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  1. Replies
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    Try...

    Try https://www.manualslib.com/manual/365594/Altec-Lansing-2200-Power-Amplifier.html

    :)
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    Really, there's not much odd here about any of...

    Really, there's not much odd here about any of the preceding distortion measurements.

    Your measurement ( at 110db ) indicates over 3% which is in line with the other measurements ( yours is higher...
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    I'll guess that the 2225's flux-stabilizing ring...

    I'll guess that the 2225's flux-stabilizing ring has come loose inside the "well" ( down below the ) voice-coil gap ( circling the pole-piece ).

    The thread ( behind the following pic ) shows the...
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    Hi "D" This pic is ( IMHO ) un-necessarily...

    Hi "D"

    This pic is ( IMHO ) un-necessarily cluttered with distortion products that are usually ignored.
    ...
  5. Derek, What you are wanting to do is called...

    Derek,

    What you are wanting to do is called "Passive Bi-Amping" ( versus Active Bi-Amping ).

    Two amps are still used but Passive Bi-Amping uses the speakers builtin passive crossover components...
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    Hi Dhar, I have to imagine that those...

    Hi Dhar,

    I have to imagine that those measurements from Dennis were from an earlier generation of large Heils.

    Here's a comparison of Rob's measurements with those of Hobby HiFi ( I slightly...
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    http://www.audioheritage.org/vbulletin/attachment....

    http://www.audioheritage.org/vbulletin/attachment.php?attachmentid=85653&d=1579105329

    Based on extrapolating the following info ( of three different "on & off" axis measurements ) I would guess...
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    Measure your Heil on axis from a foot away using...

    Measure your Heil on axis from a foot away using a test mic with it's calibration file loaded.

    All those caveats/conditions will change the response that you are currently showing.

    :)
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    Battery Ground is attached to the minus side of...

    Battery Ground is attached to the minus side of the network.

    :)
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    You're welcome! No, your mash-up approach to a...

    You're welcome!

    No, your mash-up approach to a crossover is not reasonable, it'll surely be a mess up ( OTOH , there's no predicting what others are content to call good ;) ) .

    IMHO, you need...
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    Briefly, an autoformer is a tapped inductor (...

    Briefly, an autoformer is a tapped inductor ( coil ) .
    - Within a crossover, it combines the function of an inductor with the possibility of voltage loss ( attenuation ) through the various taps (...
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    The LX13 is the consumer equivalent to the...

    The LX13 is the consumer equivalent to the JBL-PRO 3110 network .

    There are a couple of pairs currently for sale ( on that auction site ). The lowest priced pair is pretty attractive .

    That...
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    Good Stuff here ( from our German + Norwegian...

    Good Stuff here ( from our German + Norwegian members Gibber + oks81 & many others ) about their 2360 experiences ( using various drivers ) .

    :)
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    Here's another thread ( from Jerv ) about EQing...

    Here's another thread ( from Jerv ) about EQing the 2445 on a 2360.

    Note; the 2445 has a couple of db less midrange output than the newer 2446/2450 type driver ( therefore Jerv's EQ advice is...
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    Here's a good thread ( from Barry ) on how to EQ...

    Here's a good thread ( from Barry ) on how to EQ your 2360/2446/2450 horn-driver combo ( for a nice flat, listenable response ).

    JBL 2360, Getting it Flat


    :)
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    Here's where you can get some Aquaplased...

    Here's where you can get some Aquaplased diaphragms ( currently on sale for $80.00 > which is a great price ) .

    JBL D8R2450SL diaphragm from Speaker Exchange


    :)
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    I wasn't able to directly compare Barry's work...

    I wasn't able to directly compare Barry's work with Giskards > it seems to be comparable ( after making allowances for a few obvious differences ) .
    ...
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    A shot of Woody's handy-work for inspiration . ...

    A shot of Woody's handy-work for inspiration .


    http://www.audioheritage.org/vbulletin/attachment.php?attachmentid=51060&stc=1&d=1303429942


    :)
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    Giskard did quite a comprehensive study of...

    Giskard did quite a comprehensive study of different 4" diaphragms placed in different drivers on a few horns ( + most importantly included the 2 different phase plug types ).

    HERE!


    The...
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    Olaf, Don't let the absence of a ready-to-go...

    Olaf,

    Don't let the absence of a ready-to-go HiPass deter you from building a pair of Yuichi 290's .

    Once built, you'll get the help you need ( though you'll want to buy a test mic and a decent...
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    JBL has since inception ( more-or-less )...

    JBL has since inception ( more-or-less ) partially followed the electrical convention where the "Hot" wire is Black while the Neutral ( return wire ) is given some other color .

    JBL ( on their...
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    Good Point ! That 8 ohm Variable Lpad ( once...

    Good Point !

    That 8 ohm Variable Lpad ( once put into action ) moves the HF load impedance towards 8 ohm pretty quickly ( totally over-riding what the actual HF switch says > IOW , yet one more...
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    Weird question . The ( before mentioned )...

    Weird question .

    The ( before mentioned ) resistor is burnt due to those speakers being over-powered ( or the Wattage value of the resistor being too low ).

    :)
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    Hi, The switches do this ( on the N2600 ); ...

    Hi,

    The switches do this ( on the N2600 );

    (A) ( on the Low Pass ) alternates between 1.4mH or 0.7mH .

    (B) ( on the High Pass ) alternates between 3uF or 6uF .

    :)
  25. Edgewound may be out of the business / another...

    Edgewound may be out of the business / another LHF member has had some 128H woofers waiting for a few months ( for service ) all the while with Ken not being responsive to the owners emails .

    So...
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