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Thread: JBL L Series (1990s)

  1. #46
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    Smile In the rack 1 (OT)

    For this multichannel experience I loaded the Haflers, the trusty FAPT1, and the XP50 DVD-A player. The Niles IPC6 controls all the power up and shut down duties. The FAPT1 plus the Soundcraftsmen AE2000 gives a ton of control.
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  2. #47
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    Smile in the rack 2 (OT)

    To deliver a little nostalgia and sanity to the evening, the L100s were driven by the vintage Kenwood stack and Technics turntable.
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  3. #48
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    Smile Spotlight on L7s (2)

    Okay, so the L7s are in the middle of this line up because they have the side firing woofers. The coupling of the drivers' output is an important element of its sound. I created a lot of space around the amps and moved the L7s forward to allow this to occur.

    Here is a look at the left side with drivers exposed. Notice how when properly placed with woofers to the inside the driver alignment is on the inside. If you place them with the drivers aligned to the outside (as some have done) it destroys the sound balance.
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  4. #49
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    Smile Spotlight on L7s (3)

    Here's a shot of the three forward facing drivers. The baffle is a composite material that is canted back for time alignment.

    On top of the L7 is the Pro Co RMS-1, which allows instantaneous speaker switching at any load and any power rating to 400W.
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  5. #50
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    Smile Spotlight on L7s (4)

    With the drivers out of the time aligned baffle, it's easy to see the exacting fit of the openings. The 704G and 708G-1 are housed in closed chambers, while the 035TIA has no restrictions behind it.
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  6. #51
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    Smile Spotlight on L7s (5)

    Down below, after careful and tedious removal of the round grille, the LE120H-1 looks out from its side mounted position. I really like this driver.
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  7. #52
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    Smile Spotlight on L7s (6)

    Once removed, the woofer chamber is revealed. It's got a lot of batting in it, and the speaker enclosure is reinforced and thick on this side.
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  8. #53
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    Smile Spotlight on L7s (7)

    Four pretty drivers all in a row.
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  9. #54
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    Smile Spotlight on L7s (8)

    Here's a side look at driver elevations. In the background are the Technics GX710, Soundcraftsmen 2215-R, Northridge E50s, and XPL160s.

    Oh yeah, I like a little "cream" in my coffee.
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  10. #55
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    Smile Spotlight on L7s (9)

    Everyone knows this driver:
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  11. #56
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    Smile Spotlight on L7s (10)

    The midrange 704G is less well known. JBL lists it as a 5" composite driver. It can still be purchased for around $97. This cast frame driver is a very nice sounding midrange.
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  12. #57
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    Smile Spotlight on L7s (11)

    The 8" midbass driver is the 708G-1. Again, it's a cast frame driver with a composite cone. It's very strong right down to 180Hz.
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  13. #58
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    Smile Spotlight on L7s (12)

    The famous LE120H-1 anchors the system from its side mounted location. Mounting this driver on the side allows for a narrow front baffle, and the inward facing aspect puts both L and R L7s in a position to reinforce each other. This is a both a beautiful thing and a pain in the butt, as positioning, auditioning, and manipulating are all part of the placement process.

    This is one of my all time favorite 12" drivers, and when the L7 is working right with these, it's hard to say that the LE14H-1s in the L250s do any better. In fact, given their narrower frequency output demands, the LE120H-1s sound more articulate to me.
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  14. #59
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    Smile Spotlight on L7s (13)

    Until I got the HTPS400 sub, this L7 woofer grille was the only round JBL grille type I had. In either case, round grilles are a pain in the butt to remove without nicking the cabinet. They're definitely not made to be removed often.
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  15. #60
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    Smile Spotlight on L7s (14)

    There are two distinct networks in the L7. The HF network is attached inside the cabinet near the top of the LE120H-1 woofer enclosure. As it was not worth removing just to take a picture, I stuck the camera inside and hoped for the best.

    The result is acceptable. This network is connected direct to the HF speaker terminals.
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