on Sale - $55/pr (drivers & XO)

[XtremeRevolution]

Re: on Sale - $55/pr (drivers & XO)

Bump.

Can anyone answer the above question for me?

[mikejennens]

Re: on Sale - $55/pr (drivers & XO)

Bump.

Can anyone answer the above question for me?

I measured my TM version and it's about half that height, so I would guess that those dimensions are external. Chris isn't online at the moment, but he'll probably answer you soon.
Mike

[Drew_V]

Re: on Sale - $55/pr (drivers & XO)

Are the above dimensions internal or external with 3/4" board? I have lots of 3/4" MDF lying around from previous subwoofer box builds; would this be suitable?

Thanks.

Easy enough to figure out:

If it's 0.55 cu. ft. internal cabinet volume, then it must be external dimensions:

26.5 x 4.5 x 8 (internal dims using 3/4" MDF) = 954 cu. in. / 1728 = 0.55 cu. ft. internal cabinet volume

[Herman Trivilino]

Re: on Sale - $55/pr (drivers & XO)

Are the above dimensions internal or external with 3/4" board? I have lots of 3/4" MDF lying around from previous subwoofer box builds; would this be suitable?

Those are external dimensions using 3/4" material. MDF will work great.

[XtremeRevolution]

Re: on Sale - $55/pr (drivers & XO)

Those are external dimensions using 3/4" material. MDF will work great.

Alright, I'm going to spoil the surprise because I figured you guys could tell me if its a bad idea or if there's something I need to watch out for.

The cabinets will be primed, painted black and then engraved with a thin round dremel router bit on a dremel. My wife will be making the designs. After that, it will be lightly coated with a clear coat, perhaps even polyurethane, sanded with a fine grit to remove any imperfections, and then painted with a heavier clear coat to leave a piano black finish.

[fastbike1]

Re: on Sale - $55/pr (drivers & XO)

Have you ever done a piano black finish? I understand that you may be summarizing, but if not, a true piano black finish will take a lot more work than that. Especially if using mdf and expecting to sell commercially.

Alright, I'm going to spoil the surprise because I figured you guys could tell me if its a bad idea or if there's something I need to watch out for.

The cabinets will be primed, painted black and then engraved with a thin round dremel router bit on a dremel. My wife will be making the designs. After that, it will be lightly coated with a clear coat, perhaps even polyurethane, sanded with a fine grit to remove any imperfections, and then painted with a heavier clear coat to leave a piano black finish.

[Drew_V]

Re: on Sale - $55/pr (drivers & XO)

Just ordered all the parts for the Nano build. I decided to go ultra-cheap and went with the original 6-element crossover. I figure for a desktop PC application, it should be more than good enough. And to show just how cheap I'm going, I splurged for the 60-cent press-fit terminal cups for the cabinets.

I did want to make a few changes, however. First, I wanted to lower the height of the drivers so the tweeter was at ear level while seated at my computer. I figure that would take them down maybe 2 inches. Then, I was going to change the port to front-firing, so I'd have to drop that down as well. The terminal cup would then likely have to go above the port location on the rear of the cabinet. No big deal, but I figured I'd post it here to see if anyone sees any potential problems with this configuration.

Aside from that, I'm really looking forward to the sub-40Hz bass out of these little 4-inchers. Wish me luck!


EDIT: Added image of proposed driver and port mods. Moved the brace up above the woofer and made it wider. I think I'm going to just use Velcro and attach the Xover to the port tube itself.

Would anyone else be able to comment on my concept of moving the drivers and port in this manner?

[XtremeRevolution]

Re: on Sale - $55/pr (drivers & XO)

Have you ever done a piano black finish? I understand that you may be summarizing, but if not, a true piano black finish will take a lot more work than that. Especially if using mdf and expecting to sell commercially.

Never done it before, but I have read up on a lot of people who have done it on several forums and their processes and results. I'm not going to be selling these commercially, at least not now. The first set is for my father in law as a birthday present/congrats for fighting lung cancer present. The mini ND65 speakers I'm building will be built with a plan for more commercial sales, but I'm not sure if I'm going to make those piano black as it might be too much work.

