Yes i agree Profiguy. That's why I'm interested in trying a 4 way with two ne149's between the sb34 and d7608.
I'm halfway through making some test cabnets for this.
I'm impressed how good this current compromised 3 way sounds.
I'm halfway through making some test cabnets for this.
I'm impressed how good this current compromised 3 way sounds.
I use NE123W08 and NE225W08. I really have no complaints about the build quality or the sound. The only thing I fear is that the NEO magnet will not corrode over time. I hope they are well galvanized.
Here's an impedance measurement of both domes in an enclosure that Profiguy designed, I think it's around .35L? it's a perfect fit onto the magnet!
The above is fully stuffed(not tight) with rockwool and that's how I'm currently using them. The one below is one dome either full stuffed or half stuffed. Not sure what option would be better really. I could test more options.
Blue is half stuffed.
The above is fully stuffed(not tight) with rockwool and that's how I'm currently using them. The one below is one dome either full stuffed or half stuffed. Not sure what option would be better really. I could test more options.
Blue is half stuffed.
Here's something you could try. Add padding resistors to the tweeter. Off the top of my head, I'd suggest 10 ohms in parallel with the tweeter, and 2 ohms in series before the 10 ohm. This will smooth out the impedance. It helps with some tweeters and passive x-overs. I'm speculating that it might work in an active as well.
4 way using two NE149W for midbass is weird for me unless you are building MTM, never seen any speaker design like this.
3"-4" midrange + 6.5"-8" midbass is my reference, so NE180W will be good choice for your build.
3"-4" midrange + 6.5"-8" midbass is my reference, so NE180W will be good choice for your build.
I agree 2 Ne149w's seems a little odd. My reasoning is i already have 4 of them and also they will help keep the tweeter height down vs one larger midbass. Also 2 of them should beat one ne180w.
I'll do it as a test first.
I'm currently still liking this as a 3 way with the sb34nrxl75-8 crossed at 400-500hz. It does very well.
I'll do it as a test first.
I'm currently still liking this as a 3 way with the sb34nrxl75-8 crossed at 400-500hz. It does very well.
It is trade off. Only one if you don't need PA spll permits to have a good soundstage. According the filter slope you can with one driver handles 200 to 300 hz high pass and a low pass up to 2000 to 3000 Hz w/o too much problems according the complexity of the filter (some notch migth be mandatory (see Kurt Campbell work with this driver)
a 5" cone allows a good soundstage in an average livingroom and a wider passband than a 3' dome.
Now if more spl or less THD or if a different radiating patern is wanted -, you can use MTM or MMT in // or in 0.5 way filtering.
I personally would choose more MMT with simply the two 8 ohms // : less distorsion and lowered high pass. There is something good sounding with loudsppeakers having 150 hz circa high pass and >= 2000 hz low pass for the mids.
I personnaly have a good resolving loudspeaker with aluminium mid and tweeter covering acousticaly >100 hz bandwifth up to 20 Khz.
But agging, I 'd like to make today the opposit and comes back to papeer likes material for the mid (staying hard dome in the trebles though) : a little less details but more forgiving as most of the reccordings are mixed with such paper material at the end and many 16/44 materials are not always good.
So a 3 ways with 4 drivers, while the 4 ways could allow you subwoofer distributions.
My 2 cents, MMMV with time as high resolution speaker with hard cones/domes can be smooth to the ears too, but you need some EQ for the break ups and/or has a smooth good resolving DAC. I had to design a part of my ownn DAC analog stage to allow a complete vynil sound with the added dynamic and clearness of digital... Hifi is full of trade offs !
The little WMTM Barefoot (with 2 NE19W) is said no slouch with DSP and 3.5 waysfiltering (the MTM arrengment is physical, not the filter) or WMMT Joachim Gerhard last designs and we all know how good he can design loudspeakers :
https://suesskindaudio.de/en/ara
He is also making a loudspeaker with mid domes in a MMT arrengment :
https://suesskindaudio.de/en/kronos-2
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