HiVi M6N in OB

[arc2v]

I searched on this driver and it comes up occasionally, but not much discussion.

http://www.partsexpress.com/pe/pshow...97-441&scqty=2

After reading the PE flyer and the featured DIY system, I became intrigued by the M6N.

They claim to have a pretty flat response up to 6k. I like the flatter cone shape for OB, because it is more piston-like, however the metal material might make for some nasty breakups.

Looking at its impedance curve, it has a minor hiccup at 400 Hz, but then appears pretty smooth to 3500 where it looks like the actual breakup begins.

FR is pretty flat up through 1k. I would be looking to cross them at either 1800 Hz to hand off to a Neo3PDR or push them up to 3kHz. This would be in an MTM open baffle arrangement.

I would plan on making the speaker a 3 way to augment the bass. I wouldn't expect these to reach much lower than 100 Hz and even that's optimistic.

Any thoughts here (on my plan or the drivers)?

It always stinks that you can plan plan plan, but you really need several drivers in hand to play around with. Of course, then you end up with a lot of unused drivers and an empty wallet

[NurEinTier]

Looks like a very good mid for a great price.

Pretty flat up to 3000 including @30 offaxis.
Not many 6.5" are comfortable @3000 though, distortion could be high @3000, impossible to tell without an independent test.

And 1800Hz for a Neo3PDR sounds a bit low.

I'm guessing you want to keep the crossover away from 300 to 3000?

Qts 0.49 very nice.
Xmax 3.5 very nice.
Shielded, nice bonus.
Very good looking, nice bonus.

Price is unbelievable.
A steal, howabout 82,- eoro in my part of the world>>>

http://www.hifisound.de/oxid/oxid.ph...ALU-MAGNESIUM/

If I was you I would grab 8, 4 mids per side (could give some comb-effect?), cross at 3000.

For that kind of money a good candidate for line array aswell, 8 or 12 drivers a side for a bargain price.

[arc2v]

The Neo3 has been demonstrated to work crossed that low in an open baffle. GR-Research does so on its OB5 and OB7 line and the Adire DDR dipole design did as well (MTM with 2 Extremis woofers).

So I'm not worried there. If I do cross it over that low, I'm going to use a 4th order L-R to really lock it down quickly and keep the bass out.

I ran some tests in Xlbaffle and the M6N does as well as the Dayton RS 8" in the same baffles (I already have 2 Daytons for testing). The Dayton extends slightly lower and can handle more power, but has a nasty breakup right at 1800Hz. I like that the M6N delays this a bit allowing for a higher crossover if need be.

Another thing I like is that I can play with the crossover frequency a lot to find what I like best, whereas with the Daytons I can't cross them any higher and definitely can't cross the neo3 any lower.

Right now I'm debating this in a 3 way WWMTM, or going with another 3 way WWMT with a Neo8 as the M.

In either case, the mid and tweet sections are going to be OB. Not sure about the bass yet.

I'm trying to stay completely passive and no EQ for now.

Thanks for the input. Sorry they are so expensive in your parts.

[arc2v]

Followup regarding the crossover:

Ideally I want a driver that can go from about 300Hz through 3k in OB and hand off to the Neo3, but that does not seem likely.

Plan B is the 1.8kHz crossover. Not ideal, but we work with what we got (or what's on sale )

[NurEinTier]

Someone is getting rich on those drivers in Europe that's for sure.
Shipping is too expensive otherwise I would grab all my drivers in the US.

Looking for something very similar to your project.
One, two or four 6.5 mids OB crossed at 3000 to a neo3 with 12db
That way I can play it LOUD if need be with little distortion.
And keep the crossover away from the 300-3000 range.
Not many 6.5" like to go that high so I might go for a 5.25" or even 4".

Does a neo3@1800 limit it's max output?

What I would really want is a planar as a mid between 300 and 4000. Sadly the neo8 can't go that low.

Made a cheapo test ob with 3" and 8" fullrangers.
I have no doubt I prefer OB to anything else, including bass.

