15" 2-way Ideas

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BobtheBuilderMLG

BobtheBuilderMLG

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Joined 2015
What about the FaitalPRO 18HP1010 its not that much more expensive, heres a link to it. FaitalPRO 18HP1010 18" Professional Subwoofer 8 Ohm

Here's a way cheaper 18" Dayton Audio PA465S-8 the link is
Dayton Audio PA465S-8 18" Pro Subwoofer 4" VC 8 Ohm

Would the Dayton be that much worse in SQ? Sensitivity is down quiet a bit though.

I'm back to the 18" idea I need to find a 10" midrange then and it will break my budget but that just means Ill by parts not all at once and build as I go.

That 18" fatal though is my favorite so far.
 
H

hazard500

Member
Joined 2012
BobtheBuilderMLG said:
So my plan is to make a 15" 2-way very dynamic massive speakers. Im new to building so would love any feedback.

Driver I'm think of would be a Beyma SM115/N 15" woofer
Beyma SM115/N 15 inch low frequency loudspeaker 400W | Loudspeaker freaks

and a Eminence N314T-8 CD
Eminence N314T-8 1.4" Neo Compression Driver 8 Ohm 4-Bolt

with a Eminence H14EA horn
Eminence H14EA 1.4" Cast Aluminum Exponential Horn 60x40 4-Bolt

For the crossover I would add an L-Pad 13 db or so on the CD and using a 3rd order crossover point of 1000 hz. the reason why I chose 1000 hz is because distortion on the CD seems to rise very fast see attached image and at 1000 hz I figured the woofer wouldn't have a real issue with beaming. I also choice a 2-way so that there would be less error in the crossover.

For the enclosure it would be around 6 cubic feet vented and hope to get at-least around 40hz before my 3db drop off. I also want to design the enclosure around the vintage JBL monitor look.

A few questions I have is is am I being realistic with my expectations of these drivers? I also have a mini dsp I use for my dual 21" subs I could use for this project at least for the woofers don't like the idea of using a dsp on the tweeters. I'm not keeping the subs so why not.

Here's a link the an artical on the CD Test Bench: Eminence N314T-8 with H14EA Horn and N320T-8 with H2EA Horn
Click to expand...
Bob, I started a similar thread a few days ago in the full range thread.

Like you I want to build a 2 way with 15" subs. I am going open baffle as I have been using magneplanars and ribbons for 25 years and I can't listen to boxes anymore (box resonances stick out like a sore thumb since I am so unaccustomed to them).

I have been inspired by the layout of the PureAudio Project speakers. Damn easy to make as a diy project.

New ! PAP-Horn1 Trio15 Speakers – PureAudioProject

For woofers, I was considering buying a set of OEM Eminence drivers that PureAudio sells but shipping to Australia makes them expensive. I have found that I can buy FaitalPro 15PR400 from local distributor for a significantly lower price, and as you can see in this thread, many people consider these better then Eminence drivers so its a win win for me. So they are on my shortlist. Beyma woofers are good I am sure but there is no Australian distributor and they are too expensive to import.

I have considered CD. Disadvantage I see is that crossover is going to be around 1k and I prefer to limit the woofer somewhat lower. So I am looking at a full range driver (6 to 8 inch) for the mid/tweeter driver. Still looking at lots of alternatives for this, have you thought about FR drivers or are you committed to CDs?

I already bi-amp my magneplanars panels, with a passive line level crossover at 660Herts to my diy ribbons. So I will keep this for the new system, good thing about my crossover is that I can change it in minutes with a few cheap caps. No need for big inductors or large caps.

Will be interested to see how your design pans out.
 
BobtheBuilderMLG

BobtheBuilderMLG

Member
Joined 2015
Id like to go open baffle but I need low end. The music I listen to has a lot of low end bass.

Tbh I'm not to familiar with CDs, I have built 2 pairs of speakers and they both used Fountek ribbons. Although they sound fantastic I always though they struggled in dynamics same with the woofers and mid range. I figured this is the path to solving the issues. I have heard JBL titanium tweeters before and liked them a lot so I think ill be fine with a Titanium CD. I also like beryllium tweeters better but to expensive.

I do plan on crossing an 18 lower then 250 hz.
 
globalplayer

globalplayer

Member
Joined 2014
hazard500 said:
The Fane does seem to go out to 20k which is surprising for a big 12inch FR - but the off axis response looks terrible! How does it sound?
Click to expand...

Very good, pleasant smooth natural paper sound.
Also lots of detail and baffling highs for a 12 inch.

I use it with a "waveguide" and "phase-plug" to even out response and increase high freq dispersion.

xo 110-130hz.
 
H

hazard500

Member
Joined 2012
Fane 12" FR

globalplayer said:
Very good, pleasant smooth natural paper sound.
Also lots of detail and baffling highs for a 12 inch.

I use it with a "waveguide" and "phase-plug" to even out response and increase high freq dispersion.

xo 110-130hz.
Click to expand...
And of course there is no dealer in Australia :mad:

Did you cut out the dustcap and install waveguide yourself? How did you make the waveguide?

Regards
 
globalplayer

globalplayer

Member
Joined 2014
hazard500 said:
And of course there is no dealer in Australia :mad:

Did you cut out the dustcap and install waveguide yourself? How did you make the waveguide?

Regards
Click to expand...

Quick and dirty sketch.

i4jg9jlw.png



Doing it like this you will have a wide soundstage, good highs dispersion and won`t need any eq.

I couldn`t do anything to this beautiful sounding driver, so I tried using "external" methods.
 
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