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Thread: SAM2LF unboxing... to the bone

  1. #1
    Senior Member pos's Avatar
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    SAM2LF unboxing... to the bone

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  2. #2
    Senior Member pos's Avatar
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    Senior Member pos's Avatar
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    Ok maybe I should have titled this thread "Synthesis 8 unboxing"...

  4. #4
    Senior Member martin2395's Avatar
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    The first thing I thought when I saw them was - JBL L75 Minuet!

    What is it, a center speaker?

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    Administrator Mr. Widget's Avatar
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    Quote Originally Posted by martin2395 View Post

    What is it, a center speaker?
    It is the LF portion of the Synthesis Array system. You use one or two of these modules with a SAM1HF, which is the same horn and drivers used in the 1400 Array system. Typically you use three of these and their HF companions as the LCR of a home theater.

    TiDome and others are using these in their home theaters.


    Widget

  6. #6
    Senior Member Champster's Avatar
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    Congrats! Thanks for the pictures.

  7. #7
    Senior Member pos's Avatar
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    thanks

    I updated post #2 with an additional picture to make the intend of this unboxing clearer


  8. #8
    Senior Member martin2395's Avatar
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    Quote Originally Posted by pos View Post
    thanks

    I updated post #2 with an additional picture to make the intend of this unboxing clearer
    So you only want the units and throw away the cabs?

  9. #9
    Senior Member grumpy's Avatar
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    Lol... Hope you got a good deal; they -are- nice drivers. Plans?

  10. #10
    Senior Member pos's Avatar
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    Quote Originally Posted by martin2395 View Post
    So you only want the units and throw away the cabs?
    That's correct
    The drivers where basically double boxed, with a MDF inner box...

    That is the only way I found to get hold of these drivers.
    I was on the list when member 4313B did try to obtain a few pairs almost 5 years ago (!), but the deal fell short at the last minute because JBL refused to sell them.

  11. #11
    Senior Member pos's Avatar
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    Quote Originally Posted by grumpy View Post
    Lol... Hope you got a good deal; they -are- nice drivers. Plans?
    Gotta do what you gotta do...

    Impressive drivers indeed: http://www.audioheritage.org/vbullet...34-Synthesis-8
    Arguably the best hifi 8" driver JBL ever produced, and probably among the very best of any brand.
    They are very similar to the SEAS magnesium drivers, but with a more consistent response IMHO (and better looking).

    The plan is to use them in place of some 112H (found out that they had aftermarket VC's in them, and of course C8R2108 kits are unobtainable...) in my small 3-way project:
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    Unfortunately the frame shape and bolt pattern is not the same as the 112H, so I will not be able to switch back if I ever get the 112H up and running again ... :/
    I also have a pair of 2250HPL I wanted to try (with a lot of EQ), but they have the same frame as the 112H. Oh well...

  12. #12
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    At what frequency do you plan to cross from the 8s to the waveguides, Thomas?

    Francis
    Oppo BDP-95 DCX-2496 RMX-850 Parasound A21 First Watt J2 Dayton RSS390HF-4 MTM Quads of SEAS W18E001 511Bs TAD TD-2002

  13. #13
    Senior Member pos's Avatar
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    Hi Francis

    The initial plan was 2kHz with the 112H, but I might try to reduce that a little bit with the synthesis, to avoid any problem with the 5kHz breakup peak (reflected as a ~1.7kHz 3rd distortion peak).
    Those metal cones are nice but hard to work with (you know that )
    The 6" PT waveguide is already struggling to control directivity at 2kHz, but the directivity match with th 8" should be good enough anyway.

  14. #14
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    Quote Originally Posted by pos View Post
    Hi Francis

    The initial plan was 2kHz with the 112H, but I might try to reduce that a little bit with the synthesis, to avoid any problem with the 5kHz breakup peak (reflected as a ~1.7kHz 3rd distortion peak).
    Those metal cones are nice but hard to work with (you know that )
    The 6" PT waveguide is already struggling to control directivity at 2kHz, but the directivity match with th 8" should be good enough anyway.
    Yes, the metal cones have their challenges. You've set yourself a tougher job than mine though, since I'm crossing at 800Hz. You may need a fairly high order crossover (like LR4). Perhaps if you cross at 1.7kHz (at -6dB), that will work out.

    Francis
    Oppo BDP-95 DCX-2496 RMX-850 Parasound A21 First Watt J2 Dayton RSS390HF-4 MTM Quads of SEAS W18E001 511Bs TAD TD-2002

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    Senior Member Valentin's Avatar
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    seems like the same basket as Revel Ultima 8 inch drivers

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