Search:

Type: Posts; User: Shaun M; Keyword(s):

Search: Search took 0.01 seconds.

  1. Replies
    1
    Views
    2,711

    JBL 6290 Factory Mods

    Just been cleaning and testing a late 80's JBL-Urei 6290 Amp. Very stable amp with lots of current. 4 ohm power is double of 8 ohms.

    All the 6200's amps in my ownership seem to have their bias...
  2. Thread: Sagging Spider

    by Shaun M
    Replies
    4
    Views
    2,029

    Sagging Spider

    Does anyone know how to fix a 2225 sagging spider? The cone has also dropped slightly. Thanks

    68627

    ...
  3. Replies
    184
    Views
    108,669

    66325 https://youtu.be/p7Y1cn2dAcE?t=3m37s...

    66325


    https://youtu.be/p7Y1cn2dAcE?t=3m37s
    JBL Concert Series 4850's on the wall at 3:37?
  4. Replies
    3
    Views
    1,577

    JBL 2123 to E110 and Foam Rot

    I have four blown JBL 2123's.Where the foam which was on the pole piece has rotten and got stuck to the voice coil (voice coil rub) and the voice coil had overheated. I managed to source some rare...
  5. Replies
    2
    Views
    2,382

    660026600366004

    660026600366004
  6. Replies
    2
    Views
    2,382

    6599765998659996600066001

    6599765998659996600066001
  7. Replies
    2
    Views
    2,382

    JBL 4716A Refurbishment

    Just doing a refurbishment of two pairs of the JBL Sound Power Series 4716's. Unfortunately three of the 2123's were blown or voice coil rub. The one that works is on it's last legs (Works with no...
  8. Replies
    2
    Views
    1,377

    Thanks. One of the crossover ceramic...

    Thanks.

    One of the crossover ceramic resistors was dead across the woofer which seemed to affect the top end which might explain the lack of top end in the cab. There must be some sort of eq...
  9. Replies
    2
    Views
    1,377

    JBL 2416 Genuine?

    I've just about to replace four 2416 Diaphragms in some Sound Power Series 4716 European Cabs. One was blown and the other three all sounded different to each other. Distorted, low volume and...
  10. Replies
    2
    Views
    2,832

    JBL Concert Series / 4700 Sound Power Series

    Just a few pictures showing my vintage Concert Series 4751. Here in Europe (UK) back in the early 90's JBL produced the 4700 Sound Power Series speaker models which were very similar to the Concert...
  11. Replies
    8
    Views
    3,536

    Things get even stranger now. When I measure...

    Things get even stranger now. When I measure voltage from the bridge rectifier across green and red I'm getting over 100volts DC And the voltage between the two white wires is 18volts AC!??
    ...
  12. Replies
    8
    Views
    3,536

    Many thanks for your help. I've come across...

    Many thanks for your help.

    I've come across some suspect diodes CR14, CR15 and CR16. I will change these soon.

    I have been thinking that it could be a leaky Q23, but will also check and...
  13. Replies
    8
    Views
    3,536

    Hi, I replaced this cap and still have the same...

    Hi, I replaced this cap and still have the same problem. Switch amp on, relay clicks, standby light goes off and then slowly comes back on again after a few seconds but relay doesn't click when...
  14. Replies
    8
    Views
    3,536

    JBL-Urei 6230 Standby Fault

    Hi everyone. I have a JBL 6230 Ampflier which has a fault which im trying to repair. When powering on the relay clicks and the standby light goes off but only for about three seconds. The light...
Results 1 to 14 of 14