Page 2 of 8 FirstFirst 1234 ... LastLast
Results 16 to 30 of 106

Thread: Oh no. I did it. JBL 4520 related

  1. #16
    Senior Member macaroonie's Avatar
    Join Date
    Jan 2005
    Location
    near Glasgow Scotland
    Posts
    2,288
    I'm not going to tell the old ' wide mouth toad ' joke here but Lee I am looking forward to seeing your Smiffy throats.
    Good score on the bins though . cheaper than the plywood alone and with Mojo built in

  2. #17
    Senior Member
    Join Date
    May 2007
    Location
    Ingolstadt in Germany
    Posts
    456
    Quote Originally Posted by Lee in Montreal View Post
    Well, please explain, because PA guys do just that to lower the "reach" of their bass bins.
    Not to mention that any exercise in horn design goes thru the mouth perimeter to define cut-off frequency.
    The flare defines the cutoff frequency, and the perimeter together with the length determines the ripple. In the books I recommended there are plots which show that in much detail (book 1 and 2).

    If You place the 4520 in the corner of a room (1/8 space) then the mouth area is sufficient anyway. If You want to gain something by placement or combining then corner placement is the most effective.

    Ruediger

  3. #18
    Senior Member Eaulive's Avatar
    Join Date
    Aug 2009
    Location
    Back in Montreal
    Posts
    1,289
    Me and my friend helped Lee bring home his new babies (4520) this morning and my friend took posession of Lee's 4530s.

    We hooked them up this afternoon and rediscovered with pleasure the extra tight JBL bass

    I'm off now, got to prepare sand and paint my old 2370 horns.

  4. #19
    Senior Member Lee in Montreal's Avatar
    Join Date
    Sep 2010
    Location
    Montréal
    Posts
    2,487
    Picked mine this morning with Eaulive and Stéphane. Out went the 4530s and in came the 4520s. Spent a few hours sanding and fixing on of the 4520s. Now the paint is drying in my basement. Those things are huge compared to a 4530. . 7" taller, 6" deeper, 12" wider.

    Name:  DSCN0367.jpg
Views: 2741
Size:  196.5 KB

  5. #20
    Senior Member maxwedge's Avatar
    Join Date
    Dec 2003
    Location
    Concord, Ca USA
    Posts
    568
    You're not going to be able to play a record when you have those 4520's powered up!
    I have always like those cabinets but have never owned any.

  6. #21
    Senior Member
    Join Date
    Apr 2003
    Location
    Winnipeg Manitoba Canada
    Posts
    2,291
    Quote Originally Posted by Lee in Montreal View Post
    Picked mine this morning with Eaulive and Stéphane. Out went the 4530s and in came the 4520s. Spent a few hours sanding and fixing on of the 4520s. Now the paint is drying in my basement. Those things are huge compared to a 4530. . 7" taller, 6" deeper, 12" wider.

    Name:  DSCN0367.jpg
Views: 2741
Size:  196.5 KB
    I was kind of digging them in White!!!

    Oh well "back in black"

  7. #22
    Senior Member Eaulive's Avatar
    Join Date
    Aug 2009
    Location
    Back in Montreal
    Posts
    1,289
    Quote Originally Posted by Lee in Montreal View Post
    Picked mine this morning with Eaulive and Stéphane. Out went the 4530s and in came the 4520s. Spent a few hours sanding and fixing on of the 4520s. Now the paint is drying in my basement. Those things are huge compared to a 4530. . 7" taller, 6" deeper, 12" wider.

    Name:  DSCN0367.jpg
Views: 2741
Size:  196.5 KB
    Man, you don't lose time!

  8. #23
    Senior Member Eaulive's Avatar
    Join Date
    Aug 2009
    Location
    Back in Montreal
    Posts
    1,289
    Quote Originally Posted by Eaulive View Post
    I'm off now, got to prepare sand and paint my old 2370 horns.
    Nice
    Name:  5541437335_74bdeb1d42_z.jpg
Views: 2347
Size:  122.5 KB

  9. #24
    Senior Member Lee in Montreal's Avatar
    Join Date
    Sep 2010
    Location
    Montréal
    Posts
    2,487
    Nice horn.
    Nice sticker.

  10. #25
    Senior Member Lee in Montreal's Avatar
    Join Date
    Sep 2010
    Location
    Montréal
    Posts
    2,487
    Quote Originally Posted by Eaulive View Post
    We hooked them up this afternoon and rediscovered with pleasure the extra tight JBL bass
    Yup. The 4530s have a very tight bass, which is not present in the 4520s. Similar design. Different sound.

  11. #26
    Senior Member Eaulive's Avatar
    Join Date
    Aug 2009
    Location
    Back in Montreal
    Posts
    1,289
    Quote Originally Posted by Lee in Montreal View Post
    Yup. The 4530s have a very tight bass, which is not present in the 4520s. Similar design. Different sound.
    No? please explain, more bass extension but less punch?

  12. #27
    Senior Member Lee in Montreal's Avatar
    Join Date
    Sep 2010
    Location
    Montréal
    Posts
    2,487
    More bass extension. Way more. Less upper bass and less kick.

    Here they are now. Installed. I am a happy camper. Until I build a set of modified 4520 for 18" 2240h drivers which go 10Hz lower and shall be a perfect/better match for the 4520

    On the opposite wall, I have a 2245h sub crossed over at 50Hz.

    Name:  4520_fini.jpg
Views: 2401
Size:  163.5 KB

  13. #28
    Senior Member Eaulive's Avatar
    Join Date
    Aug 2009
    Location
    Back in Montreal
    Posts
    1,289
    Quote Originally Posted by Lee in Montreal View Post
    More bass extension. Way more. Less upper bass and less kick.

    Here they are now. Installed. I am a happy camper. Until I build a set of modified 4520 for 18" 2240h drivers which go 10Hz lower and shall be a perfect/better match for the 4520

    On the opposite wall, I have a 2245h sub crossed over at 50Hz.

    Name:  4520_fini.jpg
Views: 2401
Size:  163.5 KB
    Wow, this is better than pr0n

    Mine won't be finished before next week, and my four C8R2225 are in transit somewhere between Northridge and here

  14. #29
    Senior Member Lee in Montreal's Avatar
    Join Date
    Sep 2010
    Location
    Montréal
    Posts
    2,487
    One trick: bolt some casters underneath. They will make your life easier. Loaded, the 4520s are close to 280lbs each

  15. #30
    Senior Member Lee in Montreal's Avatar
    Join Date
    Sep 2010
    Location
    Montréal
    Posts
    2,487
    Received a pair of 2350 and 2397 adapters this afternoon. I made a quick draft and made a pair of adapters to fit some... 104h-2. Currently with open back, but soon with a deep salad bowl as a rear baffle. The result is surprisingly good.

    Name:  2350-2.jpg
Views: 3699
Size:  109.9 KB

Thread Information

Users Browsing this Thread

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

Similar Threads

  1. Lansing-related Patent Parade
    By moldyoldy in forum Lansing Product Technical Help
    Replies: 34
    Last Post: 06-23-2007, 12:01 AM
  2. Various JBL-related Project's I've been working on...
    By GordonW in forum Lansing Product General Information
    Replies: 11
    Last Post: 11-02-2004, 12:39 PM
  3. Kinda JBL related, sort of...
    By Charley Rummel in forum Lansing Product General Information
    Replies: 11
    Last Post: 11-09-2003, 12:04 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
  •