will the HiVi M3N's work in the Needles?

[Sibelius40]

Re: will the HiVi M3N's work in the Needles?

ok, some verdicts are in... and the winner is...

the caveats:
-- both of my enclosures were clamped shut, and i can't guarantee they were perfectly sealed. but i did tape over the edges and tried a couple different clamping methods (without any noticeable differences in sound) and the M3N was still better.
-- my port is a 4"x1" slot port 2.1" long. these were already built, so i can't evaluate the 1.6" port from the model right now. but i'm already impressed with the upgrade to the M3N, so i can't imagine it'll work out worse than the default cab with a B3N.
-- i didn't have the exact dragon foals components. my 1mH was a p-core, and the 5.6 uF was closer to 5.79 uF. i tried to unwind the inductor from .10 mH to .095 to compensate.

obviously, there is not limitless bass, but it's impressive for a 3" driver. "in your eyes" from peter gabriel seemed like one of the better songs to highlight the better points of this design.

anyhow, hope that helps, nik. sorry for the delays. now i guess it's time to finish those rs150 TL's...

So you used Wolf's contour filter for this test of the M3N's, not Zaph's? Or both?

[Sibelius40]

Re: Ka-Ching!

Thank you for your results and opinion! I like the M3N more than the B3N/S, and always have. Needs more taming, but just plain sounds better!

So- Who's building some 'Dragonflies'?? :D
Thanks, Patrick!
Wolf

I might...I have a pair of M3N's that are not being used right now. After looking at a finished pair of Needles, however, they reminded me a lot of a skyscraper in Chicago near my employer's office tower. I was going to call these Les Tours .

One other question, is there a significant enough difference in tuning or output between the slot port on these (using the 1.6" design) versus the round port on the Dragon Foals that might necessitate a modification of the contour filter? Or is the filter mainly designed to smooth out the upper freq range?

[Wolf]

Re: Ka-Ching!

The boost in his response and my box model are very similar, and should not be an issue to make a difference. Also- the contour I used does not include BSC, it's for the resonances only, as the tuning took care of BSC. The notches smooth out the hump in the midrange and the material resonance up high.



Patrick used the DF filter on his experiment, so just use the DF filter with the adjusted port tuning in the Needle boxes.

I'd like to hear these someday!
Later,
Wolf

[Sibelius40]

Re: Ka-Ching!

The boost in his response and my box model are very similar, and should not be an issue to make a difference. Also- the contour I used does not include BSC, it's for the resonances only, as the tuning took care of BSC. The notches smooth out the hump in the midrange and the material resonance up high.



Patrick used the DF filter on his experiment, so just use the DF filter with the adjusted port tuning in the Needle boxes.

I'd like to hear these someday!
Later,
Wolf

Wolf - that contour certainly does a good job at taming things down. I can't see because of the "Filter" button, but what is the upper-end frequency response on your sceenshot? Do these go up to 20khz?

Because of my work travel schedule for the next month, a quick build is unlikely. Perhaps in a few weeks I will have some time - if nothing else, it will give me time to think about the cabinet exteriors!

Scott

[PWR RYD]

Re: will the HiVi M3N's work in the Needles?

It looks like all of those plot lines end at 20kHz.

[Wolf]

Re: Ka-Ching!

Yeah- power-rider is right. The plots stop at 20kHz, which means the FR is about 3-4dB down at 20kHz but only from about 18kHz. It's fairly extended.

That filter really does do a fine job.

I'm just tickled Patrick took this on, and feel it might be a very viable little project.

Keep us posted on your progress! Whenever you get to it....

Later,
Wolf

[nikbrewer]

Re: will the HiVi M3N's work in the Needles?

well, i finally got around to building 1 box for my needles.

I ended up makinf the slot port 2" long, so we will see how that goes

1 question, in this inclosure, do you add stuffing, and if so, where?

I should have the cross over together soon, so i can report results as soon as i know about the stuffing issue

[Sibelius40]

Re: will the HiVi M3N's work in the Needles?

I believe the stuffing is added in the line all the way to the bend, where it is thinned out in the turn. I thought there was a pic of this somewhere on this thread - if not, I can probably find one.

[patrickm]

Re: will the HiVi M3N's work in the Needles?

stuffing is against the front baffle, dense at the bottom and thins out slightly as you go up. if you use little dowels, you can try taking it around the turn. i think i ended mine at the top of the divider.

[nikbrewer]

Re: will the HiVi M3N's work in the Needles?

cool, i stuffed it up flushwith the bottom of the divider. I did not do it before construction, so i kinda just shoved it down with a stick, but i think it worked.

One is all done and i am listening to it and it sounds very nice.

Good job on that filter wolf. I did a big terminal that uses a 3" hole, so i fed the crossover in that way and screwed it to the divider.

[Wolf]

Re: will the HiVi M3N's work in the Needles?

Thank you! So- you diggin' the results?
Later,
Wolf

[nikbrewer]

Re: will the HiVi M3N's work in the Needles?

i am very impressed so far. I hope to finish the ther one tonight or tomorrow.

I am amazed how good the high end sounds w/o a tweeter, and a good amount of bass comes out the port. I just have to figure out what to do with them, as I now have about 4 pairs of speakers w/o a home (lol)

[Wolf]

Re: will the HiVi M3N's work in the Needles?

So- you gonna post pics of your Dragonflies?
Glad you like 'em!
Wolf

[nikbrewer]

Re: will the HiVi M3N's work in the Needles?

they wont be pretty, but ill post up some pics tomorrow

[Wolf]

Re: will the HiVi M3N's work in the Needles?

Koo-Beanz, Nikolai!
Wolf