this because I noticed the following on your modelling jsr:



Kevin, how are yours coming along?

[jsr]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

Oh hell yeah! Nik hasn't cut the wood yet so I'd be interested! I have the the AE PR, BASH amp and the REF860W.

Sorry guys. I've been swamped between work and family lately and haven't time to tear apart my Digger8 to confirm fitment with smaller design. It's basically 9 x 14 x 16 in box...a shortened Digger8 with an AE PR (or CSS) and Bash 300 amp. The amp has to have the resistors changed to 15kohms and 220kohms. F3 is about the same as the Digger8 and excursion is better controlled. But again, haven't had time to confirm how close the active and passive drivers are to one another in that size cab.
And I missed getting a Bash 300 while it was on sale to test out the design. I have some MDF sitting around too...just no time to build or even buy the parts.


Kevin,

The AE PR is slightly larger OD than the Dayton, so you might have to enlarge the OD a bit.

[kevin007]

Re: Digger8 Sub - diggity dig it all the way to 20Hz

I just got the AE PR's today. So I will have to check them out when I get home.

I finished the second Digger 8 so I have to do is screw in the PR and it is done.

Hopefully I will have some pics soon.

Kevin

Well hopefully it doesn't take that long for me (knock on wood). I ordered two of them for the digger 8's and I am going to finish the second one. Perhaps Lee we can get together and test them out side by side one with the Dayton PR and one with the AE PR.

The Dayton PR has been giving me problems. The amount of washers hanging off the back some times runs into the brace. And there is a section of the cone of the Dayton PR that bends. The rest of the cone is good, but one section bends as it plays bass notes.

I am hoping that the AE PR that doesn't need added mass will will not have the problem with hitting the brace and that it will be of higher quality then the Dayton.

Kevin