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Low-cost DIY practice/coffeehouse tweeterless 110 [long]

#241
Triad said:
Could this cab be made any "better" building a bigger cab?
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There is no BEST. It's really designer philosophy and intended use that drives any size and tuning choices. Myself, I think the size is fine, I'd probably tune just a tad lower. Beyond that, I consider the driver can only do what it can do. If I want something else I have to look at other drivers.
 
#242
Triad said:
I understand that Duke made this project for every player... but if you wanted to take the best out from the Deltalite what tuning and cab dimensions would you use?
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The Deltalite II 2510 is the recommended driver in a BFM Jack 10, and that can be built with a compression driver or a tweeter array.
 
#244
MX21: Did you find that the cab vibrated a lot? Any problems with the cab either vibrating off the amp stand or your amp vibrating off the top? I'm not having any issues...haven't played it enough to find out if I have any yet. LOL! But I'm just curious. Thanks for the pics; I've been wondering how I'm going to fit it on the stand (I've the same one) but have to take the stand out of the closet to find out.

GB: I'm sure the tabs can work fine in the orientation you use them in. I don't care for them all tilted like that...I'm a bit OCD when it comes to these things. So my cab is a few ounces heavier due to the washers...I can use the exercise. :)
 
#246
Oh, as far as names go, I get a kick out of ThunderMidget though I don't know if it's an accurate description...yet. MidbassMidget might be a more accurate name but has no "coolness factor" at all. What's the "NROD" in DIY-NROD stand for? We do have to name this thing. Maybe include "Duke" or "Lejune" or "DL" in the name? Maybe it's Papa should name it. Duke, what say you?
 
#249
mikeddd said:
MX21: Did you find that the cab vibrated a lot? Any problems with the cab either vibrating off the amp stand or your amp vibrating off the top? I'm not having any issues...haven't played it enough to find out if I have any yet. LOL! But I'm just curious. Thanks for the pics; I've been wondering how I'm going to fit it on the stand (I've the same one) but have to take the stand out of the closet to find out.

GB: I'm sure the tabs can work fine in the orientation you use them in. I don't care for them all tilted like that...I'm a bit OCD when it comes to these things. So my cab is a few ounces heavier due to the washers...I can use the exercise. :)
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No, no vibration issues. In fact, I set a pick on top if the amp and it was still there after a couple songs.

I do have a modification to the amp stand: I put adhesive Velcro (fuzzy side) on the bars where the amp sits. Mainly to protect the surface of hardsided cabs, but it may also keep the cab from sliding around.
 
#250
mikeddd said:
Oh, as far as names go, I get a kick out of ThunderMidget though I don't know if it's an accurate description...yet. MidbassMidget might be a more accurate name but has no "coolness factor" at all. What's the "NROD" in DIY-NROD stand for? We do have to name this thing. Maybe include "Duke" or "Lejune" or "DL" in the name? Maybe it's Papa should name it. Duke, what say you?
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NROD = Nano Rig Of Doom. There's another thread here on TB about tiny amp setups like this.
 
#251
Cool. Thanks for the tip on the Velcro. My stand is stock; I may mod mine like yours. I'm very happy to hear that you're impressed with your "Watchmacallit Cab." It's a good sign when people have the same opinions on a DIY piece of gear. Though two people can hardly be called "a good sized group" it's a start and a good one at that.
 
#254
Sorry I haven't been around much the past couple of days. Been busy... but looks like the project now has a life of its own. Ya'll are finding and solving the problems and coming up with the little tweaks and discovering what works best, and that's wonderful!

Agree with greenboy's assessment of filtering vs no filtering.

The Deltalite 2510 is a different beast, probably a better candidate for a two-way than for a tweeterless. It definitely wants a bigger box imo. In my experience despite their sometimes nasty-looking response curves, the Eminence bass guitar speakers are mostly "voiced" pretty good for tweeterless bass - typically better than their counterparts over on the "pro audio" pages of their website.

In my experience no stand-off washers are needed with the stamped frame woofers; just let the plastic tab sit at an angle and don't gorilla-tighten it.

With non-flush-mounted cast frame woofers, I use a "foot" as a stand-off. Sometimes I have to trim it a bit, but this is what it looks like (one of my home audio cabs... which "defies the laws of physics" by cramming a 12" woofer onto the front of an 11" wide box):

Invalid Link Removed

As for a name, up to you guys. I'm a little bit hesitant about "ThunderMidget" (cool though it is), as in my mind anyway the Thunderchild concept includes a big horn and a fairly low crossover and this little guy is very different. But if the people want it, I'm not gonna pull a Mubarak and resist. Also, at this point it's no longer Duke's cab... it's yours. You guys are doing the R&D on it now, figuring out how to use the cab, what it can and cannot do... my nomination would be "TB110".
 
#258
DukeLeJeune said:
Sorry I haven't been around much the past couple of days. Been busy... but looks like the project now has a life of its own. Ya'll are finding and solving the problems and coming up with the little tweaks and discovering what works best, and that's wonderful!

Agree with greenboy's assessment of filtering vs no filtering.

The Deltalite 2510 is a different beast, probably a better candidate for a two-way than for a tweeterless. It definitely wants a bigger box imo. In my experience despite their sometimes nasty-looking response curves, the Eminence bass guitar speakers are mostly "voiced" pretty good for tweeterless bass - typically better than their counterparts over on the "pro audio" pages of their website.

In my experience no stand-off washers are needed with the stamped frame woofers; just let the plastic tab sit at an angle and don't gorilla-tighten it.

With non-flush-mounted cast frame woofers, I use a "foot" as a stand-off. Sometimes I have to trim it a bit, but this is what it looks like (one of my home audio cabs... which "defies the laws of physics" by cramming a 12" woofer onto the front of an 11" wide box):

Invalid Link Removed

As for a name, up to you guys. I'm a little bit hesitant about "ThunderMidget" (cool though it is), as in my mind anyway the Thunderchild concept includes a big horn and a fairly low crossover and this little guy is very different. But if the people want it, I'm not gonna pull a Mubarak and resist. Also, at this point it's no longer Duke's cab... it's yours. You guys are doing the R&D on it now, figuring out how to use the cab, what it can and cannot do... my nomination would be "TB110".
Click to expand...
Duke
Whats going on there, it looks like the speaker, horn are mounted to a door, is that a stereo cab?
 
#260
Stupid question time:

Because the thermal rating on these is 150 watts (which means that the actual continuous is probably 50 watts, right), I thought I might try this and pair a couple of them with the MB200 or the Carvin Micro, which put out 200 watts. So I was wondering could I reduce the risk of blowing these by wiring them to run in series rather than parallel? Wouldn't this turn the rating from 4 ohms for a pair to 16 ohms, and reduce the wattage of these amps to 100 or so watts?
 

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