[Chris Roemer]

Re: on Sale - $55/pr (drivers & XO)

Would anyone else be able to comment on my concept of moving the drivers and port in this manner?

You're OK.

[cwad8505]

Re: on Sale - $55/pr (drivers & XO)

Well.. got my parts in. Put me on the now very long list of folks to build these.. (8 element xo) will begin this weekend. I will attempt to get somewhat creative (for me, at least) on these in terms of stands and paint and post photos of the finished product.. wish me luck! :D ~ Chris

[JustinL42]

Re: on Sale - $55/pr (drivers & XO)

Cwad8505,
I was born in Evansville. Lived there til I was about 8 then moved away and never really got back there except for a couple of brief visits. Look forward to seeing the build photos.

JustinL42

[MLS]

Re: on Sale - $55/pr (drivers & XO)

I got mine up and running on a temporary basis last night. Everything works fine and they sound pretty good. Now it is time to take them apart and start the finishing process.

What do you guys think is the best method of dampening material installation. Should the bottom be fairly open and more dampening towards the top?

MLS

[reaper60]

Re: on Sale - $55/pr (drivers & XO)

I really apologize if this has been posted before, but I really can't afford to read through 13 pages of this post to find all this information! Anyways,...

I bought these 4" drivers on my own accord liking their specs and thinking about a satellite speaker design and a center channel design for my home theater. I actually have all the drivers in hand already prior to visiting this area and finding this thread! I guess great minds think alike! I did however choose to go a different route for my tweets as I decided the truncated Dayton DC28FST silk domes looked like a much nicer and heftier choice to me.

Now, I plan to build an MTM enclosure for my rear surrounds which will be on stands. My plan was to have them ported and tuned to 36-40 hz. to emphasize that low end, however they will probably be crossed over at 40 hz or higher anyways with application in mind.

This is my first ever full range speaker project and I am extremely excited about it, and I am in no rush and plan to read everything I can about this prior to construction. I have lots of woodworking materials, and am lucky enough to work for one of the largest tool companies in the world so I have access to practically anything I could need.

My questions at the moment though are: using an MTM design, how is that going to change the design of the cabinets as far as size, etc. ? I want to keep the cabinets smallish (perhaps I should stay sealed?), how is it going to effect the crossover design? And lastly, what can I expect for power handling? I have a 125 wpc emotiva amplifier and don't want to destroy these poor little guys after all this effort!

The drivers I am using are twin 4 ohm in the MTM surrounds, and I have (4) 8 ohm drivers for the center I am building. All will be wired for an 8-0hm final load, however 4 ohm is not out of the question as my amp will easily support that with 185 wpc.

Thanks for all the help guys!

P.S. I am currently building a project utilizing the Dayton SD-315A -88 12" woofer and (2) SW315 passives with 150W plate amp. I have it modeled to go down to 19hz at -10dB, 25hz at -3dB, and peak SPL at about 80-120 hz of 120dB! Not so shabby with 150 watts of power eh? I am documenting the whole process including lots of pictures and look forward to posting results here following. I'm still waiting for the back-ordered SW315 passives to arrive (due in tomorrow) Thanks again for the help guys!

Also, any literature you can recommend of websites with useful information on designing and building my own speakers / crossover networks I would greatly appreciate!!!

[lostboy77]

Re: on Sale - $55/pr (drivers & XO)

As much as you don't like the idea, I would STRONGLY recommend reading ALL 13 pages of this thread. There is a lot of great information here, all of it quite necessary when working with the ND105's. As for using the DC28FST, I think that you will find that it changes the XO design to the point of being a different build all together. I would recommend springing for the tweeters intended for this build. They are really not that expensive.

[ericJ]

Re: on Sale - $55/pr (drivers & XO)

Well.. got my parts in. Put me on the now very long list of folks to build these.. (8 element xo) will begin this weekend. I will attempt to get somewhat creative (for me, at least) on these in terms of stands and paint and post photos of the finished product.. wish me luck! :D ~ Chris

Ditto on the receipt of parts. My, aren't those some little drivers? My 4 yr old daughter really loved the small boxes the tweets came in.

I'm going with the original 6 element xover and probably won't get too creative on the box. You'll probably still have yours built before mine!