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Big MTM
I posted a few pictures in the other thread but figured I would make a separate one.
I will be making 2 sets of these and both will have the JF-eco608 as mid/midbass and hopefully the JF1204F tweeter in the square waveguide. FR should reach but if not I have plenty of other tweeters to use in the guides.
One set will have the JF-18-835-08 in it and the other the JF-21-1230-08. The ones with 18’s are taken so the 21’s will be for me to play with for a little longer. (Maybe a reason to go to Iowa24). Both will be bi-amp capable but the 18’s will only have a crossover between mid/tweeter because they will have dual XLS 1502’s amplifiers running them which have crossovers.
The 21” cabinets will be full passive crossovers but bi-ample. Both sets will be around 6.5cu.ft. per sub and sealed midrange chambers. These won’t win any awards for anything but the goal is to be a clean as these driver can be and as loud as they can be without 🔊💨🔊💨.
Measurement 50”x23.5”x12
Comments
21” free air bench Dats.
https://www.jfcomponents.com/
21” in a ported test cabinet I have here. 6.0cu.ft.
https://www.jfcomponents.com/
Hell yes, son!
I might have to go a little wider than planned. I can’t sacrifice bracing over volume.
https://www.jfcomponents.com/
Massively cool looking woofers!
Call them Big Moe
I still say Death Stars
How about Macro Grande Utopia
BFW.
Any gamers? I'd call it the BFG.
InDIYana Event Website
I got a little further this morning, as I was waiting for some buffing materials to be delivered.
https://www.jfcomponents.com/
What kind of voltage sensitivity are those two huge woofers? Must be 90+ if not 95 dB/m/w.
Depending on Fs I'd say somewhere between 95-100db.
The Dats are posted already for the 21”
95db 2.83v
FS 28.2 hz
https://www.jfcomponents.com/
Bring em to Iowa Brad!
And I thought my old Peavey Low Rider 18s were beasts. Those 21's put them to shame.
Starting to get tight. 51.5 squares x 16.5 long.
https://www.jfcomponents.com/
Some neighbor is going to hate that!
Rethinking my madness here.
https://www.jfcomponents.com/
Moving forward.
https://www.jfcomponents.com/
Wow!
Man, I wouldn't want to have to move those. My back hurts just thinking about it.
DAYUMM!!
Putting them in a bar?
Not these.. The 18” versions are for someone’s toy shop.
https://www.jfcomponents.com/
Since the 21” is about 20lbs. heavier than the 18” I think this dowel system should work nice as bracing and a way to anchor that monster in.
https://www.jfcomponents.com/
That's impressive! It should work GREAT! I've thought of doing something like that but have never really had huge woofers like that so I passed. Will the mounting screws go right into the end of the dowls?
Yes they will.
https://www.jfcomponents.com/
Nice , double mechanical connection.
Yup, bass assery right there😈👍🏻