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

[Chris Roemer]

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

Chris,

Could you suggest slot port dimensions for the .3 cu ft box?

Why, according to my calculator, a 0.40" high slot, the internal width of the cab (4-3/8") that was 7" long (deep) should be equivalent to the 1.5"id x 7" cardboard tube I used. A slot that thin might chuff a lot though, even worse to put it on the front.

A better bet though, would be to model it with WinISD from www.linearteam.org

Chris

[honfatboy]

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

Chris,

Could you suggest slot port dimensions for the .3 cu ft box?

[PWR RYD]

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

Just a quick post to bump the "Replies" number to a less evil number

[brianbunge]

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

Well, you wouldn't hurt anything using the parts you got. The resistor on the L-pad would make the tweeter very slightly louder. You could always parallel the 2.2n with a 22n later (or a 25n or even a 20n) to get a final 2.0 ohms.

The 5.1uF cap would roll the tweeter off slightly higher. You could parallel it with a 0.5uF later on.

I may have some small caps that I ordered from Madisound years ago. Hopefully that will work to get the right value. I can't remember if I brought the stash home with me or left them at my dad's where the speaker cabinets are. I'll take a look in the next few days. I might even have some resistors laying around that will work.

[lostboy77]

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

Chris, on the mt version, will this port be okay:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=260-388

The Overnight mtm's have 2 of them. Can 2 be used fro your mt, or should I have the CNC company cut a different rear panel?

By my UniBoxing, two of those would require each to be over 13in long. I don't think that is going to work.

I like two of these . . .

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=260-402

. . . tape them end to end to get a 1.5in by 8in flared on both ends. This of course would require a different back.

[Erich H]

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

Chris, on the mt version, will this port be okay:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=260-388

The Overnight mtm's have 2 of them. Can 2 be used fro your mt, or should I have the CNC company cut a different rear panel?

[Chris Roemer]

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

Yeah, it was my mistake. I double-checked the shipping invoice.

I think there's still a place in Atlanta that sells speaker and crossover parts. I'll see if they are still around.

Well, you wouldn't hurt anything using the parts you got. The resistor on the L-pad would make the tweeter very slightly louder. You could always parallel the 2.2n with a 22n later (or a 25n or even a 20n) to get a final 2.0 ohms.

The 5.1uF cap would roll the tweeter off slightly higher. You could parallel it with a 0.5uF later on.

[brianbunge]

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

Yeah, it was my mistake. I double-checked the shipping invoice.

I think there's still a place in Atlanta that sells speaker and crossover parts. I'll see if they are still around.

[Herman Trivilino]

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

Make sure it was your mistake, not theirs. Recently they've been doing that kind of thing.

Also, you may be able to find caps at a local electronics store. Save you the shipping costs and the time.

[brianbunge]

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

Well, I was planning to start assembling the crossovers for the ntn's and realized I somehow ordered some wrong parts!!! I have 5.1uF caps instead of 5.6uF caps and also 2.2 ohm resistors instead of 2 ohm resistors!

Oh well, I guess I gotta order some new parts...

[tomzarbo]

Re: SICK - SICK - SICK . . .

This looks a little better I think...



Chris, I hope you don't mind me visualizing with your design a bit. It must be a little like someone drawing a mustache on your child's picture!

TomZ

[tomzarbo]

Re: SICK - SICK - SICK . . .

Yup.

SOME day I'll draw up a plan for the ntn, maybe, but I think I'll make the height 24" to help fit the cuts better on a "handi-panel".

There are almost as many variations on the ntn cab as people who've built them. A tall floor-stander (getting the ND20 up to at least 30") seems to be quite popular.

Chris

I drew this rough cut sheet up a few minutes ago.
It uses a 4x8 sheet of 3/4 material. It's rough, so take with grain of salt
Good thing about MDF though is at least in my neck of the woods, it is a little oversized which helps.



I added a stand to get it up the suggested 12" or so since there was the scrap available.

Hopefully I got the dimensions close to correct. Actually, after looking at it a bit, I think the stand may look a little better if it were reversed front to back.

BTW, I'm really enjoying my Nano Neo's, they do an amazing job!

TomZ

[Chris Roemer]

Re: SICK - SICK - SICK . . .

Are the box dimensions 28x6x9.5 outside dimensions with 3/4" stock?

TomZ

Yup.

SOME day I'll draw up a plan for the ntn, maybe, but I think I'll make the height 24" to help fit the cuts better on a "handi-panel".

There are almost as many variations on the ntn cab as people who've built them. A tall floor-stander (getting the ND20 up to at least 30") seems to be quite popular.

Chris

[tomzarbo]

Re: SICK - SICK - SICK . . .

My cabinet choice: 28"h x 6"w x 9.5"d. 0.55 cf
A 2"d x 7" long rear vent centered 10" up from the bottom tunes this box to 39 Hz yielding an F3 of 38. I'd mount the upper woofer's center 4" down from the box top. This puts the tweeter at about 21", so theese should sound best on about 12" high stands.

Off you go.

Chris

Are the box dimensions 28x6x9.5 outside dimensions with 3/4" stock?

TomZ

[Soundslike]

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

Very appropriate in a physics classroom,I'd say. I'll bet you refer to the components now and then...