Small Portable Weatherproof Speaker - Page 2

mrduke · 8th November 2012, 01:48 AM

Just reading the specs and not simulating it, I think those drivers start to look ok. However, you might want to think about your design preferences before ordering and designing crossovers. For example, how big can the box be, and do you prefer ported ("more" bass but bigger box) or sealed ("less" bass but smaller enclosure without holes in) design.
How large is the internal volume of the box you was planning for?
Also, how loud do you want it to be? 86 db/1W is ok but not stunning.

The tweeter does not need a enclosure at all, but it is most convenient to mount it in the same one as the woofer. Mostly because you want somewhere to hide the cables, and positioning is tricky otherwise ;-)
No seriously, it goes in the same enclosure as the woofer.

smscad · 8th November 2012, 02:01 AM

I'm looking at about a 2.5L enclosure each side. I was thinking sealed but am open to suggestions. My overall design is about 150x150x300

Is 86 db/1W to low. Would I be wise to look for a higher sensitivity say around 90 db/1W. I've really got no idea how loud that is.

mrduke · 8th November 2012, 02:14 AM

I simulated the Vifa driver in winISD with 2 liter (per driver) sealed enclosure. Something like that should be ok. Qtc is close to 1, and F3 is about 122 Hz.

mrduke · 8th November 2012, 03:43 AM

Ah did not see your last message. 2.5 liters if good too. Gives slightly lower Qtc and F3 which is good. Those speakers works best in sealed design.
90 dB/1W would mean that the setup would be more than twice as loud.
With 86 dB/1W, 8 Ohm speakers and a TA2020 chip you would reach something like 98 dB at full blast, perhaps a little more.
I would say it is enough for normal to loud music listening, bbq etc, but not loud enough to have drunken all-out party. Maybe indoors...

smscad · 13th November 2012, 08:08 PM

Received the amp yesterday.

sreten · 13th November 2012, 09:39 PM

Hi,

The Vifa fullrange doesn't need an additional tweeter, use it on its own.

rgds, sreten.

smscad · 14th November 2012, 07:40 PM

Thanks sreten,

I'm thinking that just the driver without tweeters may be my best option as it is my first build.

13th November 2012, 09:39 PM	#16
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, The Vifa fullrange doesn't need an additional tweeter, use it on its own. rgds, sreten. __________________ There is nothing so practical as a really good theory - Ludwig Boltzmann When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

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8th November 2012, 01:48 AM	#11
mrduke diyAudio Member Join Date: Jan 2012	Just reading the specs and not simulating it, I think those drivers start to look ok. However, you might want to think about your design preferences before ordering and designing crossovers. For example, how big can the box be, and do you prefer ported ("more" bass but bigger box) or sealed ("less" bass but smaller enclosure without holes in) design. How large is the internal volume of the box you was planning for? Also, how loud do you want it to be? 86 db/1W is ok but not stunning. The tweeter does not need a enclosure at all, but it is most convenient to mount it in the same one as the woofer. Mostly because you want somewhere to hide the cables, and positioning is tricky otherwise ;-) No seriously, it goes in the same enclosure as the woofer.

8th November 2012, 02:01 AM	#12
smscad diyAudio Member Join Date: Sep 2012 Location: Maitland	I'm looking at about a 2.5L enclosure each side. I was thinking sealed but am open to suggestions. My overall design is about 150x150x300 Is 86 db/1W to low. Would I be wise to look for a higher sensitivity say around 90 db/1W. I've really got no idea how loud that is.

8th November 2012, 03:43 AM	#14
mrduke diyAudio Member Join Date: Jan 2012	Ah did not see your last message. 2.5 liters if good too. Gives slightly lower Qtc and F3 which is good. Those speakers works best in sealed design. 90 dB/1W would mean that the setup would be more than twice as loud. With 86 dB/1W, 8 Ohm speakers and a TA2020 chip you would reach something like 98 dB at full blast, perhaps a little more. I would say it is enough for normal to loud music listening, bbq etc, but not loud enough to have drunken all-out party. Maybe indoors...

14th November 2012, 07:40 PM	#17
smscad diyAudio Member Join Date: Sep 2012 Location: Maitland	Thanks sreten, I'm thinking that just the driver without tweeters may be my best option as it is my first build.