Sub Building Tips by Robot Underground - Adding Mass + High Qts + Swapping BHC / Bolt Hole Circle

[@waltlivernois6241]

I like how much you think wish more American companies were like you

[@brettus9115]

Dayton DATS V3 is their latest speaker tester. I've got the V2 and they're worth every cent imo. I'd recommend a USB microphone (Umik-1 from MiniDSP or a Dayton mic) for anyone interested in this shit from speaker modeling, building to room/car calibration. Keep up the good work mate

[@666nacirema666]

imm6 is good for quick and easy tuning in car. I couldnt get it to work with REW but now that Ive sorted the issues I was suddenly having with my new dats I thnk it was windows blocking it. Have to tell windows specifically to allow apps to use mics now.

[@Beek88]

Always learn something new listening to you. I enjoy your explanations for realz good stuff!!

[@RobotUnderground]

I appreciate that!

[@bg8113]

I love your videos. I really don't understand much but that's why I'm watching. I told myself that I wouldn't ask questions but I guess that I lied to myself. My question is do you do your own winding? I have 3 15" subwoofer's that I burnt the coils on and I wanted to redo the voice coils on. I don't know shit but I have 3 paperweights and I figure why not.

[@RobotUnderground]

That's a whole other monster. There much more efficient men and women making coils on very specific machines. They make a small profit and are of the highest quality. I suggest just buying them online or through I or Lord of Bass. kzbin.info/www/bejne/o4TSg2xuopmei68si=IKk5Rt3MzaVettvq The only exception would be if it's cost prohibitive to buy them where you're at. Like I had some friends in S. Africa want me to send them coils. It was better for them to source the wire from the telephone cable supplier and make their own. kzbin.info/www/bejne/bKLNlHyOlqpqncUsi=8e3ncwmTSA6uwJIH #Thunderdome

[@Gone_X_ing]

Great stuff

[@666nacirema666]

I 3d print jigs to transfer bolt patterns. Got some transfer punches to get it started with the jig then drill by hand using a drill guide or with the press. Works well for me. I should sit down and make some out of metal at some point but this seems to work. Adapter plates would be nicer for some though. Getting tired of all the weird bolt patterns just got something thats like 128x6 or something just barely off from a standard pattern. They even have 3 holes for a standard pattern in the basket. All around strange sub 7" spider non standard coil. I think they were going for making an spl sub actually but then they wanted it to look a certain way so they did the coil leads to the tinsel leads under the cone in a way where theyd be stressed as the sub moves no matter what so they all burnt right there on every one I got. Coils fine though They happen to be selling drop in recones for them so I wonder if was planned. Gonna try to harvest these coils though and use some of the ribbed cones from walmart with them on a standard 4 spoke or maybe one of those beefed up 4 spoke frames people are using with the 9.25" and 8.5" landing. Itll be better than the 6.5" or 7" inch spider that was one these originally.

[@RobotUnderground]

Send me links

[@radiospank]

Can you do a video on DD audio subs? Like their carbon cap and super charged upgrades

[@RobotUnderground]

Yeah those are all bullshit features but they look cool I just don't like how much they charge

[@radiospank]

@@RobotUnderground yea the cone itself is the regular ol paper non pressed, then they throw a carbon cap over the whole thing. Not sure if that helps stiffen the cone more because they use these huge 6 inch caps. The super charged is just neo magnets on the pole and they charge like $150 extra for some glued on magnets lol. However, I did have a pair of super charged 10s I got used and I had to try the snake oil myself to know

[@stanleyspankler5671]

Being a retail installer since the 90s. I wish I had kept motors from subs end up in the shop dumpster. Are kicker rep would stab holes in the sub into the dumpster.

[@RobotUnderground]

lol. yep

[@rc121crx]

Hot shots part deux and cliff bar designs.

[@johnnyh127]

Do you think you may be able to touch on adding dust caps and how it affects the performance of the driver? Such as inverted, large caps that cover the entire cone up the surround, etc. Does any of that make a difference? I feel like it could have an effect on the displacement, but you are the expert. No one ever talks about this.

[@RobotUnderground]

Shape doesn't matter. Surround doesn't make a difference in sensitivity either... Yes, in spite of what Sundown says.

[@MF-vv9ky]

Tiffany style RCA’s 😅

[@rc121crx]

BIGGGGG C WIZZLE

[@Digital7C4]

When adding mass to the woofer, is the only T/S parameter affected the Fs? Does it change the Qts or the Vas?

