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  1. Replies
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    impedance stabilizing coils

    How does an impedance stabilizing coil work when connects to the L-Pad?
    What value do you use?
    How do you connect to the L-Pad?
  2. Serial Crossover

    I re-draw your schematic in my circuit simulation. Please take a look if there is any error from your circuit.


    51113
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    18,981

    April fool?

    April fool?
  4. Replies
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    Thanks, 4313B! That's the same curve I saw,...

    Thanks, 4313B!
    That's the same curve I saw, hence the question with the LEAP file.
    No wonder why many resonators/notches were added onto the filters of the network to equalize the 476Be.
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    How come the hi-end drop off that much? Isn't it...

    How come the hi-end drop off that much? Isn't it supposed to be flat beyond 20KHz?
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    Here they are:...

    Here they are:
    http://www.harmanaudio.com/search_browse/product_detail.asp?urlMaterialNumber=4312DBKL&status=
  7. Thread: RIP Zilch

    by CauYem
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    111,687

    Rest in peace Zilch.

    Rest in peace Zilch.
  8. Replies
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    45,813

    Are you talking abbout this >$650K set up?

    Are you talking abbout this >$650K set up?
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    45,813

    Array 1400 at CES 2011

    I voted JBL Array 1400 one of the top 5 best speakers at CES 2011. The speakers along with Mark Levinson gears outperformed many set ups that cost 5-10 times more. Here are the pictures of the...
  10. Thread: What is it?

    by CauYem
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    2,818

    Seller asks for $525/pair with crossover. ...

    Seller asks for $525/pair with crossover.


    49153

    I found another pair on eBay:
    ...
  11. Thread: What is it?

    by CauYem
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    3
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    2,818

    What is it?

    Is this a Coax driver?
    Model?
    Value?:

    49151

    49152
  12. I increase the slope at the low end a bit more...

    I increase the slope at the low end a bit more than 1dB, and here is the new measurement. The sensitivity of the Hartsfield now drops probably to about 93-95dB. Parts used are not the best, but they...
  13. LE15B + 2450SL W/ TrueExtent Be Diaphragm + Compensated network

    Based on data, which Guido & 4313B measured, I built a 2-Way 640Hz Crossover with EQ network to compensated for both Low & Hi to see how the 4" Be diaphragm in a 2450SL driver & LE15B (in Hartsfield...
  14. Thread: The Hartsfield

    by CauYem
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    Woody's Hartsfield today with some minor changes:...

    Woody's Hartsfield today with some minor changes:
    1) New lenses
    2) Replace 075s with 077s (Blue diaphragm)
    3) TrueExtend Be 4" Diaphragms
    4) New Extreme Slope Xovers. Xover points @ 800Hz & 8...
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    :barf: Tweeter: Fostex FT17H ($38.50 ea.)...

    :barf:

    Tweeter: Fostex FT17H ($38.50 ea.)
    Small Horn: P-Audio PH2510 ($22.00)
    10" Woofer: EVM10DLX ($150.00)
    12" Woofer: Eminence 12" (<$70.00 ea.)


    :barf:
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    Jbl 4600

    Jbl 4600
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    Plot of the crossover

    Here is the plot of both response & impedance of the original crossover, and the new circuit, which I removed almost 2/3 of the components used in the original circuit. Dotted line is the response of...
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    I have the 4520 loaded with 2226H. The low end is...

    I have the 4520 loaded with 2226H. The low end is the best I've ever heard, but they are too big for my room.
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    Bo, The current set up I have: JBL 4250...

    Bo,

    The current set up I have:
    JBL 4250 loaded with (2) JBL 2226H
    JBL 2482 driver w/ 2350 horn
    Fostex supper tweeter T90 (this super tweeter can go down to 3KHz)

    Crossover at 550Hz & 5.3KHz...
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    Thanks Bo, so I need to measure the response of...

    Thanks Bo, so I need to measure the response of each case in order to know what exactly the SPL of each config. This would be lot of work!

    Let make it simpler: If I connect (2) JBL 2226H (97dB...
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    Question about sensitivity (SPL) of a driver

    I'm unclear about the result of the sensitivity of a system when a driver is:
    1) Loaded in a box (folded horn...) with higher (or lower) sensitivity
    2) Loaded in a horn with different sensitivity...
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    2482/2350

    I moded my Khorns with a set of JBL 2482/2350 & Fostex T90. Xover at 600Hz & 3.5 KHz. I had L-Pads on Mid & Hi, then replaced them & Tee-Pad using resistors. The back of my Khorns bass bins are...
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    Do you know how much is it for a pair ?

    Do you know how much is it for a pair ?
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    Xover points

    What are the crossover points of your system?
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    I guess you're making RF/Microwave...

    I guess you're making RF/Microwave isolator/circulators. Use pole piece the same size of magnet in between magnet & ferrite. Normally, circular shape is the best. W/O uniform field, electrical...
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