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  • imakethings
    replied
    Originally posted by tomzarbo View Post
    No, I started from scratch for these basically. These use the 8 ohm version of the ND91...I still haven't finalized the crossover for these. Not that they sounded bad last year in Indiana, but I think I may try to revisit the crossover again to see if I can possibly simplify things a bit. I think I can get the tweeter crossover parts in the base, then just have the woofer crossover bits to attach to the rear baffle. It's been awhile since I've even listened to them, gotta get back to these soon. TomZ
    Thanks! I think these will make a good portable radio that would spend most its time in a bedroom.

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  • tomzarbo
    replied
    Originally posted by imakethings View Post
    Tom did you use the same crossover from the bantam TMs?
    No, I started from scratch for these basically. These use the 8 ohm version of the ND91...I still haven't finalized the crossover for these. Not that they sounded bad last year in Indiana, but I think I may try to revisit the crossover again to see if I can possibly simplify things a bit. I think I can get the tweeter crossover parts in the base, then just have the woofer crossover bits to attach to the rear baffle. It's been awhile since I've even listened to them, gotta get back to these soon.

    TomZ

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  • Wolf
    replied
    That's a definite 'no'. The doubled up drivers will have an impedance shift, and therefore at the very least change some of the values.
    Later,
    Wolf

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  • imakethings
    replied
    Tom did you use the same crossover from the bantam TMs?

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  • MLS
    replied
    They look great Tom!!! Nice work.

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  • Wolf
    replied
    I'd like to hear the Bantam TMs as well. (In fact- they could compete as well if you wished to.) I don't think you could pack them any more full without adding sand or concrete. 'Project density' is also something that increases when dealing with the itty-bitty-booger speaker builds.

    As to PRs, yes- you've used a lot of them! I've used my fair share as well, but I don't opt to use them over a port if the port gets the job done with the results I wanted. It's that price/performance thing. $2 piece of PVC vs $80 PR in some cases...

    Later,
    Wolf

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  • tomzarbo
    replied
    Thanks an awful lot, guys.

    I haven't had a chance to take any measurements yet, but I did hook the woofers up with a small coil to calm the midrange down a bit and gave a listen to check for a good bass alignment with the PR's. Check. Sounds pretty decent and even has a 'punchyness' to the sound if you stand right in front of them close enough. Funny to see two 5" PR's in action with just a duo of 3" drivers making them go. Passive Radiators make me happy. I think I'm a weird guy.

    I think I'm for sure going to bring the original "Bantams" to Indiana also... if for nothing else than to just let the guys feel how heavy they each are for their size.

    TomZ

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  • joeybutts
    replied
    I absolutely love how these are super clean yet have an exotic flair to them..... like a Lamborghini or koeniggsegg..... so much going on but beautifully constructed and finished.

    As always Tom, great execution...

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  • djg
    replied
    Those are really nice.

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  • Wolf
    replied
    Since the Denovo boxes are stocked, and it's a 'Design Team' build, they indeed have that option.

    I think both are pretty cool anyway,
    Wolf

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  • ronk
    replied
    Maybe, parts express can sell the Bantam MT kit. They have the Denova box, so all they need is to cut the holes into the Denova box and package all the drivers and crossover. There is no readymade box for the MTMs. The front and sides of the Bantam MTM are gorgeous.

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  • tomzarbo
    replied
    Thanks guys.

    RonK, My woodworking skills preclude me from building these MTM's also to be honest... if you only knew.

    Really, I wouldn't build a set of these exact speakers again if you pointed a gun to my head. WAaaaaaaaayyyy to hard. The minutia is mind boggling for me. I was trying for a certain 'look' but within the constrains of the rules for DIY Indiana coming up in a few weeks... most notably 'nothing larger than what would fit in a 12" cube,' and 'max interior volume of 3 liters.'

    After the dust settles I'll hopefully get a box plan together for these that doesn't require removable front/back with hidden fasteners, 2 cabinet gaskets, trimming driver gaskets... heck, trimming driver frames for that matter... All this was done to 'make it fit' and get just the look I wanted.

    It can be done mostly as nice, and much easier... and I'll get to that in a few months if they are fairly well accepted or if I think they deserve it sound quality wise....Lord willing. The "non DIY Indiana" version should also dig a bit deeper probably as well, but not by much.

    TomZ

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  • ronk
    replied
    Looks fantastic. It should sound fantastic. I might try making the original Bantams but my woodworking skills preclude me from trying to make the Bantams MTMs.

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  • Navy Guy
    replied
    Looks great, Tom!

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  • joe_bernardi43
    replied
    those look great! I wish i could make it to DIY Indiana.

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