Search:

Type: Posts; User: johnlcnm; Keyword(s):

Page 1 of 5 1 2 3 4

Search: Search took 0.03 seconds.

  1. Thread: Help

    by johnlcnm
    Replies
    27
    Views
    833

    Box Sound Damping. The JBL boxes I have seen use...

    Box Sound Damping. The JBL boxes I have seen use damping sparingly. Usually two inches thick on back and sides. None on the front. The idea is to keep the box Q as high as possible. The T/S base...
  2. Thread: Help

    by johnlcnm
    Replies
    27
    Views
    833

    First, I apologize for another derailment....

    First, I apologize for another derailment. OP-38s? How many cylinders? Question from an X-Birdfarmer. OP-38s used in the carrier, The FDR, back up generator room.
  3. Replies
    26
    Views
    1,246

    I have a pair 4333Bs that have been heavily...

    I have a pair 4333Bs that have been heavily reworked. New JBL diaphragms in the 2405s. New Radians in the 2420s. New charge coupled Nelson Pass crossover for the L300s. 2216nds replaced the 2235Hs....
  4. Replies
    30
    Views
    2,158

    One thing that has become apparent with the Pass...

    One thing that has become apparent with the Pass network, driver integration. I really cannot hear different drivers. Nothing stands out as a three way system. In other words, the sound is not bound...
  5. Replies
    8
    Views
    1,347

    The bass on the 4429's was pretty subdued when I...

    The bass on the 4429's was pretty subdued when I first hooked them up. Took about a year to loosen the suspension up. Bass goes low now. If you look at the mechanical layout of the woofer, you will...
  6. Replies
    8
    Views
    1,347

    I've been living with the 4429's for several...

    I've been living with the 4429's for several years now. I can tell you that they are better built then the classic L series. One inch thick cabinets that are superbly finished. 74 pounds each...
  7. Replies
    30
    Views
    2,158

    Finally checked the polarity. All was good....

    Finally checked the polarity. All was good. Midrange and 2216nd phase reversed. I will re-iterate. The 2216nd seems to be plug and play with the L-pads set to zero. Shot of the crossover mounted...
  8. Replies
    30
    Views
    2,158

    Good advice Ivica. I need to summon help from my...

    Good advice Ivica. I need to summon help from my neighbor to move the speakers from the stand to the floor. I want to pull the woofers and check the midrange polarity again. One of the reasons that I...
  9. Replies
    30
    Views
    2,158

    84822 Good advice Ivica. About 1.5 meters. At...

    84822
    Good advice Ivica. About 1.5 meters. At tweeter level. Still a little sickout at the mid crossover. Stock L-pads are at the zero position.
  10. Replies
    30
    Views
    2,158

    Yes, a lot of interference. The setting is not a...

    Yes, a lot of interference. The setting is not a good one for measurements. Looking at the spectrum, I'm a little concerned about the anomaly at 700Hz. I need to check the polarity of the mids and...
  11. Replies
    30
    Views
    2,158

    Plot of the freq. response with the new 2216nd....

    Plot of the freq. response with the new 2216nd. No changed to the crossover. Measured @ one meter.84815 These sound and measure like plug and play. With Nelson Pass crossovers.
  12. Replies
    30
    Views
    2,158

    It would be interesting to compare these modified...

    It would be interesting to compare these modified 4333's to the 4343's. It can't happen here in the outback, but the folks living in the old JBL stomping grounds might have that ability. This mod....
  13. Replies
    30
    Views
    2,158

    My comments are not from measured data. I did...

    My comments are not from measured data. I did substitute 2216nd's that I had purchased several years ago for the 2235's in a pair of 4333B's. I also replaced the existing crossovers with charged...
  14. Replies
    12
    Views
    1,290

    I have used the Radian diaphragm in both the...

    I have used the Radian diaphragm in both the 4425s and 4333s. It is a drop in replacement with no issues. The replacement JBL diaphragms that I have used are not exactly a drop in. They will require...
  15. And the two 16 Ohms are externally hooked up on...

    And the two 16 Ohms are externally hooked up on the K's. Don't know about the H's. I have an old pair of K's sitting around. External spade lugs on both. Marked Front and Back driver, plus and minus....
  16. Went through the same thing with a 2405...

    Went through the same thing with a 2405 replacement diaphragm. Very poor quality. The supplier did make good on it though. The voice coil former had runs of glue on it. Made it impossible to insert...
  17. Replies
    13
    Views
    1,906

    I transported my 4333's on their backs. Short the...

    I transported my 4333's on their backs. Short the low frequency input terminals. I also taped the ports.
  18. GE Silicone sold at any hardware store. Make sure...

    GE Silicone sold at any hardware store. Make sure it is the non acetic acid kind. AKA silicone 2.
  19. Replies
    46
    Views
    6,893

    I have to agree with Champster on the use of...

    I have to agree with Champster on the use of Crown Pro amps. I'm using two Crown ITEC5000HD's in a biamped system. Amps were used when I acquired them. Both the balanced analog inputs and AES digital...
  20. Replies
    9
    Views
    1,724

    I would be surprised if the archaic 2235H blew...

    I would be surprised if the archaic 2235H blew away the 2216ND! Especially in the lower midrange.
  21. Replies
    3
    Views
    1,016

    The 2206s do have aluminum ribbon voice coils....

    The 2206s do have aluminum ribbon voice coils. That could be the end of your 2206. New ones are still available in the US for $300 US dollars. I don't have a clue what solder alloy you could use to...
  22. Replies
    67
    Views
    17,164

    Not all of the files, hopefully the pertinent.

    Not all of the files, hopefully the pertinent.
  23. Replies
    9
    Views
    1,897

    My guess: Those resistors reduce the rising...

    My guess: Those resistors reduce the rising impedance of the woofer due to the voice coil inductance. Cheaper then using a resistor and capacitor in a compensating network. Sometimes referred to as a...
  24. Replies
    9
    Views
    1,897

    Those look to be original. The diaphragms are...

    Those look to be original. The diaphragms are part of the end cap. Usually the aftermarket junk uses round magnet wire, not flat wire like JBL. That is at least one of the signs that it is...
  25. Steve. You forgot the LSR32's. Now the LSR6332. I...

    Steve. You forgot the LSR32's. Now the LSR6332. I think it is still in production. If you want detail, accuracy, and a load of dynamic range these have it in spades. In the past I have seen the old...
Results 1 to 25 of 114
Page 1 of 5 1 2 3 4