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-   -   Ciare 18SW Bass Driver use in a BIG Sealed Box? (https://www.diyaudio.com/forums/subwoofers/354939-ciare-18sw-bass-driver-sealed-box.html)

darkmatter 23rd May 2020 01:31 PM

Ciare 18SW Bass Driver use in a BIG Sealed Box?
 
Looking around there are very few 18" Bass drivers that seem suitable for sealed box use, perhaps this one fits the bill? An odd set of parameters though.

Ciare 18SW

Ciare 18.00SW - 18" Subwoofer

This one that is ideal, The McCauley 6174 but is not available in the UK if at all?.

Looking for UK available alternatives which would work in a sealed enclosure.

Thoughts?

Thanks :)

chris661 23rd May 2020 01:59 PM

Pretty much anything will "work" in a sealed box. What sort of performance are you hoping for?

Chris

darkmatter 23rd May 2020 02:10 PM

Quote:

Originally Posted by chris661 (https://www.diyaudio.com/forums/subwoofers/354939-ciare-18sw-bass-driver-sealed-box-post6215831.html#post6215831)
Pretty much anything will "work" in a sealed box. What sort of performance are you hoping for?

Chris

Thanks for your reply.

20Hz or better in room performance is the target, and a 2-300 litre enclosure is not a problem so the device will be big.

I will be building a pair

chris661 23rd May 2020 02:35 PM

Well, here's what a pair of sealed 8"s does in-room:

https://i.imgur.com/23gwOqJ.png
(SPL not accurate)

You don't need big drivers and boxes to get low into the bass, but you do need those things if you want to go loud.

Chris

darkmatter 23rd May 2020 03:38 PM

Quote:

Originally Posted by chris661 (https://www.diyaudio.com/forums/subwoofers/354939-ciare-18sw-bass-driver-sealed-box-post6215865.html#post6215865)
Well, here's what a pair of sealed 8"s does in-room:

https://i.imgur.com/23gwOqJ.png
(SPL not accurate)

You don't need big drivers and boxes to get low into the bass, but you do need those things if you want to go loud.

Chris

Yes worked out that I might get away with 15" at a push, but 18" will be needed to produce the output I require.

chris661 24th May 2020 08:46 AM

Fair enough.
Got any signal processing, and how much amplifier do you have?

Chris

darkmatter 25th May 2020 03:14 PM

Quote:

Originally Posted by chris661 (https://www.diyaudio.com/forums/subwoofers/354939-ciare-18sw-bass-driver-sealed-box-post6216755.html#post6216755)
Fair enough.
Got any signal processing, and how much amplifier do you have?

Chris

Might use DSP mini or something similar, but got 2 x 1Kw rms 8 ohms

GM 25th May 2020 09:04 PM

Not UK, just a frame of reference; at the allowable net Vb, these will 'loaf' along with little power required, though with plenty of dynamic headroom built in if later desired: HS-24 mkIII 24″ Subwoofer – Stereo Integrity

GM

darkmatter 25th May 2020 09:07 PM

If only

I am limiting my investigations only to drive units easily available in the UK

Richard Ellis 25th May 2020 09:52 PM

Crunching the numbers on WinISD for a ported type, (their recommendation at EBP of 65)....I get a much more extended bottom-end.
Internal volume, 188 Liters
Tuned frequency, Fb, 28.9 hertz
Port, 200mm diameter, 440mm long
-3.06 Db @ 25.95 hertz ....
A much more functional & accurate portrayal of low frequencies...

People up one side & down the other will be saying, a sealed enclosure is superior...trotting out many adjectives, like "tighter"...blah, blah blah, often without documentation to back it up...& likely those differences are beyond our hearing capabilities anyway.



----------------------------------------------------------------------Rick..........


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