* 149.5 TL Score on the dash, legal

* Free air testing after the build

We build this sub for a low Fs for a special application to try it out... Fs was 31 Hz after very little break-in so I expect it to settle around 28 Hz or so, dead on with what our goal was.

Still did quite well in the Jeep despite being optimized for another application!

Hmmmm very nice! I know I know...... no 10's! LMAO!

Edited November 5, 200816 yr by Thorshammer

Wow

So whats diff. on these copper coil, softer spiders, headier cone maybe to drop the fs? and what exactly is the custom cooling you can do?

So whats diff. on these copper coil, softer spiders, headier cone maybe to drop the fs? and what exactly is the custom cooling you can do?

Copper coil is almost twice as heavy. It also raised motor force about 50% as you get more windings in the gap for a given resistance (smaller wire). Of course this is necessary to help off-set the higher mass.

The spider is slightly softer than stock as well.

Both of these drop the Fs - the coil mass was the #1 factor, though.

Cooling is a dome shaped pole cover that re-directs air behind the former - works quite well

What tone was used during that test?

What tone was used during that test?

Which test ?

The bench test was Track #18 on Bass Mekanik 5.0

My Jeep peaks @ 50 Hz, that is where we burped it.

Photos of these changes?

Sounds good def sounds like it'll make it a lot better soundin driver even tho I hear they sound pretty good already what's the price dif on these compared to the normal ones.

It is a one of a kind right now - so there is no pricing or anything just yet

So your saying theres a chance! LMAO!!!

So your saying theres a chance! LMAO!!!

We are strongly considering offering a copper coil later on, yes.

It worked wonderfully to give a low FS without losing much efficiency - thanks to the higher motor force.

So your saying theres a chance! LMAO!!!

Thats awesome!! :clap:

^ that is great lol

^ your avatar's great.

Always coming out with something new to make the people happy.

Awesome job.

I was burping my 3000s on it at 1/4 ohm last night. Seems to be quite durable but not as efficient for peak SPL as the aluminum coils - it may like a larger box than the aluminum coil units.

One thing is for sure, the copper coils lowers the Fs ALOT - so would be great for extreme low-end for daily.

Have a pair of them for sale... only two made.

Nearly fresh T/S Specs:

Re: 2.1 ohms (D1 coils in series)

Fs: 30.9 Hz

Qes: 0.48

Qms: 10.0

Qts: 0.46

Vas: 35 L

BL: 22.5

Cms: 43.7 uM/N

BL^2 / Re: 241 (!!!)

Looking for $375 each from these... really only want to sell as a pair.

Have a pair of them for sale... only two made.

Nearly fresh T/S Specs:

Re: 2.1 ohms (D1 coils in series)

Fs: 30.9 Hz

Qes: 0.48

Qms: 10.0

Qts: 0.46

Vas: 35 L

BL: 22.5

Cms: 43.7 uM/N

BL^2 / Re: 241 (!!!)

Looking for $375 each from these... really only want to sell as a pair.

PM Sent

Both custom woofers sold.

Both custom woofers sold.

Jacob, you are insanely fast on the shipping. Even with all the preorders you have been getting out the door, I already have my tracking number for the 15's. Thanks !!! I'll start a build log after the holidays. I'm gonna be swamped until then.

Again, thanks !!!

No problem

If they don't get there intact UPS dropped them off a sky scraper - you will like the packing!

No problem

If they don't get there intact UPS dropped them off a sky scraper - you will like the packing!

Well, it better not be my sky scraper !!! (well, 18 floors if that counts) Yea, I can't wait to see these beasts in person. I thought the E8's were beefy. I think the motors on those were bigger than the ones that my (don't laugh) M&M Godfather 15's had way back in the day. Yes, thats how long its been since I had a system in my ride.

what power was used for this testing? box size? and tuning?