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  1. Replies
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    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....
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    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...
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    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...
  4. 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....
  5. 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...
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    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.
  7. 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.
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    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...
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    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.
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    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...
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    Not all of the files, hopefully the pertinent.

    Not all of the files, hopefully the pertinent.
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    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...
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    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...
  14. 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...
  15. Thread: L65 vs 4430

    by johnlcnm
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    4,198

    I'm also interested in your thoughts of the 4425...

    I'm also interested in your thoughts of the 4425 anomalies. I have modified the pair I have in an attempt to eliminate the flaws that I perceive.

    Regards,

    John
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    Not so sure we are on the same page. I assume you...

    Not so sure we are on the same page. I assume you are talking about the pot marked as 12kHz. You should be able to hear the level change. I sure can on my pair of 4425s. 12kHz is about the limit of...
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    Kai, I have the 4333B. They have the ferrite...

    Kai, I have the 4333B. They have the ferrite 2235, Alnico 2420, and 2405. Should not need a remag. as Martin said. The woofer is what takes a beating from the thump of a solid state amp. That is...
  18. Thread: woofers 4425

    by johnlcnm
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    Richard, It has been a while since I made that...

    Richard,
    It has been a while since I made that measurement. It was definitely a small signal measurement. 100 Ohm resistor in series with the signal generator, and VOM across the speaker input. I...
  19. Thread: woofers 4425

    by johnlcnm
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    I went though quite a journey with the 4425's....

    I went though quite a journey with the 4425's. They had a resonance somewhere around 2kH to 3kH. I replaced the high frequency compression drivers with the commercial 2426H's loaded with new Radian...
  20. Thread: woofers 4425

    by johnlcnm
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    My measurement. I think I made the measurement...

    My measurement. I think I made the measurement with the 2206s. Could be the volume difference between the 2214 and 2206, or cal error in my equipment.
  21. Thread: woofers 4425

    by johnlcnm
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    RMC. I agree with your analysis of the 2214 and...

    RMC. I agree with your analysis of the 2214 and 2206 parameters. The 4425 ports are tuned to 40Hz. The measurement plot shows a check mark response down to 40Hz, which was expected. 50Hz would...
  22. Thread: woofers 4425

    by johnlcnm
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    Alpina, Look at the JBL SR 4722a. Same horn...

    Alpina,

    Look at the JBL SR 4722a. Same horn and driver and hi freq. crossover as the 4425. The pads have been eliminated and the crossover resistors have the PRO power dissipation levels. You...
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    Audiomagnate, I sort of went thru the same...

    Audiomagnate,

    I sort of went thru the same scenario with a pair of 4429s following a thread by Bubbleboy. He measured the LF and HF frequency delay by inverting the phase of the inputs and looking...
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    As Larry said:810298103081031

    As Larry said:810298103081031
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    I found a pair of 4425s a few years ago. These...

    I found a pair of 4425s a few years ago. These were untouched speakers in basically new condition. I never liked the sound of them. Bass was heavy and uncontrolled. There was a resonance in the upper...
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