We go inside the "upper floor" of this two compartment floorstanding speaker. Removing the crossover, mid and tweeter, refurbish the enclosure, and a bit of soldering the new capacitors into the crossover.

Comments

    • Pimplaren
      Pimplaren

      Hey! Nice work and great videos! Where does that secret 3uF capacitor go on the crossover? =) you should have pointed out it !

      about 9 months ago
    • AgentJayZ
      AgentJayZ In reply to Pimplaren

      Well I found it by the process of elimination. I identified all the ones by their markings, and there was one left...

      about 9 months ago
    • Martin D A
      Martin D A

      I've worked in audio for 30 years and seen most everything, and those are impressive drive units, beautifully made.

      about 10 months ago
    • steal threaded
      steal threaded

      someone stabbing that speaker hurts my soul

      about 11 months ago
    • buckaroobonsi555
      buckaroobonsi555

      Why would you leave the old caps on the board? All it can do is leak and ruin the board! It does not add to the value of the speaker to leave old parts on the board!

      about 11 months ago
    • AgentJayZ
      AgentJayZ In reply to buckaroobonsi555

      They are wax and paper, so no leaking. I wanted to preserve the history for the future. If these speakers don't end up in a landfill when I die, I want the next person who refurbishes them to know what they looked like when they were new, in 1978.
      Your opinion is valued.
      The value of these speakers is mainly to JBL fans and collectors, and i think they would be interested in the original configuration.

      about 11 months ago
    • FrontSideBus
      FrontSideBus

      Some quality tunes playing in the background there... :) Did you service the pots with some contact cleaner while you had it out?

      about 1 year ago
    • Juke Joint
      Juke Joint

      That is one high dollar crossover...

      about 1 year ago
    • Rob Butterworth
      Rob Butterworth

      Thank You so very much for this video Sir. I have several of the large vintage JBLs and I've always loved the L220. The passive woofer design is a personal favorite of mine. Because of this video I now have the confidence to replace the capacitors in my pair. Again, thanks for sharing.

      about 1 year ago
    • Mike Hinman
      Mike Hinman

      Those 076 horns have become so rare. When JBL stopped making them, Westlake Audio acquired all of the remaining inventory for their studio monitors. You've done a beautiful job!

      about 1 year ago
    • Michelle Powell
      Michelle Powell

      love the choice of music.

      about 1 year ago
    • TheRockerxx69
      TheRockerxx69

      Brace. Add mass and dampen the baffle. ! You are lucky that you can open from the back. Those were made in LA, not China

      about 1 year ago
    • St. Vintage
      St. Vintage

      Nice job well done, keep up the good work! Also great presentation!

      about 2 years ago
    • Mark Lawless
      Mark Lawless

      I love what you're doing here. I do wonder about these speakers though. I use to sell JBL speakers back when these were new. I did all I could to make these sound good. Placement and what ever adjustments I could make. Never could make them sound flat. We also had the L212 with sub. I loved the sub but never could get the L212 to sound flat either. Have you done any measurements with these. I can say that with certain rock music they would sound fine. But I've always tried to go for more accurate sound. I do wonder if you have had more success making these speakers sound somewhat accurate?

      about 2 years ago
    • Scott Hill
      Scott Hill In reply to Mark Lawless

      You really could not have said that any better. I agree with you 100%. It's just like art. One person will hate it, while another loves it. It's all subjective.

      about 2 years ago
    • AgentJayZ
      AgentJayZ In reply to Mark Lawless

      What are speakers for? What is music for? To be enjoyed.
      Since I've started learning to play guitar, I have been laughing at all the "audiophiles"... I used to be one.
      Musicians perform, and the try to sound good. They like it when they sound good. Good is a subjective term. If you like it, you like it.
      So what if you perfectly reproduce a recorded performance... The next performance on the next day will be a bit different.


      These speakers rock the house, are loud like a live band, and allow me to hear things I have never heard before in my favourite songs.
      They are incredibly good sounding to me, and that's all that matters.
      Cheers!

      about 2 years ago
    • Tamás Tóth
      Tamás Tóth

      Hello!

      I would like to inquire in video 06:55 minutes you use what kind of sandpaper?

      Thank you very much!
      I look forward to your response!
      Best Regards, Tamás

      about 2 years ago
    • Tamás Tóth
      Tamás Tóth In reply to Tamás Tóth

      You're right!
      Thank you very much! :)

      about 2 years ago
    • AgentJayZ
      AgentJayZ In reply to Tamás Tóth

      You asked me a question and I gave you a very detailed answer. If you are asking again if that is my answer, then I will answer that question by saying yes, that is my answer to your question. Any questions?

      All you need is something with a spongy texture, and containing an abrasive that will work on the aluminum. Some experimentation may be required, but there are many choices here.

      about 2 years ago
    • Tamás Tóth
      Tamás Tóth In reply to Tamás Tóth

      Thank you very much for your reply!
      The video is exactly the same that you use? "Scotch-Brite ™ Extra Duty Hand Pad 6444"?
      The 6444 is very expensive!
      I would like to use the JBL LE5-2 mid speaker abrade.
      I looked on eBay, Scotch-Brite™ Hand Pad 7447 much cheaper.
      The question is whether it will be appropriate?

