JBL 4 Way Build Questions

pennysdad

Veteran and General Yakker
Joined
Feb 27, 2013
Messages
3,697
Location
In witness protection.
Tagline
I've totally lost the plot....
#81
Why so high with your bass/Lo-mid x-o point?
Those 2123's are good right down to 80Hz, not that I'm suggesting you go that low, but I reckon you'd be happier keeping bass doing just bass. Yes? No?
ps: JBL recommend 300Hz, but that's only because all of their boxes only had 1x12" mid so it was a 'power thing', but they would've lowered it if it had 2.
In the end, I bet you'll wish you had doubled up on the 15". LOL. ;)

Lovely job tho'. :)
 
Last edited:

pennysdad

Veteran and General Yakker
Joined
Feb 27, 2013
Messages
3,697
Location
In witness protection.
Tagline
I've totally lost the plot....
#82
Parallel always performs better. With a series connection, your damping factor goes to hell in a handbasket. What you listen to is not real with a series speaker connection.
If I had two tweeters a side, I'd run them in series. Much less costly to fix when something goes wrong.
You'll generally only lose two out of the four.
 

Mohawk

Journeyman
Joined
Oct 29, 2019
Messages
279
Location
Ontario Canada
#83
Why so high with your bass/Lo-mid x-o point?
Those 2123's are good right down to 80Hz, not that I'm suggesting you go that low, but I reckon you'd be happier keeping bass doing just bass. Yes? No?
ps: JBL recommend 300Hz, but that's only because all of their boxes only had 1x12" mid so it was a 'power thing', but they would've lowered it if it had 2.
In the end, I bet you'll wish you had doubled up on the 15". LOL. ;)

Lovely job tho'. :)

I'm gonna' try that indeed !

The specs say "Usable frequency response shall extend from 80 Hz to 6 kHz."

But looking at the fq response I thought I would start around 300

Double 15's you say ?

The wife already thinks I'm nuts....

I do have a set of 2241 18's ..... Soooo many options !

1647856174814.png

Cheers !
 

Attachments

pennysdad

Veteran and General Yakker
Joined
Feb 27, 2013
Messages
3,697
Location
In witness protection.
Tagline
I've totally lost the plot....
#84
Oh noooooo..... Not the 2241's?????? Yeh!!!! Bring it on. Your wife will love you long time. heh heh heh....
I've got 4x 2215 and a 2235 and 2x 18" Turbosound thingies. All running. Even at the quietest moments it's just bliss.
That 2.5dB dip if you x-ed at even 200Hz, will save you pulling it out on your x-o or GEQ.
You really should bi-amp with an active x-o. Then you can tailor it however and whenever you like simply at the twist of a knob...
 
Last edited:

pennysdad

Veteran and General Yakker
Joined
Feb 27, 2013
Messages
3,697
Location
In witness protection.
Tagline
I've totally lost the plot....
#87
Bi-amp you say ?

No way ..... How bout' quad amp setup and a Minidsp 4x10 active crossover / DSP

View attachment 63733 View attachment 63734 View attachment 63735 View attachment 63736 View attachment 63737

View attachment 63739 View attachment 63740

The 700 and one 400 are full WOPL . Gonna have to get Joe to send me some goodies to build out the other 400 and one more 400 that's on the bench patiently waiting to replace that crown amp....

Love this hobby ! :cool:

M
That's just so killer!
Luv it.
Wot is it?
How much is it?
Can I get it for a Mac?
 

krellmk

Journeyman
Joined
Nov 3, 2016
Messages
438
Location
Brooklyn NY
Tagline
Are you satisfied with the life you're living
#90
Maybe I'll add the 2241's for sub duty and use the 15's as mids !
As it is now the top of the tweeter is at about 5 ft

The Wife claims " I'm pushing it " !!!

M
Welcome to the club my wife wife told me the thing
" I'm pushing it " !!!

when i start bringing home these monster amplifiers .. she didn't know i had a Flutterman behind the sofa untill one of the grand kids Woodie the cowboy fell behind the sofa
 
Top