Those hivi drivers look like a perfect mid for experimenting with the crossover ranges.
Let your ears decide if you prefer 1800, 2500 or 3000.

[arc2v]

I played around some with the passive crossover designer spreadsheet from FRD Consortium.

The following plots are 2 HiVi M6Ns MTM with a Neo3PDR.

FR and Z information taken with the IEC baffle were used, since my final baffle will be about that width (~12", flat or U)

Crossover is 1850Hz, 3rd order electrical, matching 4th order L-R acoustic.

Woofers are in series, crossover sections are in parallel

Zoebel circuit on the woofers and a notch filter on the Neo3 to tame a 11kHz peak.

Any ideas, criticisms, or other input?

Thanks,
A

[arc2v]

Impedance. This one looks weird, but I'm pretty sure my amp can handle it.

[arc2v]

Phase. Not sure what to make of this. At least it is steady.

Edit: sorry for posting multiple posts. If I could figure out how to put more pics on one post, I would.

[el`Ol]

Originally posted by NurEinTier
Someone is getting rich on those drivers in Europe that's for sure.
Shipping is too expensive otherwise I would grab all my drivers in the US.

Looking for something very similar to your project.
One, two or four 6.5 mids OB crossed at 3000 to a neo3 with 12db
That way I can play it LOUD if need be with little distortion.
And keep the crossover away from the 300-3000 range.
Not many 6.5" like to go that high so I might go for a 5.25" or even 4".

Does a neo3@1800 limit it's max output?

What I would really want is a planar as a mid between 300 and 4000. Sadly the neo8 can't go that low.

Made a cheapo test ob with 3" and 8" fullrangers.
I have no doubt I prefer OB to anything else, including bass.

Those hivi drivers look like a perfect mid for experimenting with the crossover ranges.
Let your ears decide if you prefer 1800, 2500 or 3000.

Hallo Tier!

This would be my choice for a cheapo OB driver combined with the Neo 3 here in Europe.
http://www.ciare.com/pdf/catalogo/CW170Z.pdf
Used as a dipole the Neo 3 can be crossed lower, but because of the lower sensitivity the low power handling becomes an issue, so I would cross it rather higher.

[NurEinTier]

ciare cw170z
qts 1.23
xmax 1.75mm
moving mass 8 gr
freq range easily over 3000
90db
very cheap

For a budget driver not bad at all but but even with such a low moving mass I don't think it would marry well with a neo3.
Don't think an OB mid needs that kind of qts.

My 6.5" candidates;

visaton WS 17 E 20,- euro
http://www.visaton.de/de/chassis_zub...n/ws17e_8.html

monocar SPW-165/8 22,- euro
http://www.monacor.de/en/produktseit...yp=full&spr=EN

Peerless SDS-164-THP 23,- euro
http://www.tymphany.com/datasheet/printview.php?id=20

visaton W 170 S 8 30,- euro
http://www.visaton.de/de/chassis_zub...n/w170s_8.html

mivoc wpp 180 35,- euro
http://www.lautsprechershop.de/hifi/...ifi/wpp180.htm

Monocar sph-170 45,- euro
http://www.monacor.de/int/de/produkt...pr=DE&typ=full

monocar SPH-176 45,- euro
http://www.monacor.de/int/de/produkt...pr=DE&typ=full

peerless HDS-164 nomex 55,- euro
http://www.tymphany.com/datasheet/printview.php?id=12

several tangbands e.g.
http://www.hzh-audio.com/?page_name=W6-658A

Not sure I can trust monocar, tangband, visaton specs.
Not sure 6.5" is the way to go, 3000hz is a lot for a mid-woofer especially off-axis.
5" can reach 3000hz off-axis much better,
http://www.tymphany.com/datasheet/printview.php?id=322
Offcourse the price is less surface area.



arc2v forgive me for stealing your post a bit.
As you can see that Hivi is a streal.
Nothing comes close overhere.
Damn those shipping costs.
Wish parts-express would come to europe.

Test data looks very good.
Crossover idea also looks good but I never designed one so what would I know.

Any idea what woofers you're going to use and in what way?
Closed, br, ob, horn, dipool?