      Thank you very much in advance!

      about 2 years ago
    • AgentJayZ
      AgentJayZ In reply to Tamás Tóth

      It's an abrasive pad made by 3M. It comes in different grades of abrasiveness, each a different color.
      We call it the red stuff, but I just looked up the official name: Scotch-Brite™ Extra Duty Hand Pad 6444

      Nice thumbnail. I only recognize the 4311, but they all look great.

      about 2 years ago
    • sam robinson
      sam robinson

      CROWN amps in the shop, very nice!

      about 2 years ago
    • ipullstuffapart
      ipullstuffapart

      So much awesome, legendary music in this video.

      As for the replacement cones - it will mostly be cosmetic. As for the sound; other factors such as speaker placement, acoustic treatment, etc, will make more of an effect than new cones. The drivers of the L220 have a rather high strength motor (Bl) and a low mass cone (Mms), meaning that the extra mass will slightly lower the Fs of the driver, creating a slight low frequency peak – but it will be almost unnoticeable. Sure it will look nicer, but I couldn't justify the cost either.
      It's great watching a Jet Tech work on some audio gear, very refreshing.

      about 2 years ago
    • AgentJayZ
      AgentJayZ In reply to ipullstuffapart

      Yes, I can confirm that these speakers with the original, repaired cones... can literally shake the house. Thunderous bass is always fun.
      These units were THX ready before THX was even a thing.

      about 2 years ago
    • bozmr2
      bozmr2

      "Another Dam List" is the most Canadian thing I've seen in a long time. I lol'd.

      about 2 years ago
    • ChiefBridgeFuser
      ChiefBridgeFuser

      If there could be a parody of Red Green's Handyman's corner this would be it, bopping out the crossover wit a broom handle except it was a great idea and it worked. You do some fine work, sir!

      about 3 years ago
    • AgentJayZ
      AgentJayZ In reply to ChiefBridgeFuser

      +ChiefBridgeFuser First time scary, then always fun.

      about 3 years ago
    • Vampira
      Vampira

      Your solder work looks perfect to me.

      about 3 years ago
    • PacificAirwave144
      PacificAirwave144

      Love the background music :-) I look at the mass and the machining of that horn...and just think wow--It looks like early microwave stuff. Back from the days when the engineers ran the company and 'quality' sold product.

      about 3 years ago
    • MrGuvEuroman
      MrGuvEuroman

      Jees, buy some proper wire strippers!
      Them dollar store ones will stress the cable and may even snap them internally.

      about 3 years ago
    • Turning Short Final
      Turning Short Final

      Neat video! Maybe censor your home address? (It's on the paperwork you showed us).

      about 3 years ago
    • philzambo
      philzambo In reply to Turning Short Final

      +AgentJayZ Brilliant stuff, I love this shit, I've been an audiologist for thirty odd years

      about 3 years ago
    • AgentJayZ
      AgentJayZ In reply to Turning Short Final

      Nothing to hide.

      about 3 years ago
    • Darren Duncan
      Darren Duncan

      Nice solder job. You may have to re-cone the woofers & P.R.s but that system should last you into a retirement home! Hope they have a dedicated 20 amp circuit for your amps! ;-) Enjoying this series & thanks for sharing.

      DD

      about 3 years ago
    • Chuck Stephens
      Chuck Stephens

      A series a didn't expect here, but I really enjoyed it. I always about how drivers were re foamed.
      As a Speakerlab guy, my vintage drivers' surrounds are lovely butyl rubber, not air filled foam!
      Thanks for documenting your project!

      about 3 years ago
    • 20bluebug
      20bluebug

      You did right using the "fancy" capacitors....some speaker companies use the standard electrolytic ones...which are ok and do work..but not the best ones to use in speaker crossovers.I like the tweeter horn....JBL's modern version of that horn doesn't look as nice...I believe they now use a modern version of that compression driver in 3 different models of tweeters. You may already know this...but if you want to clean up the nick on the phase plug. with a bit of force, it will unscrew from the driver, there is a rear "stub" in back of it that you can use to mount it in a lathe and with a bit of sand paper you may be able to clean up that nick.

      about 3 years ago
    • inthepocket
      inthepocket

      Try a glass plate with a sheet od 800 grit wet dry paper next time. Flat and true.

      about 3 years ago
    • DiveTunes
      DiveTunes

      Nice. I played bass in my brother's band, and he ran a speaker/cabinet company. For performance, we didn't use cross-overs in the cabinets, but tri-amped power--way back at the mix-board. Separate the frequencies at source level, give them their own specifically tuned amp, send power to appropriate speakers. Worked well, but expensive for home.

      about 3 years ago
    • Achim Hanischdörfer
      Achim Hanischdörfer

      13:23 ACDC TNT
      Hell YEAH!

      about 3 years ago
    • Aidan Brown
      Aidan Brown

      Well I didn't think I'd see speakers on your channel agent jay z, but I love watching them anyway

      about 3 years ago
    • AKLmfreak
      AKLmfreak

      By the way, i followed along and found the mysterious unmarked capacitor sitting smack in the middle of that crossover schematic. I also noticed the nominal impedance of the HF driver was listed as 16Ω on the schematic but the sticker on yours said 8Ω.  Oh well, as long as the model numbers match up.  Have you ever come across any oversights like this in any of your turbine engine documentation?

      about 3 years ago
    • AgentJayZ
      AgentJayZ In reply to AKLmfreak

      +AKLmfreak In the RR manuals, there are many, but I believe they are put there purposely to screw with any independant shops. I could very well be biased, but that is my experience.

      about 3 years ago
    • Mekhanic1
      Mekhanic1

      mentor, Ohio!

      about 3 years ago