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Thread: 4345/4343 level positions

  1. #16
    Senior Seņor boputnam's Avatar
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    While we're still running warm on this thread, how do you guys park your 4343's & 4345's?

    No skid marks on the carpet she says!

    ie Straight head, 30 degree toed in , equilateral triangle.
    I'm limited by the wall these must be against - it is only 11-1/2-ft wide (between the door and outer wall), so these 4345's are only 8-ft apart. But, until I move a door over a few feet, that's it. The door is on the left-hand side of the wall, and so the center of gravity, if you will, is shifted right. Therefore, the Left cabinet is about 3-ft off room center line and facing straight on; Right cabinet is about 4-ft off room center line slightly into a corner and angled-in 12.5 degrees (says the protractor), but that's as much to avoid headint-it into a big chair as it is to ensure it centers nicely in the seating area.

    More, in a bit - I've got to run out for a sec...
    bo

    "Indeed, not!!"

  2. #17
    Senior Seņor boputnam's Avatar
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    No skid marks on the carpet she says!
    Back to this. I move these around too frequently - at least when working on them - and haven't left any marks, yet. But, they weigh a tonne (229 lbs., ea).

    The 4245's have a base of 2x2 inch boards, in the shape of a "E". The "E" prongs are flush with the rear of the cabinet, and inset 1" from the cabinet face (sans bevel), and likewise inset 1" on each side.

    When working on the transducers, I slip a hand-truck (some refer to these as "dollies", but "dollies" in-fact are flat and have four-wheels) in from the rear, centered on the middle fork of the "E". I tilt the cabinet back, but leave it on the handtruck. It is simply too heavy and there is no place to get underneath it if you lay it flat.

    Rarely, I slip the handtruck in from the front (after removing the grills) - but I place two thick sheets of cardboard against the face of the cabinet between it and the handtruck for protection.

    Here's what the base looks like, in plan:
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    Last edited by boputnam; 08-23-2003 at 01:06 PM.
    bo

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  3. #18
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    Bo,

    My room has a very similar width, I will try out several positions today.

    By the way, I set up the levels like you said and I like it, you can hear all the details and not too in your face.

    Ian

  4. #19
    Senior Seņor boputnam's Avatar
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    Hey, Ian...

    This pic is almost exactly how things sit - sans the 4313B's. That is a 50-in LCD TV, so having the 4345's snuggled-up on the sides give wonderful imaging with DVD's...
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    bo

    "Indeed, not!!"

  5. #20
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    Bo,

    Now thats damm sexy, are you married?

    I'm inspired.

    Do you play the Corrs a lot when she's out shopping?

    My set up in also across the wall TV in middle (not plasma , If only) but the room is not very deep, about 15 feet so your room maybe deeper. I wide screen is on the agenda.

    I have baby L100's rescued from Ebay at the side rear for LR RR of DVD and have not bothered with Centre as the imaging is good.

    I think set belts on the couch are mandatory for Arnie's movies, whata ya reckon.



    Ian
    Last edited by Ian Mackenzie; 08-23-2003 at 07:22 PM.

  6. #21
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    Okay,

    Here is a very rough frequency response "In room" @ 1.5 metres.
    The curve is unsmoothed and position of the mic was not optimised for smoothest response.

    Actually, I'm gob slaped that its even remotely flat asthe baffle is actually a test Jig at the moment and the slot was sitting atop of the box.

    The temporary baffle for the 2307/08 is made of cardboard so I can experiement with differing horns to locations ..just for fun before I cut the final baffle)

    The levels were at 0 position.

    Ian
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  7. #22
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    Here is the JBL curve,

    Note the resemblance, one can assume that " if " we Lansing Heritage buddys used similar test equipement and conditions our curves would be pretty close.

    Ian
    Last edited by Ian Mackenzie; 08-23-2003 at 11:26 PM.

  8. #23
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    Sorry,

    Operator error...Muhahaha.

    (data courtesy of Greg Timbers, Harman International)

    Actually, I should point out Greg Timbers kindly offered me assistance some time back after emailing JBL for information regarding the tuning of the 2245 in the 4345 design.

    The information Greg Timbers provided and answers to specific questions about the 4345 monitor were not only particularly helpful, but also of a friendly nature and resolved key technical challenges with the 4345 project which I would never have figured out otherwise.

    Ian
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    Last edited by Ian Mackenzie; 08-23-2003 at 11:50 PM.

  9. #24
    Senior Seņor boputnam's Avatar
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    Talk about SEXY!!

    Wow - nice curve, dude!! Thanks for posting the 4345 response!! Interesting impedence kick at 40Hz. And, he's indicated all Lpad's at +2dB. Most interesting, 'course my room will have none of the anechoic charateristics his surely does!

    That's labelled "Page 3 of 3" - what do you 'spose is on Pages 1 and 2...??

    Hey - if there's more you're permitted to share about Timber's advice/comments on the 4345's, you'd find many willing students here in the LansingH Country Club. Possible?

    If they're not, you could pm me, and I'll take ALL and any of it!
    Last edited by boputnam; 08-24-2003 at 10:08 AM.
    bo

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  10. #25
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    4345 EDS

    4345 Page 1/3
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    Last edited by 4313B; 08-24-2003 at 12:38 PM.

  11. #26
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    4345 EDS

    4345 Page 2/3
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    Last edited by 4313B; 08-24-2003 at 12:38 PM.

  12. #27
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    4345 EDS

    4345 Page 3/3
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    Last edited by 4313B; 08-24-2003 at 12:39 PM.

  13. #28
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    4313B EDS

    4313B Page 1/2
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    Last edited by 4313B; 08-24-2003 at 12:39 PM.

  14. #29
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    4313B EDS

    4313B Page 2/2
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    Last edited by 4313B; 08-24-2003 at 12:39 PM.

  15. #30
    Senior Seņor boputnam's Avatar
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    Thumbs up

    I fear only that there is no way to repay the debt. And, you gave-up the 4313B's, too. Whoa...

    Hey - didja notice that 4345 specs the 2421B? Ha! Reminds of a long ago posting exchange...

    AND, that 4313B specs the "Midrange chamber"!! Timing, couldn't be more perfect for knowing that - luckily, the router is idle, waiting on that very decision...

    Too bad there's nothing like it for the 43xx-series Babies, the 4301B. Oh well...
    Last edited by boputnam; 08-24-2003 at 12:19 PM.
    bo

    "Indeed, not!!"

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