[@RobotUnderground]

No it changes all of them but the others aren't so important

[@imawesomeyourenot]

Hey Patrick, Just out of curiosity... I saw on another channel (Toids DIY) measurements for The Dayton "Signature Series" and it got me curious. Hes talking mainly about the surrounds geometry and all that blah blah blah, but after looking at the graph presented and the freq responses shown there, im wondering how many of these what i would call very incremental peaks and valleys are perceptible to the ear? Obviously, theyll mean something to actual driver performance...but how much of that actually matters during listening? Im sure it will matter more for mid/full range drivers, but ESPECIALLY on subwoofers I dont see how many of these frequency response graphs unless for actual bass/sub bass (especially at certain crossover freq) will matter. And of course in the car audio world where Bass is the general main focus. I see these "exotic cones", "purposeful" surrounds and "special" spider materials, and wonder how much of it is purely smoke and mirrors? Again, to a point i see certain things benefiting, but in general not sure how much? Hopefully ive explained the above correctly.... TL;DR Whats the point? Specs/responses that are completely a mess will of course matter, but what about barely there peaks and valleys?

[@RobotUnderground]

They aren't in the mids. Maybe in the bass response but that kind of perception has MUCH more to do with, "attack". Like a big motor and lots of electricity, vs an SQ, dainty sub with small magnet and floppy soft parts.

[@RyanBassForLife]

Nice

[@Letsgetlow]

I need an spl sub that is for single digit tones. And an amp with no subsonic filter

[@RobotUnderground]

Good luck

[@Joeykennady]

How do you know what coil to use for a sub? If I have a sun without the coil how big does the gap have to be from the pole and outter plate

[@RobotUnderground]

I'll go over that in another video

[@Joeykennady]

@@RobotUnderground appreciate it !!

[@basshead30]

👍👍👀👀👍👍

[@woodaudio7923]

Need to show us how to ship my recone back to me so i can be ready for a comp on the 19th lol

[@SS-sw8de]

Detached tensile leads on a 15 inch l7/l5, with sagging spider... Any hope?

[@RobotUnderground]

Better to convert to a 12" round sub... Or even a hearty 10"

[@SS-sw8de]

@@RobotUnderground how would I do that with these parts? Or you offer that you're saying?

[@SS-sw8de]

I'm just new to the whole fix it movement and don't have info or knowledge on it. Pardon my questioning.

[@RobotUnderground]

@@SS-sw8de Not at all. I'm just telling you what I wish someone would have told me when I was in your position.

[@RobotUnderground]

@@SS-sw8de I offer it as a kit. Go ahead and text me with your name and shipping address and I'll add you to my phone. Then we can go over your options. 602-312-6504

[@AwesomeBuford]

So if I had the woofer tester, and wanted to lower the Fs to have it play lower all I would need to do is add mass to the cone like this? This would work on any off the shelf woofer as well as long as I beef up the dust cap similar to what you did, correct?

[@RobotUnderground]

Correct.

[@1sickfiestast618]

What product is devils gizz. I’m looking to add mass to a sub.thx

[@RobotUnderground]

You can just use JB weld or some other epoxy it doesn't need to be high temperature or shock resistant the way that Devil's jizz is

[@dizzydezel9899]

Guessing this is the Audio Legion 25?

[@RobotUnderground]

they make something very similar

[@bassheadfoster8376]

​@@RobotUndergroundskar ddx????

[@christopherkuykendall6204]

Hey man look...this has been one of the best channels Ive subscribed 2 in a minute! Because he don't give a damn like me , no filter like me, ...but Mr Underground, Question...I know you know. I don't trust forms or blogs...can you give me the diameters, or steer me in the right direction for a voice coil on A skar ddx 15 dual 2? I don't think it uses the same coil as the SA classic, thanks for the response .

[@RobotUnderground]

Correct You can find the coil on the Lord of Bass website under Alpine D2 type r

[@christopherkuykendall6204]

@@RobotUnderground Thanks A million...helped me out on this one!

[@clittle1559]

But Are they Modified or demodified

[@RobotUnderground]

All sold to happy homes I think I only have one left

[@allmotorhash]

4:10 chinnesium cookie cutter metoo skarsundownwolframdd

[@86royal420]

Thats same frame and motor that the audio legion s25 has

[@RobotUnderground]

Yes, also DS18 and Skar. I've seen the frame on MANY other models.

[@waltlivernois6241]

Subs are really low and not punch y I wish that there was one that could do both😮