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New hybrid build - the Tikki Lau D8

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  • takitaj
    replied
    Re: New hybrid build - the Tikki Lau D8

    Keith, sorry I missed your last post. I did all kinds of measurements but it's all in-box. They would only be good if you were doing a similar box size/shape. If you're still interested let me know. PM me your address and I can email you what I have. (there's a lot!)

    TJ

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  • kenny_k
    replied
    Re: New hybrid build - the Tikki Lau D8

    Thread reset.

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  • keith_correa
    replied
    Re: New hybrid build - the Tikki Lau D8

    Hi TJ:

    Thanks for responding. A pity those GREAT cabs cannot be repurposed. Did you measure the TS parameters of the DC200's or did you use manufacturer supplied parameters? If you measured them can you please post the numbers here?
    Also, did you measure the FR & IMP of the DC200's? If yes, and if you have them, can you please post the frd & zma files?

    -\keith

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  • takitaj
    replied
    Re: New hybrid build - the Tikki Lau D8

    Here's the latest one I could find. Ignore the 150Hz range, my room is responsible and I didn't do any splicing or anything.

    Click image for larger version

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    TJ

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  • takitaj
    replied
    Re: New hybrid build - the Tikki Lau D8

    Hi Keith, no that version went by the wayside when I was unable to open the trial software anymore. I've been meaning to update this thread but time has been short these days. As I explained in post #22 I had to re-do it in PCD, and that one is the one I was using when I made the measurements and is the one in the pictures. I'll see if I can dig it up. They did sound pretty sweet. Those classic 8's can really light up the bottom end and those TB W5-704D's work awesome as mids. Very easy to cross just about anywhere all the way up to 4-5K. Surprisingly not used very often. The SB29 tweeters took a little toying with to get right but it was worth the extra work. They are great tweeters too. My only gripe was with the woofer's frames. Over tighten the screws and they will pull through and rattle (hence the bump in the distortion plot). I wish PE would update the frame and keep everything else the same. I guess it's a cost thing but I'd pay a few more bucks for it!

    I have since upgraded all the drivers to 2xRS225-4's (in series), Scanspeak 15M's (4624G Discovery) with NeoX 2.0 ribbons and of course a new xover. Unfortunately the cabs ended up being just a little too small for the RS woofers so I've been working on a new cab design here and there and is why I never put it up here. Nothing concrete yet but it will be something fairly exotic on the CNC. Getting close!

    I kinda miss the original's lower end response (classic 8's). The Scan mid and ribbon tweeter are a killer combo but something is missing around the range of a snare drum but I haven't quite figured it out yet. Just too many other projects. It measures great but it's one of those things where the way it sounds doesn't correspond to what's measured. The new design might end up being a 4 way. I have a pair of Seas W18E-001's I may add in there to cover the low midrange and maybe some side mounted woofers, waveguide ribbons, lol. I dunno, still not sure yet but I will do a build thread when the time comes.

    Sorry I got rambling on here. I'll see if I can find the cross over and post it.

    TJ

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  • keith_correa
    replied
    Re: New hybrid build - the Tikki Lau D8

    Is the crossover in Post 19 the latest? If not, can I request you to please post the latest?

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  • ROTECH
    replied
    Re: New hybrid build - the Tikki Lau D8

    They only look 1970's because your wife as with many many others is a product of modern marketing and the notion that function must always follow form. I for one would not be building speakers if I wanted function to take a backseat. She must be used to going into Kohls or TJMaxx and seeing all of those child sized iPOD docking station with the 2''x2'' speakers that promise room shaking bass.

    Rock on with the big speakers!!!!!

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  • takitaj
    replied
    Re: New hybrid build - the Tikki Lau D8

    I was doing some measurements today and trying figure out what was causing the dip in the lower frequency range when it finally dawned on me what it was. I remembered that had changed the woofer crossover to a third order to improve the impedance, from a second order. I never changed the midrange and tweeter polarity to account for the 180deg phase change! :eek: Once I switched the polarity everything fell into place. Really smoothed everything out. :D

    I've been waiting to post final measurements until I got that figured out so here they are. I pulled the speaker out from the wall about 2 feet, set the amp for 2.8v, 0-0 on the tone controls, the mic 1m away and on the tweeter axis...

    1/12th smoothing and 1ms blended gating applied. Check out the phase curve!


    1/12 smoothing and no gating:


    1/12th smoothing on the distortion plot. Note: the bumps at about 50 and 190Hz are a buzzing from the woofer on the mounting screw. I tightened it too much and it pulled through the hole. I'll have to put some washers in there. Otherwise it's silent.


    That about wraps it up for now. After the Holiday's I'll put a nice finish on everything and post up the final pics.

    I'm also going to be building a center channel using 2 of the PE 6.5" buyout subs, a TB W4-1320SJF fullrange for the mid and TB 25-302SH tweeter. I'll post the build here when the time comes.

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  • takitaj
    replied
    Re: New hybrid build - the Tikki Lau D8

    Thanks guys, yes pretty proud! :D:D The best speakers I've ever built for sure.

    I finally figured out how to modify pictures so they fit the criteria and keep some of the picture quality. I have more to come once I get them sorted out but here's a look at the FR curve of both speakers running at about 1w from my listening position of 15ft (4.5 meters for those metric folks), about 15 deg off axis and 4db each of bass and trebble added with the tone controls (1/3rd octave smoothing applied). It sounds really nice as you can imagine...


    Here is the same measurement but with tone controlls flat (0,0)


    At a distance the dip at around 150Hz seems to disappear. I'm starting to think it has something to do with the woofer spacing causing some cancellation.

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  • 6thplanet
    replied
    Re: New hybrid build - the Tikki Lau D8

    +2, kinda 70's ish (prolly the black n' wood), but whatever...they look great!!

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  • isaeagle4031
    replied
    Re: New hybrid build - the Tikki Lau D8

    Very nice!! You should be plenty proud of those!

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  • arlis_1957@yahoo.com
    replied
    Re: New hybrid build - the Tikki Lau D8

    very nice work. beautiful.

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  • takitaj
    replied
    Re: New hybrid build - the Tikki Lau D8

    Thanks man! They are going to have a similar (best I can pull off ;) ) finish with a semi gloss polyurethane. My wife says they look like 70's speakers, I dunno, do they?

    I'm going to use automotive spot putty on all the edges and cracks of the MDF, then a few coats of flat black, some sanding then spray on a lot of light coats of semi gloss poly on everything with some #000 steel wool before the last coat or 2. Usually comes out pretty nice. I hate how long poly takes to "actually" dry hard but it's a nice tough finish. This is why I'm waiting to plug the screw holes, so I can remove the wood, but my hands are tired. It's been over a month working on these just about every day.

    I'm at the point I can actually listen to them plus I have another paying project to do on the CNC by New Years day so I'm going to take a break from them until after the holidays.

    Leave a comment:


  • ROTECH
    replied
    Re: New hybrid build - the Tikki Lau D8

    WICKED NICE. I really like how stout they look. I think if the black was a piano finish they would rival many expensive commercial offerings.

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  • takitaj
    replied
    Re: New hybrid build - the Tikki Lau D8

    Some final pics as promised. Graphs will have to wait 'til tomorrow.

    The holes in the side panels will be plugged later during the final puttying, sanding and polying. I'm going to take a break for the holidays.



    The crossovers


    In their final resting place

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