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

[bluejay29560]

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

Hopefully Ready To Rumble! Digger8 Sub Modified last stages of assembly. Bottom of cabinet w/Infinity 8" sub, inside cabinet, Dayton PR w/29 washers at 1.25 lbs, completed project. Will hopefully be trying it out this weekend. Hope it doesn't explode. Thanks again JSR for your advice....Jaybird4

[DannyG]

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

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[TKanzler]

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

Since I'm building two of these for my HT setup, is there any reason not to use a stereo amp instead of a plate amp in each one? Something like the Behringer NU1000 iNUKE with 300 wpc into 4 ohms?

I realize it won't have a high pass filter built into it, but are there any other downsides? Those BASH amps are a fair bit of change, and I think I'll give them a try with my Acurus A200 (at 300 wpc into 4 ohms) to see how they work before cutting the holes for the amps (and before finishing), but I'm wondering if I can save some money by using a 2-channel amp.

I got the idea from a recent thread where someone mentioned a 1200W pro amp (can't recall the thread, unfortunately - just stumbled onto it), and realized maybe I can source 300 wpc for half the money of two BASH 300's.

Am I all wet here?

Oh, and the Infinity drivers just showed up. :D

[Benji]

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

I don't think I'm qualified to to give a definite so take what I say with a pinch of salt but, I would have thought it would be fine and I thought the iNuke series had the ability to configure filters though software?

[kenrhodes]

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

I am powering my subwoofer with a pro audio amplifier and a mtx car audio crossover for the "filters" It works well and the amp I have is true full range letting me dip in to some LOW frequencies. Do pay attention as some amps have built in sub sonic filters that will limit how low you can play. Good luck and have fun.

[jsr]

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

It'll work fine. Just set up the LPF, and if possible a HPF. If no HPF option, just be careful not to over exert the drivers.

[TKanzler]

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

Thanks. I was thinking an FMOD subsonic filter would be enough, as the AVR supposedly sets the low-pass value in the programming. I believe it's also manually adjustable. The instructions (Yamaha RX-V675 7.2 channel) call for setting the lp filter on a subwoofer plate amp to its highest frequency, presumably so it can take that function over.

The FMOD units are only about $25 for a pair. I don't know if they're even needed, but I'll keep an eye on the subs, FWIW. I suppose filters would be cheap insurance, though.

[Benji]

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

I think I've lost this information somewhere or I'm being blind, what thickness should the wood be?

[jsr]

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

All walls 0.75in. You can mane the baffle 1.5in to fully countersink the driver. HTH.

[TKanzler]

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

All walls 0.75in. You can mane the baffle 1.5in to fully countersink the driver. HTH.

I'm making one side 1-1/2" to recess the AE passive radiator, and the bottom 1-1/2" also, with a down-firing woofer. On legs, to keep it off the floor, of course.

[rhodesj]

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

I just finished my Digger8 build. A couple notes:

I used a M5x.8 50mm bolt on the Dayton PR for adding washers. A #10-32 bolt would probably work as well; the two are very close in size, and are compatible when there's not a huge amount of thread engagement.

I used 35ish 2" fender washers from McMaster here. Home Depot only had 1.5" fender washers, and it would take a stupid number of those to get the weight you need on the Dayton PR.

I had a Dayton SPA250 plate amp and used it on this build. It's hard to recommend just due to how large the Dayton is. It only barely fit on the side of the amp, with less than 1/4" clearance between it and the JBL driver. If the Infinity is any deeper than the JBL, you'd have to adjust box dimensions to get them to fit. I did make my box 1.5" taller to compensate for the much larger internal volume taken by the Dayton amp.

With all that said, it works and sounds great. I'm using it under my basement workshop/computer desk with my Overnight Sensations.

[TKanzler]

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

If the Infinity is any deeper than the JBL, you'd have to adjust box dimensions to get them to fit.

Based on that comment, I figured I'd better take some measurements before I get too far. Since I needed accurate envelope dimensions of the Infinity driver to make sure the bits all fit without interfering, I made a drawing, which is attached. If anyone wants the AutoCAD or dxf block file, send me a PM with email and I'll forward it. It's simplified, but the outside envelope dimensions are accurate. The largest parts, like the shoulders on the motor rubber cover and the basket, were used to make it a worst-case scenario, and therefore also eliminating orientation issues.

[JCSquats]

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

Cannot remember if I thanked you, JSR - but thank you! Mine will be powered by the 240 amp, along with a host of car amps I have sitting around being tested. It does need some spike feet as it likes to dance on my basement concrete floor. Complements my Hitmakers in my office/man cave/gym quite well; I love it!

[Benji]

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

All walls 0.75in. You can mane the baffle 1.5in to fully countersink the driver. HTH.

Excellent, thank you jsr! Getting so close to assembly! I can't wait!

Based on that comment, I figured I'd better take some measurements before I get too far. Since I needed accurate envelope dimensions of the Infinity driver to make sure the bits all fit without interfering, I made a drawing, which is attached. If anyone wants the AutoCAD or dxf block file, send me a PM with email and I'll forward it. It's simplified, but the outside envelope dimensions are accurate. The largest parts, like the shoulders on the motor rubber cover and the basket, were used to make it a worst-case scenario, and therefore also eliminating orientation issues.

TKanzler! That's awesome! Thank you! Will PM you shortly.

[jsr]

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

Cannot remember if I thanked you, JSR - but thank you! Mine will be powered by the 240 amp, along with a host of car amps I have sitting around being tested. It does need some spike feet as it likes to dance on my basement concrete floor. Complements my Hitmakers in my office/man cave/gym quite well; I love it!

Looks great JCSquats! I tried it with a car amp also and works wonderfully.

Thanks TKanzler for the drawing of the Infinity. The JBL is not as deep if anyone is questioning fitment of the JBL version.