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

[Telperion]

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

Does anyone have the exact dimensions needed for the cabinet, bracing, etc? I have no experience in DIY
audio but this project intrigues me due to limitations in my living room on where I can fit a subwoofer.

How much clearance does there need to be between the PR and a wall or entertainment console?

[kevin007]

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

Thanks. I'll look for them.

You can get the specs from this thread. It is the AE 12" 970 PR.

Kevin

[TKanzler]

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

Thanks. I'll look for them.

[kevin007]

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

Is there any reason you can't use a larger steel disk, or something square even, to hold the depth down?

I'm asking because those Digger8 subs are next in line for me, and though I'm not ready to start building, I'll be buying soon, and need to get my ducks in a row early. Before boating season starts. Shop work is my winter hobby, and it's getting late. :D

I would highly recommend the AE PR's and the Infinity driver. If you order the AE PR it comes with the right mass added and you will not have problems with the Dayton PR like I had. Also if you order the AE PR you can make both the driver and PR baffles 1 1/2 thick to flush mount them. That would be a really slick way to go and you would avoid problems right up front.

Also the AE PR will tune the Digger 8 to 18Hz and you will be able to run them more power before you reach xmax. It is better all the way around IMHO.

Kevin

Kevin

[TKanzler]

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

Is there any reason you can't use a larger steel disk, or something square even, to hold the depth down?

I'm asking because those Digger8 subs are next in line for me, and though I'm not ready to start building, I'll be buying soon, and need to get my ducks in a row early. Before boating season starts. Shop work is my winter hobby, and it's getting late. :D

[kevin007]

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

JSR, I got the Dayton PR yesterday and it appears I will need to add a 2" diameter by 1.5" long solid steel cylinder to it's rear to achieve appx 575 grams(1.27 lbs). At this length it will protrude .75 inch out the backside of the PR. Will this much mass cause a torque issue to develop that would cause the PR components to become misaligned over time? Am I wrong about the amount of material(either a solid 2" dia. x1.5" length steel cylinder with hole drilled for bolt or about 40 1.5"fender washers with a length of about 3" needed to get to this 575 gram level? Thanks for any input....Bluejay29560

The biggest problem I had with all the washers hanging off the back end was that they ran into the brace and damaged the PR. It was ruined after that. That is why I went with the AE PR instead.

The bad thing will be if you have to install the AE PR then you will need to enlarge your cut out and if you wanted it flush mount it you would be out of luck as the thickness of the rim of the AE PR is 3/4 thick with a think rubber gasket wrapped around it. You would need a 1 1/2 inch thick baffle to mount it flush.

So starting things off with the AE PR would be advantageous...

Kevin

[Mike220]

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

After hearing the digger 8 i wanted to look into passives. Ordered a css 15" passive for my rss12 hf's and am experimenting with weights at the moment!

[jsr]

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

Bluejay,
I can't remember the corner frequency of the Yung amps. You should be able to find it via a Google search. There's a thread on another forum where the member asked the resistors that need to be change if you want to lower the Fc of the filter.
For the mass, I used various sizes washers from home depot. From what I recall, it protruded about 1.5in or so. But you need a longer screw to attach them as the stock one is too short. You shouldn't need a solid metal tube. Steel washers will add up pretty quickly for weight.
575g shouldn't be a problem for the PR or its suspension. The PR is supposed to be good for at least 600g.

[bluejay29560]

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

JSR, I got the Dayton PR yesterday and it appears I will need to add a 2" diameter by 1.5" long solid steel cylinder to it's rear to achieve appx 575 grams(1.27 lbs). At this length it will protrude .75 inch out the backside of the PR. Will this much mass cause a torque issue to develop that would cause the PR components to become misaligned over time? Am I wrong about the amount of material(either a solid 2" dia. x1.5" length steel cylinder with hole drilled for bolt or about 40 1.5"fender washers with a length of about 3" needed to get to this 575 gram level? Thanks for any input....Bluejay29560

[bluejay29560]

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

JSR, Do you know the LPF that Yung uses on the 200W amp or the 300W amp that you used. The 300W is out of stock until early next month. For best results the LPF should be around 19Hz correct? thanks ......Bluejay29560

[jsr]

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

I'm not sure what the Dayton amps LPF is but the Yung was discovered to have an LPF that's not ideal for the design to reach minimum frequency. However the Yungs aren't that difficult to mod if you feel up to the task. I like the Yungs for their efficiency as they just get warm even when pushing for hours whereas the AB amps will get VERY hot. But the Dayton may have a lower LPF Fc.

And to add to the fun of the Digger8 playing that Kevin's having, I had the same experience of the walking Digger8 running test tones when I was first making the sub. I used an amp with no LPF and it moved the floor (I was upstairs)... fun eh?

[bluejay29560]

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

Hey, Check this out, it looks like a dual Digger8 sub! http://www.youtube.com/watch?v=FBJal0iNHOo ....Bluejay29560

[bluejay29560]

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

Mr. JSR...You Are The Man! I am excited about becoming a member of this Digger8 fraternity. I'll keep y'all updated on the progress. For the same money, is the yung 200 no boost better or the Dayton 250 amp? I know there has been some discussion about filters that I am not sure of. Also Kevin, thank you for your input on the AE pr. I think I'll do as you and start off with the Dayton with the AE as a nice boost down the road. Merci beaucoup guys.....bluejay29560

[jsr]

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

Oops I read your post last night and forgot to reply. I'm running on 30 minutes of sleep so excuse any jibberish that I may say.
Yes you can put the Infinity on the bottom panel. Just raise the PR up the panel so they don't interfere. Yes you need an internal brace. It doesn't need to be as elaborate as Tom's CNC one, anything that connects the sides will work. You can just get dowels and glue them in place connecting the opposing sides and top and bottom panels.
Regarding the PE 1cf box in case you still want that as an option, I'm not sure if there's sufficient space inside the cab to prevent the 2 drivers from hitting one another. I'd be curious myself so if you go this route, let me know.
The Dayton PR isn't as large for the basket as the AE one so it would be eaiser to place closer to the sub, but again I haven't had time to take apart my Digger to check check minium clearances.

[kevin007]

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......

If you check out my signature you will see I built a mirrored pair of digger 8's using the infinity sub and now using the AE PR. I have an internal brace that sits right behind the PR and the baffle is 1.5 inch think since if you want to fluch mount the infinity driver it would require almost 3/4 of an inch to do it.

With the addition of the AE PR I think they really rock. I plan on posting some pics of the converted PR's to give an idea of what they look like. They now go so low and hit so hard that if I do not use double stick tape on the sub my OS MTM's will go flying off in a heartbeat.

My kids love them. Especially my oldest son who is a real basshead. I cannot hear the <30Hz so it is a little wasted on me. But they love it. We played some of those woofer cooker songs from you tube and we shook the entire apartment.

Definitely a killer little sub.

Kevin