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Derek.

Research the ( discontinued ) Synthesis 3S3 subwoofer. It's passive and uses the well regarded le120h (12" ) woofer that's found in the L7 .
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Speaking of M&K subwoofers, the M&K "Volkswoofer" has quite consistently garnered decent reviews for it's musicality ( which I assume means it faithfully tracks the music and is not just a bloated...

The restoration of the Photo Gallery functions is only partially complete at this time ( from what I see ).

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I notice now that the link to the Photo Gallery is broken ( for me at least ).


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I thought you might like this pictoral-collage ( copied and Google-translated ) from a french forum called ( AudioVintage ).

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LHF member "sebackman" has intimate knowledge about your question ( re; name + diaphragm impedance ).

I believe the replacement diaphragm is now NLA and also, was of unique design.

Can't you...

Ian,

That inferred assumption that I'm not working from real measurement data and advanced software is pretty off-base.

I am using good software and respectable//repeatable files

Granted I'm...

Actually, it's the S4700 and the way it implements of the 2216nd that you ought to be copying for your lowpass ( IMO ).

After a bunch of research I would suggest that RobH3606s lowpass for his...

Hi Ian ( Rob ),

Here's sebackman's comparison of the 2430K ( on an M2 ) vs the 2451SL . The 2451sl is the darker top trace.

90734

While sebackman's windowing makes things somewhat blurred...

Thanks for your comments and updates Dave.

I know from experience how neat it is to hear differences in electronics ( good or bad ).

It really does make audio life interesting ( btw; I biamp my...

@Andreas,

Have you contacted JBL to see if replacements//new-ones are still available?

That's what I would do ( also, I wouldn't be too choosy on colour ).
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@Dino

Economically, IMHO you'll be further ahead if you buy a used pair of Model 19's .

A custom build ( using these following GPA parts ) will push the build up into 5K-6K territory .

GPA...

Scott,

Just what type of file are you trying to upload?

( .frd and .zma files are extremely small > in the kb range ).

Use the export menu within REW to create .frd or .zma files of your...

Same here! ( with a slight upward-tilting inflection on the "E" for emphasis >> though that might well have been the Quebec influence ) ;)

:)

[/QUOTE]

You're welcome guys! I was happy that my WinXP era printer//scanner actually worked with Win10 ( even though it kept insisting there was a USB based connection problem ) ;)

Yeh, that...

And the last one in my possession;

90515905169051790518

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Issue 8 ( I went back to 200 dpi a couple of issues ago ) .

9051090511905129051390514

Interesting ( to me ) is that the scans from the glossy paper issues ( 1 - 7 ) have less over-contrast...

Issue 5;

90506905079050890509

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Issue 4 ( Dec. 1971 );

90502905039050490505


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Here's Issue 3;

90498904999050090501

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Okay, let's try 240 dpi;

90494904959049690497

Auto down-sampling performed by this sites hosting software seems to work well ( it reduces file size something like 4>1 ).

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Here's issue 7 at 200 dpi .

90490904919049290493

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Here's Issue 6 at 150 dpi.

90487904889048990486


Thanks for the help guys

:)

Let's see if these uploads work.

Nope, way too big ( they are multi-page pdf's, scanned at 720 dpi ).

JBLPRO, I'll need an email address from you so that I can send you these files.

Please...

Rob, I don't see any PRO-NOTES" in your link.

( For the sake of clarity ), the JBL "PRO-NOTE" series is different than the Technical Notes series.

The "PRO-NOTE" was available only to dealers...