Well, then. We will have to work on getting you over the line. :blink:Quote:
Originally Posted by Mike F
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Well, then. We will have to work on getting you over the line. :blink:Quote:
Originally Posted by Mike F
just brought a 2416H dia from the shop and it *does* have the tiny hole. a sister one did not though..:)
My take on the 2415 magnet being used for an extended time on the early production runs (4425) was to keep the sound consistent until a wholesale change was made ( network and woofer for the A version ) and POSSIBLY for the short-lived consumer variant...
one of these days I will do a swapfest on the odd magnets here - I have everyone mentioned so far in this thread except the 2418 or 2412 MI junkers.
sub
OEM
Attachment 54608
Aftermarket Left
Attachment 54609
Aftermarket Right
Attachment 54611
Radian
Attachment 54610
Did some measurements between the 3 different models, L-Pads set at -2.5 and -1 db, mid and high respectively.
Only after taking the pictures did I realize those measurements were ones taken with the secondary microphone which was placed 21" inches from the horn and at a right angle.
Here is one shot of the Radian. Microphone 18" and on axis to horn.
Attachment 54612
Notice the differences between the Left and Right aftermarket diaphragms:eek:
While not the most scientific test, it easy to see that the aftermarket diaphragms stink. 10 minutes of listening to them sent me to place an order for the Radians.
I suppose the aftermarket response could be hammered into shape with eq but I figured the 4425s deserve better.
BTW, both left and right Radians measured exactly the same.
I'm glad that worked out for you.
Enjoy!
Here are a couple of shots. Chinese on left, JBL on right.
Attachment 54619
Radian
Attachment 54620
Hopefully this will help someone in making a more informed decision:)
Hi Friends !
now ,after more than two years of swapping between the original JBL Titanium vs the Radian Aluminium :
i prefer the Radian Aluminium diaphragm !
on the little bum cheek horn the original JBL Titanium sometimes sounds little harsh to me and my friend.He own the same 4425 in his Studio and also bought the Radians too , so we can compare the Speakers in our different rooms & equipment !
This little harshness is not audible on every record. For Example there are some good & bad remaster albums and original Cds of the 80s like the Talk Talk / genesis / some New Order / depeche Mode that sounds a bit critical to my ears.
I know, the remaster do not help much on bad records, sometimes it strengthened the critical frequencies.
I often compare such critical Tracks with all my reference Headphones Beyerdynamic T1, Sennheiser HD 650, AKG K701 & SPL Phonitor Headphone-Amp too.
With the headphones this harshness is still there too, but it does not fatigue my ears like the JBL Titanium !
On my Radian this peaks sounds the same forward, same attack etc. but less fatigue!
On our Phonic dB and spectrum meter i can not see a difference in this frequencies !
I think the better sound of the Radian depends on the 'better' damping/decay of the Aluminim. it does less 'ring' ... the reason why Guido coated the JBLs Titanium with Aquaplas....
Perhaps the reason why the outstanding Strauss Monitor SE-MF2 is also equipped with Aluminium Diaphragm ..... ;-)
... no beryllium TAD driver used there ! ;-) i guess this Strauss Se-MF2 Monitor is fitted with JBL Horn combined with TAD Bass-Driver...
But all this BIG monitors are to Big for my small room 16qm with 2,50m listening position :-(
______________________________________________
Because of this "space problem" i will open a new thread about smaller Monitors like 4425, 4312....
i will show you my improvements/enhancements of our 4425 & 4312
regards
Andreas