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35-60hz design? |
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smoore 
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Joined: 30 March 2011 Location: N.Devon Status: Offline Points: 937 |
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 Topic: 35-60hz design?Posted: 17 February 2015 at 12:47am |
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Hey guys I have some fane 15''s (which I guess i will change if they are not fit to the task) and I want to design a box for them to go under some kicks that play 60-120.
What is the most efficient sub design for 35-60hz? Was thinking tapped horn, but not sure if a big Reflex or a BP6 like the X1 would be better? They will be used indoor, and size is not an issue. Although want front dimensions to be roughly 720x500. Not fussed on a huge huge output (not expecting much from 15''s) I just want those real deep notes to be at least heard. Any suggestions? Thank you in advance
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kr1sounds
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Joined: 28 June 2014 Location: ThePromiseLand Status: Offline Points: 920 |
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Posted: 17 February 2015 at 1:09am |
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http://www.faneinternational.com/resources.aspx
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I MAN SERVE SELASSIE CONTINUALLY... NO MATTER WHAT THE WEAK HEART SAY
fostonshfs.webs.com |
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Twiggy
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Joined: 25 January 2012 Location: Portsmouth Status: Offline Points: 432 |
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Posted: 17 February 2015 at 4:44am |
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The x1 you mention does 35-80 very well, but not with 15" drivers.
The 125l cab in the link above? Or could look maybe at a push pull design? |
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smoore
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Joined: 30 March 2011 Location: N.Devon Status: Offline Points: 937 |
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Posted: 17 February 2015 at 8:23am |
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Hey guys, as I said I'm happy to have a go at designing something. Just wandering what design you guys would use eg tapped/folded/reflex/BP6 etc etc.
Thankyou for the link. Maybe a big old reflex box would be better than a tapped horn? Wouldnt a tapped horn be much more efficient though? |
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Hemisphere
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Joined: 21 April 2008 Status: Offline Points: 2272 |
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Posted: 17 February 2015 at 9:16am |
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Tapped horn would definitely be more efficient than reflex, possibly a lot more if you expand the system to include multiples. Designing a tapped horn from scratch is a lot harder than a reflex but there are so many designs online it's not hard to find one that will fit your driver (simulate it in Hornresp and look for a design with plenty of build reports and praise if possible rather than just a plan)
Diyaudio is one place to start and if you can't find one that fits your needs exactly you should find one similar enough to adapt by scaling up or adding folds, then resimulate with the new data. Try and keep the mouth and throat more or less as the plan as they're the most critical parts in determining the sound. 18 inch TH design posted below here  does a good 35 Hz or even a touch below and may be adaptable for a 15". 920 x 640 front dimensions though.. Edited by Hemisphere - 17 February 2015 at 9:54am |
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Elliot Thompson
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Joined: 02 April 2004 Location: United States Status: Offline Points: 5175 |
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Posted: 17 February 2015 at 1:53pm |
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Reflex all the way.
My smallest bass cabinet (Double Fifteen) is capable of registering down to 25 Hz. Personally, I would not use a cabinet that cannot produce at least 30 Hz with ease. My preference has always been low bass so no other cabinet meets my requirements than a reflex box. The videos below shows how low a Double Fifteen Reflex can go... Best Regards, |
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Elliot Thompson
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mini-mad
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Joined: 13 July 2012 Location: london Status: Offline Points: 6903 |
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Posted: 17 February 2015 at 2:21pm |
Would you mind sharing your double 15 design please.... |
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If it sounds like a gorilla is trying to escape, turn it down.
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Elliot Thompson
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Posted: 18 February 2015 at 12:18pm |
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I am Sorry, I do not share my designs.
Best Regards, |
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Elliot Thompson
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smoore
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Joined: 30 March 2011 Location: N.Devon Status: Offline Points: 937 |
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Posted: 18 February 2015 at 12:25pm |
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Hey guys thanks for the response... Thanks for the advice elliot. I currently have 2x fane sovereign pro 15-600 that I'm not sure would go well in a reflex but I will make a simulation and check.. As I would love to hear what they can do that low..
Funnily enough they simmed rather well in my own tapped horn design I've been working on. And it appears to be incredibly similar to the one you've just posted! haha. It's good to know we're thinking on the same lines. Really incredible how similar they have ended up. Very reassuring that i've come up with something that obviously works..  1w/1m in 1pi. with f3 of 28.4hz at 101.4 and that 35hz peak at 104.3db  Cant wait to get home and build one! Gotta wait a few weeks first |
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mini-mad
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Posted: 18 February 2015 at 2:44pm |
Booooòòooooooooooo...... your no fun! Lol |
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If it sounds like a gorilla is trying to escape, turn it down.
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tomr_29
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Joined: 23 February 2009 Location: West Midlands Status: Offline Points: 540 |
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Posted: 18 February 2015 at 3:23pm |
Hi Elliot. Completely respect your decision not to share plans but could you possibly give a little info on the approximate volume / tuning you used for the Eminence Alpha 15a for those videos? Just based on the published specs (pinch of salt taken) they don't look particularly suitable for reflex loading. I Also can't see how a driver with such a weak motor (BL of 7.7) and such limited xmax (3.8mm) could produce much useful SPL at such low frequencies. A large low-tuned reflex cab could do it but the driver would have no control outside the tuned envelope making the extended upper range normally associated with reflex pretty much unusable. Unless you use stacks and stacks of them feeding each driver very little power? Edited by tomr_29 - 18 February 2015 at 3:33pm |
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Proper capitalisation is the difference between helping your Uncle Jack off a horse and helping your uncle jack off a horse.
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Elliot Thompson
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Posted: 18 February 2015 at 5:04pm |
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I never made an enclosure for those woofers. I merely removed my existing fifteen inch woofers (RCF) from my double fifteen inch box and place the Eminence inside. There is a topic I made using those woofers in a reflex box. What you are asking with the exception of the enclosure size was already answered there.
http://forum.speakerplans.com/eminence-alpha-15a-double-fifteen-playing-reggae_topic85823.html Best Regards, |
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Elliot Thompson
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Elliot Thompson wrote: