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Multi-Way Conventional loudspeakers with crossovers

15" 2-way Ideas
15" 2-way Ideas
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Old 30th January 2018, 09:21 PM   #1
BobtheBuilderMLG is offline BobtheBuilderMLG  United States
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Default 15" 2-way Ideas

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
http://loudspeakerfreaks.com/Product...roduct_ID=3622

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
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Old 30th January 2018, 09:22 PM   #2
BobtheBuilderMLG is offline BobtheBuilderMLG  United States
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What I want them to look like in a 2-way obviously. Those are JBL 4345
Attached Images
File Type: jpeg images.jpeg (8.7 KB, 865 views)
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Old 30th January 2018, 09:39 PM   #3
stickinsect is online now stickinsect  United Kingdom
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If you want a massive two way google the Blue Thunder loudspeaker.I don't think the wife would like a pair of those in the living room!
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Old 30th January 2018, 09:46 PM   #4
BobtheBuilderMLG is offline BobtheBuilderMLG  United States
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A beryllium CD! If only I could afford that. That thing looks awesome.
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Old 30th January 2018, 11:03 PM   #5
LineSource is offline LineSource  United States
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The Faital Pro HF146 compression driver(1.4") and LTH142 Tractrix horn are worth your review, as is the Faital 15PR400 woofer. You will find a few threads with crossovers and positive reviews.

----$660--------Focal T-M (1.4" CD + 15")
FaitalPro 15PR400 $260
FaitalPro HF146 1.4" Neo Compression Driver Plastic dome $250
FaitalPRO LTH142 1.4" 60 x 50 Elliptical Tractrix Horn 4-Bolt. $60
custom BW3 - LR4 crossover ~ $100
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File Type: jpg M19 style & Conscala guts.jpg (204.0 KB, 834 views)
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Old 30th January 2018, 11:15 PM   #6
globalplayer is offline globalplayer  Germany
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+1 for Faital Pro 15PR400.
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Old 30th January 2018, 11:26 PM   #7
BobtheBuilderMLG is offline BobtheBuilderMLG  United States
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Never heard a Faital Pro tbh. I always have preferred titanium though over plastic although that frequency looks much better may have to expand my horizons.
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Old 30th January 2018, 11:28 PM   #8
BobtheBuilderMLG is offline BobtheBuilderMLG  United States
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Quote:
Originally Posted by LineSource View Post
The Faital Pro HF146 compression driver(1.4") and LTH142 Tractrix horn are worth your review, as is the Faital 15PR400 woofer. You will find a few threads with crossovers and positive reviews.

----$660--------Focal T-M (1.4" CD + 15")
FaitalPro 15PR400 $260
FaitalPro HF146 1.4" Neo Compression Driver Plastic dome $250
FaitalPRO LTH142 1.4" 60 x 50 Elliptical Tractrix Horn 4-Bolt. $60
custom BW3 - LR4 crossover ~ $100
How low does that woofer go and what sensitivity? That box looks small. Never mind the picture didnt load all the way I see it.
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Last edited by BobtheBuilderMLG; 30th January 2018 at 11:38 PM.
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Old 30th January 2018, 11:39 PM   #9
LineSource is offline LineSource  United States
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You could build a 3-way (1" CD + 12" midbass + 18" woofer) for the JBL 4345 cabinet using $400 in well reviewed low cost drivers, and ~$160 crossover.

1" DFM-2535R-08 on PRV-WG35-25 = $55
12 Eminence Delta Pro 12A $130
18 Peavey LoRider18 $215
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Old 30th January 2018, 11:48 PM   #10
BobtheBuilderMLG is offline BobtheBuilderMLG  United States
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I thought about a 3-way but with a 15" 8" then the CD so I could match the speaker more. I think thats the sizes they used but it just got real expensive for what I wanted. I am also a fan of keeping the crossover frequency away from the 2khz region because of my lack of experience with this making me think a 2 way is safe and less to go wrong. I think the 1khz region would be better for the crossover dip.
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Last edited by BobtheBuilderMLG; 30th January 2018 at 11:56 PM.
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