Page 4 of 4 FirstFirst ... 234
Results 46 to 51 of 51

Thread: JBL 4425 Questions : JBL 2416H vs. RAdian 1225-8

  1. #46
    Senior Member DavidF's Avatar
    Join Date
    Apr 2003
    Location
    Sonoma County CA
    Posts
    946
    Quote Originally Posted by Mike F View Post
    "... Sorry for all the questions I`m borderline obsessive compulsive
    Well, then. We will have to work on getting you over the line.
    David F
    San Jose

  2. #47
    RE: Member when? subwoof's Avatar
    Join Date
    Aug 2003
    Location
    fingerlakes region, NY
    Posts
    1,899

    hole in one

    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

  3. #48
    Senior Member Mike F's Avatar
    Join Date
    Feb 2011
    Location
    Montreal, Canada
    Posts
    279

    OEM vs Aftermarket vs Radian measurements

    OEM
    Name:  Left2416OEM.jpg
Views: 2303
Size:  137.3 KB
    Aftermarket Left
    Name:  Left2416AFT.jpg
Views: 2345
Size:  131.7 KB
    Aftermarket Right
    Name:  Right2416AFT.jpg
Views: 2386
Size:  126.2 KB
    Radian
    Name:  Radian.jpg
Views: 2350
Size:  101.7 KB

    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.
    Name:  Radian on axis.jpg
Views: 2289
Size:  116.0 KB

    Notice the differences between the Left and Right aftermarket diaphragms
    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.

  4. #49
    Senior Member 1audiohack's Avatar
    Join Date
    Jul 2007
    Location
    Las Vegas Nevada
    Posts
    3,092
    I'm glad that worked out for you.

    Enjoy!
    If we knew what the hell we were doing, we wouldn't call it research would we.

  5. #50
    Senior Member Mike F's Avatar
    Join Date
    Feb 2011
    Location
    Montreal, Canada
    Posts
    279

    Diaphragm Pictures

    Here are a couple of shots. Chinese on left, JBL on right.
    Name:  Aftermarket vs OEM 2416.jpg
Views: 2707
Size:  62.2 KB

    Radian

    Name:  Radian.jpg
Views: 2530
Size:  69.5 KB

    Hopefully this will help someone in making a more informed decision

  6. #51
    Junior Member notengewirr's Avatar
    Join Date
    Oct 2011
    Location
    Germany
    Posts
    26

    my conclusion after 2 years

    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

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Radian. Worth trying?
    By timc in forum General Audio Discussion
    Replies: 11
    Last Post: 11-26-2009, 11:58 AM
  2. 4425 Verification of Crossover and 2416H compression driver
    By ooppalla in forum Lansing Product Technical Help
    Replies: 0
    Last Post: 06-13-2005, 10:03 AM
  3. Radian vs !JBL diphragms
    By Figge in forum Lansing Product General Information
    Replies: 19
    Last Post: 09-14-2004, 07:23 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •