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Thread: JBL Performance Series

  1. #886
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    Of course, I'm going to entertain you with every excruciating detail, so here you can read the sides of the boxes. Notice these connect them with the HT Series rather than Performance Series, as the HT Series is where they originally were offered. And not just THX, mfers, but THX Ultra.
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  2. #887
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    Quote Originally Posted by Titanium Dome View Post
    The two HTPS400 subs arrived today. UPS left them where I asked, so I had to lug them down to the dungeon. Arrgh, these little bastiges are heavy for their size (and after two Long Island iced teas). I hope I didn't scratch the trunk on the TC Maserati where, like a moron, I sat them down rather than bend down to the floor.
    Sounds like someone needs to go the gym a little more often. j/k

    On a serious note, I haven't come across a sub that didn't weigh a ton. Not saying there aren't any, just that all mine always weigh a freakin ton.

  3. #888
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    Of the five subs I have there is a light one, a PB12, a down firing sub.
    Of coarse the two sub1500 are the heavyest @ 85 lb, 42 lb for the drivers and 43 lb for the boxes.

  4. #889
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    1m windowed, i.e., quasi-anechoic. Speaker courtesy Johnaec:
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  5. #890
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    Thanks, Zilch. 'Looks about +/- 3dB 80-20K, and substantially flatter over much of that.

    I think you could have made a better choice for the sub, though... (Like LE14H-1 or 3?) Or maybe I'm just not interpreting the last result correctly...

    John

  6. #891
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    I think there is no sub, just the 8" 908Ti as the woofer.

  7. #892
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    Quote Originally Posted by Titanium Dome View Post
    I think there is no sub, just the 8" 908Ti as the woofer.
    OK - I understand now - "nearfield".

    John

  8. #893
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    If you add an HTPS400 for the bottom, you get to add this to the graph.
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  9. #894
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    Quote Originally Posted by johnaec View Post
    Thanks, Zilch. 'Looks about +/- 3dB 80-20K, and substantially flatter over much of that.
    Versus JBL's series of measurements.
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  10. #895
    RIP 2011 Zilch's Avatar
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    Holy patootie!

    Right down to the little pointy dip at 16,557.5 Hz.

    [Was wondering 'bout that....]

  11. #896
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    It takes practice and multiple measurements to come up with anything real meaningful. Just keep measuring at various distances and axis to determine what is real and what isn't.
    Quote Originally Posted by Zilch View Post
    Right down to the little pointy dip at 16,557.5 Hz.
    You would have to determine what is causing that. Google Audax TM025. Look at the Audax website. Measure yours in free air.

  12. #897
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    Since we're being so graph-ic, here's Holt's response graph for the PT800 from his 2002 UltimateAV review, showing on axis to the TM025, +15 degrees (red), and -15 (blue) degrees readings.
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  13. #898
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    Interesting. Thanks.

  14. #899
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    And then there were three

    I took the PS1400 I was using as a LFE unit out of the system. Instead, I daisy-chained three HTPS400s as indicated in the owner's manual.

    The HTPS400 subs are at the midpoints of the front, left side, and right side walls. They're crossed over at THX standard 80Hz.

    At first, the added LFE info was overwhelming, inasmuch as I hadn't done any calibration other than putting the levels at midpoint. Taking out the ol' RS meter, I got the levels right.

    The resultant improvement is quite satisfying. The LFE for HT is quite impressive as is the improvement on the multichannel sound from HDTV. However, the biggest enhancement is in 5.1 surround music, such as DVD-A and SACD.

    Those little bastiges are quite the subs.

  15. #900
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    Breaking it down: why the JBL Performance Series is the flexibility king.

    Stereo Analog: PT800+PS1400 full range left and right speakers.
    PLIIx Wide: PT800+PS1400 full range left and right speakers, PC600 center to 60 Hz.
    Stereo Analog with Bass Management: PT800+PS1400 full range left and right speakers plus HTPS400s below 40Hz.
    Stereo Seven: PT800+PS1400 full range left and right speakers, PT800 left and right surround and left and right rear above 80Hz, plus HTPS400s below 80 Hz.
    5.1 Surround: PT800+PS1400 full range left and right speakers, PC600 center above 60 Hz, PT800 left and right surround above 80 Hz, plus HTPS400s below 80 Hz.
    7.1 Surround: PT800+PS1400 full range left and right speakers, PC600 center, PT800 left and right surround and left and right rear above 80 Hz, plus HTPS400s below 80 Hz.



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