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PostPosted: Sat Oct 29, 2016 11:05 am 
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Joined: Mon Mar 31, 2008 9:17 am
Posts: 14913
Location: Toronto, ON, CA
I've built a few, but nothing that nice.

Good work!

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PostPosted: Wed Nov 02, 2016 6:22 pm 
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Joined: Mon Nov 11, 2013 2:21 pm
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Location: Nanaimo, BC, CA
Just finished these up a week ago. First venture into curving sides. Pardon the mess in the project room

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PostPosted: Wed Nov 02, 2016 7:14 pm 
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Joined: Mon Sep 19, 2011 11:28 am
Posts: 17
Location: vancouver, BC, CA
Ed Zeppeli wrote:
Just finished these up a week ago. First venture into curving sides. Pardon the mess in the project room

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Really love them Ed! Can you tell us the drivers that you used?


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PostPosted: Wed Nov 02, 2016 7:27 pm 
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Joined: Mon Nov 11, 2013 2:21 pm
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Location: Nanaimo, BC, CA
Thanks much. They are a bit of a JBL 1400 Array clone but for the woofer I'm using 2234H 15s. Up top the horn contains the JBL 435al and 045ti; both comp. drivers.

The horn module contains passive filtering for the two compression drivers and I'm bi-amping between that and the woofer.

I have a Venu360 on the way and am excited to get them tuned up with it.


Warren


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PostPosted: Thu Nov 03, 2016 9:04 pm 
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Joined: Sat Dec 29, 2012 8:16 pm
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Location: New Westminster, BC, CA
The west coast representin'. You see, we do put down the medical marijuana from time to time.


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PostPosted: Thu Nov 03, 2016 11:10 pm 
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Location: Vancouver, BC, CA
Awesome work fellas. Any chance of an audition?! :P


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PostPosted: Fri Nov 04, 2016 2:49 am 
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Joined: Sun Mar 10, 2013 6:57 pm
Posts: 188
Location: Ontario, ON, CA
I am curious about something. A lot of the classic Klipsch speakers use passive radiators as opposed to ports in their cabinets to promote bass frequencies. Which is better or easier to fine tune?


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PostPosted: Fri Nov 04, 2016 5:23 am 
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Location: Montreal, QC, CA
wtf22 wrote:
I am curious about something. A lot of the classic Klipsch speakers use passive radiators as opposed to ports in their cabinets to promote bass frequencies. Which is better or easier to fine tune?


Passive radiators have certain advantages over classic bass reflex tuning including having double or more bass radiating area and smaller cabinet size, but the engineering to tune them properly is more complicated. The basic engineering is actually simpler but getting the best out of such a deign is where things get finicky. There have been tons of passive radiator designs that were sold and worked well enough, but had more attention been paid to the engineering, the resulting speakers would have been much better with even flatter and more extended bass response.

Klipsch were far from alone or the first in using passive radiators, but at least their passive radiator designs were better than most.


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PostPosted: Sat Nov 05, 2016 2:53 am 
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Location: Ontario, ON, CA
Thankyou for the explanation, I'm mulling about a future speaker project that will be very simple and leaning towards best bang for the buck territory. A passive radiator may factor into the equation.


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PostPosted: Sat Nov 05, 2016 5:01 am 
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Location: Montreal, QC, CA
wtf22 wrote:
Thankyou for the explanation, I'm mulling about a future speaker project that will be very simple and leaning towards best bang for the buck territory. A passive radiator may factor into the equation.


If you get the appropriate plans, either ported or passive radiator types are easy enough to build as all the calculations have been done for you ahead of time. Based on the same bass driver, the regular ported box will need to be deeper and physically bigger to get the same bass extension as the passive radiator design. One classic textbook example is a case where an 8" woofer was used with a 10" passive radiator in a roughly 2 foot high, 15 inch wide and 11 deep enclosure which was flat down to 40 Hz. To get the same bass extension from that same bass driver, a regular ported enclosure would have needed to be big enough to have 4 and a half foot long, 9 inch diameter tuned port.

Another example of just how compact a box a passive radiator can allow is one using a 6.5" woofer and an 8" passive radiator in a box only 28" high, 16" wide and 6" thick and flat down to 50Hz, but that 6" thick is a bit misleading as that included a 1" thick grille and a base slightly deeper than the speaker enclosure itself!


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PostPosted: Sat Nov 05, 2016 4:45 pm 
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Joined: Sat Dec 29, 2012 8:16 pm
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Location: New Westminster, BC, CA
Ports or PR's - better, easier, bang for the buck?

Ports win the latter 2 easily. Better comes down to implementation. There is certainly much more information available on sizing ports. An advantage for PR's is that you can stuff the cabinet with fibreglass insulation and not worry about loose fibres in your living room.


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PostPosted: Tue Nov 08, 2016 7:45 pm 
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Joined: Thu Aug 31, 2006 9:10 am
Posts: 472
Location: Oshawa
Awesome builds! I've built a few things but this is the last one I've got. Open baffles with twin 15" in each and a compression driver and horn. Eminence and Selenium combo so nothing too expensive. I'm very happy with the build. PS don't make fun of my shoe rack coffee table LOL. Its an experiment to see how much better it is for audio than a glass coffee table even though I cant rest a drink on top easily.

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I've also got these small two way still on the go (sorting the crossover). Its based around Eminence 8" and compression tweet. Once its all done, these will get some grills as well.

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PostPosted: Wed Nov 09, 2016 1:10 am 
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Joined: Sat Mar 24, 2007 11:44 am
Posts: 416
Location: Clinton, ON, CA
It was a long winter but built
6...MCL - PD218. ...Double 18s
6...MCL - PD124. ...Single 24s. ..that's right
6...MCL - PD 215. ..Double 15s and JBL 2446


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PostPosted: Wed Nov 09, 2016 3:28 am 
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Joined: Sat Nov 27, 2004 8:48 am
Posts: 117
Location: London, ON, CA
Optima,those look Amazing,and I bet they sound even Better!.....Huge Talent!

......I really like 'Wood'n'Speakers'...together,or something,'totally different',& pretty much anything diy its just,so Inspirational,that I want to head straight for my Workshop!..
Oh well,Retirement isn't too far way,and I can't wait!

....my contribution,hm..Altec 19 Baltic Birch cabs,and recently painting my Emerald Physics 4.3 baffle boards & wiring...does that count? Ha...
Have to admit,they're,not exactly,as complex as your Beautifully executed design,but I'm "Hooked on the Look' & Almost Live sound of these Open Baffle,hope you get more power soon!

Some Fun OB's are awaiting my table saw,maybe this weekend,I want to have some Thicker baffles like the EP's,a Fun project..

......I'm also wanting to get some Fostex 167e's for a Tall pair of B.I.B's,please anybody with some 167's they want to trade for Fostex 126's,+early Frugalhorns please email me.

....EP Concert Kenny
...................Happy diy'ing..............the weekends concert..PINK,Live in Europe

.........the other posters projects show the great wealth of ideas simmering in our minds,waiting......


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PostPosted: Wed Nov 09, 2016 10:55 am 
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Joined: Tue Jun 17, 2008 7:28 pm
Posts: 40
Location: London, ON, CA
My wife is pretty open to my space hogging hobbies but I think it's easy to play spot the single guys in this thread.


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