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  1. Replies
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    You can "cheat" using eq. But you would want a...

    You can "cheat" using eq. But you would want a steep cut-off at the bottom end to keep from continually bottoming out the cone due to over-excursion.
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    WinISD says 2240H optimum box is 75.4 litres...

    WinISD says 2240H optimum box is 75.4 litres tuned to 53.3 Hz. You would use two ports .102m in diameter and 150.1 mm long. 2241H optimum box is 302.9 litres tuned to 35.31 Hz. You would use two...
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    Just use WinISD and look at the optimum cabinet...

    Just use WinISD and look at the optimum cabinet size and tuning for that woofer. I'm pretty sure thet 2240 is listed in their library. Then look at the largest cabinet that you are willing to...
  4. Thread: Jbl 4325

    by toddalin
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    1,479

    If the original diaphragms are still in there...

    If the original diaphragms are still in there working properly, and infact 2405 diaphragms, it would be a mistake to change them, especially if the wax plugs are still inplace. An RTA, or sweep...
  5. Thread: Jbl 4325

    by toddalin
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    Interesting find. I'm thinking that a 2402H-5 is...

    Interesting find. I'm thinking that a 2402H-5 is a 2402 "bullet" tweeter with the 2405 "slot" diaphragm to remove some "peakiness" and extend a bit higher. There may be minor changes to the phase...
  6. Even if the foams are shot, unless you touch it...

    Even if the foams are shot, unless you touch it or jostle the driver somehow, they tend to stay intact, especially those that leaned back all of their life (e.g., L200/L300). Touching it will...
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    Use 6.5 cubic feet (unless you can go bigger) and...

    Use 6.5 cubic feet (unless you can go bigger) and use WinISD to calculate the ports. My cabinets were already built (JBL PA clones), and when I ran WinISD on them with the two 5" ports, the lengths...
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    As I said, a pair of 2241s is preferable to my...

    As I said, a pair of 2241s is preferable to my ear, and the RTA, than a pair of 2235s. And I have both to listen too.

    This is the original issue CD played on an Oppo95 through a Yamaha RX-Z9...
  9. Yeah, but I don't think he is around anymore. ...

    Yeah, but I don't think he is around anymore. The paint and body work cost $14K 10 years ago.
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    Buy the 2235 kit, if you can find a pair, but...

    Buy the 2235 kit, if you can find a pair, but leave off the mass ring leaving it a 2234. I wish I would have had this done to mine when I had the 2205s reconed as 2235s. :banghead:

    Ultimately, I...
  11. https://cimg9.ibsrv.net/gimg/www.corvetteforum.com...

    https://cimg9.ibsrv.net/gimg/www.corvetteforum.com-vbulletin/2000x1330/80-80_dsc_0003_3303104f1b8602b8eb893a939482fa1845c43e0b_1c95cf3aba4f568b1974bb8b8c46f09eba541899.jpg
  12. 90977 But why stop there? Use the car to...

    90977

    But why stop there? Use the car to start a whole new "business venture" for parts that were never made but should have been.
    ...
  13. ...OR... Engine was already a replacement...

    ...OR...

    Engine was already a replacement block with non-matching numbers so build the car the way I want. Bring the engine up to ~375-400 hp, with a 3.70 :1 rear end, put in a 5-speed with 0.64...
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    The "suck-out" at ~700 Hz is classic of the big...

    The "suck-out" at ~700 Hz is classic of the big JBL 2 and 3-way horn systems and gives the voices that "veiled" effect. The exponential horns also have other anomolies. This is the reason I got...
  15. I have no experience with a 251J. But I have...

    I have no experience with a 251J. But I have plenty of experience with the 2251J and ~300 Hz is about the ideal crossover point for that woofer, and is where JBL crossed them over in their 4-way...
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    Not bad. This is in the greater LA area. ...

    Not bad.

    This is in the greater LA area. Tempting, but really no room and unnecessary.

    This is for a pair (2 cabinets with 4 drivers) in an interesting arrangement. You just don't see 2245s...
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    I thought that it was very good of them to...

    I thought that it was very good of them to mention that although the speakers have high sensitivity, they may not be ideal candidates for tube equipment. I don't ever recall seeing this...
  18. No clicks on the crossover. It's just continuous...

    No clicks on the crossover. It's just continuous between the stops.
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    Mine are ~15.5 cu ft exterior dimensions. IIRC,...

    Mine are ~15.5 cu ft exterior dimensions. IIRC, they were speced at 12 cu ft interior volume. Shapes varied.
  20. April 2022 Stereophile "Zilch Econowave Speakers"

    For those who read Stereophile, and those who don't, there is a very interesting artical entitled The Devon and Marlow Excitements. Look at the picture on the bottom left side of Page 29. The sharp...
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    Here you go! After all, this is LA. ...

    Here you go! After all, this is LA.

    https://images.craigslist.org/00C0C_cPj6oZDXhy5z_0fu0bC_1200x900.jpg
    https://images.craigslist.org/01313_eQNye8sJ6Phz_0fu0bC_1200x900.jpg
    ...
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    If you listen to Ambrosia, they recorded at Momma...

    If you listen to Ambrosia, they recorded at Momma Jo's studio in North Hollywood on Altec Super Reds. We had rented the studio right after them and some of the equipment was still inplace (e.g.,...
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    Probably the signiture of the horn that can't be...

    Probably the signiture of the horn that can't be helped except with eq.
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    The gentleman who was at OCS now has his own...

    The gentleman who was at OCS now has his own place and he took the magnet gausser with him. He still does the same great quality work.

    http://www.speakerrepairpros.com/
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    Because I have the ability to move the 2251 and...

    Because I have the ability to move the 2251 and Heil AMT relative to the 2241 and each other, I have found that time alignment can make a big difference in frequency response in the crossover region...
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