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10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

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  • buzzforb
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

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  • Navy Guy
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    The a attachment isn't showing up. It's just a blank white square.

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  • buzzforb
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    HEre are the two options. More and more I am leaning towards the 2 way. If I love the sound, I will probably do a 3 way with the 18-I version of he C Quenze, the newer releases of the TL tweeter, and some yet un-named woofer, probably a TD10.

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  • buzzforb
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    If I cross the AT to a woofer like the Beyma or AE TD series, should be able to keep the sensitivity up in the 87-88 range.

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  • davepellegrene
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    I was just thinking about how much difference it might make using the tweeter/ waveguide combo in a system that is 82-84 dbs sensitive vs. 88-92 dbs. In the lower sensitivity system the tweeter is not working as hard and you can get away with a lower crossover vs the high sensitivity system your pushing the tweeter harder so at higher SPL's it might get harsh. I suppose that would be easy enough to test with a distortion test.

    This might have something to do with the fact I find it sounds better to crossover slightly above the cut off of the waveguide.

    Or maybe I'm just making things up.

    I am getting ready to work up a new guide using the TB75-1558 with an optional tweeter combo guide. I'm getting ready to purchase the Eminence Deltalite II 2512 to cross with the TB75. Hopefully I'll be able to swap out tweeters using the same mold with just a throat adjustment.

    Dave

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  • buzzforb
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    7 x 5. I am wanting to move the crossover up, just as you and Pete suggest. The Beyma can do 2K, it just doesn't blend well.

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  • davepellegrene
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    With that size guide, 7x5, I always seem to end up closer to 2.0kHz before I think it sounds right. Might be different with the N26C but with other tweeters I try to cross in the 1.6 kHz range I always end up moving them up.

    Dave

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  • buzzforb
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    exactly the plan. THe Beyma can be pretty flat to 200-300 with a nice slow roll-off below 50Hz. F10 is in the low 30's and F3 is mid 40's in a 1 cubic feet and move more air than most 8" available that can achieve same SPL.

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  • Pete Schumacher
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    Originally posted by buzzforb View Post
    I think you are right on this as i noticed some hash when trying this on one Xover attempt. As wierd as it may seem, I think FR drivers have ruined me for this type of speaker. While things are blending pretty good, i cant say i would want to live with this speaker. I dont like the crossover in this region and hope to try the AT today. With it, i will be able to push the crossover up to the 2.5-3K region. See how i like it. The Beyma is a great midbass speaker. Really nice snap and punch to it, but this seem to carry over in a not so good way to violens and other stringed instruments. May be the implementation. I bet if used in a sealed box crossed to a SEOS, it might be really nice, as you could push the crossover down further. It has the extension to go higher, i just dont like the sound on a longer term basis. As for the TL labs tweeter. I have zero complaints. I have heard details out of this tweeter that i have not heard on any other that I have listened to. I can say it is on the level of ribbons i have heard. Speaker building is tough
    You'll like the AT, but keep the crossover down where you have it. Letting that excellent tweeter handle as much work as possible is a worthy goal. If you can set up a crossover like the one I posted it should allow the 1500Hz XO point.

    Instead of using the AT in place of the Beyma, think about adding it to the mix and use it as a mid from 300Hz to 2000Hz.

    Your assessment of the qualities of that TL N26 mirrors my own. It's a very resolving little dome.

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  • isaeagle4031
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    Are you testing at 1k or 10K? That could be the difference.

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  • buzzforb
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    Can i trust the DATS woofer tester in terms of Le measurements? It is showing the C Quenze 18h as having an Le of .7 vs .15?

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  • buzzforb
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    I think you are right on this as i noticed some hash when trying this on one Xover attempt. As wierd as it may seem, I think FR drivers have ruined me for this type of speaker. While things are blending pretty good, i cant say i would want to live with this speaker. I dont like the crossover in this region and hope to try the AT today. With it, i will be able to push the crossover up to the 2.5-3K region. See how i like it. The Beyma is a great midbass speaker. Really nice snap and punch to it, but this seem to carry over in a not so good way to violens and other stringed instruments. May be the implementation. I bet if used in a sealed box crossed to a SEOS, it might be really nice, as you could push the crossover down further. It has the extension to go higher, i just dont like the sound on a longer term basis. As for the TL labs tweeter. I have zero complaints. I have heard details out of this tweeter that i have not heard on any other that I have listened to. I can say it is on the level of ribbons i have heard. Speaker building is tough

    Leave a comment:


  • Pete Schumacher
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    Even though the 6dB network "works", I'd still shoot for a 2nd order filter just to make sure that tweeter isn't going to be strained at all.

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  • scholl
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    Originally posted by buzzforb View Post
    This is one of the areas that was addressed. Between the room, diffraction, and slightly higher Le than spec'd, the woofer was the battle. diffraction combined with natural reponse caused a wide peak in the 250-550 region where it thrn drops off to a fairly flat shelf. I am interested to measure as the changes were made just from listening.
    Sounds like your experiencing the troubles of two way stand mount design. I've found a threeway with woofer on the floor crossed 400hz +- helps with the various floor, wall ceiling issues and can deliver a fairly smooth response up to the crossover.

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  • craigk
    replied
    Re: 10G40 MLTL, Transducer Labs N26Cx-A/ Pellegrene waveguide

    Originally posted by Navy Guy View Post
    I would look at the area between 600-1000 hz and try to get that up a little higher. It looks like it is a bit lower than the upper midrange, which I would think could cause what you are hearing.
    it is not the dip that needs addressed, it is the peak that is right before it in the 500-550 range. level that a little and it will make a huge difference.

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