Really, everybody, don't be pedantic!and as shown, -12db down at 50hz, also a poorly designed closed
though it might happen to be like that with most common woofers designed for a ported box, or the small 2way
a good closed design will be -6db down at 30hz
I knocked that up in two minutes in MS Paint for someone who didn't understand it.
An externally hosted image should be here but it was not working when we last tested it.
It shows the essential feature that you get an extra octave with reflex. The real McCoy is below with a 30L box and an 8" reflex driver. A closed box driver behaves similarly. But you'll do better to choose the right one usually. And go for the Vas as size if you can. But we all know that, don't we? We are, after all, PROFESSIONALS.
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Also prefer the sound of closed here. Was slightly dubious when taking the step but now my speakers are closed and any future builds will be too! Why? I just find it more rhythmic and bass lines sound more fluid.
A point which hasn't been mentioned yet too is that closed system roll-off response more closely matches the typical effects of room gain, so you tend to end up with a flatter acoustic response. Additionally, closed will usually handle a bit of EQ at the low end where a ported system might well run out of excursion.
A point which hasn't been mentioned yet too is that closed system roll-off response more closely matches the typical effects of room gain, so you tend to end up with a flatter acoustic response. Additionally, closed will usually handle a bit of EQ at the low end where a ported system might well run out of excursion.
and as shown, -12db down at 50hz, also a poorly designed closed
though it might happen to be like that with most common woofers designed for a ported box, or the small 2way
a good closed design will be -6db down at 30hz
a good vented -3 @28 .........
Really, everybody, don't be pedantic!
I knocked that up in two minutes in MS Paint for someone who didn't understand it.
An externally hosted image should be here but it was not working when we last tested it.
It shows the essential feature that you get an extra octave with reflex. The real McCoy is below with a 30L box and an 8" reflex driver. A closed box driver behaves similarly. But you'll do better to choose the right one usually. And go for the Vas as size if you can. But we all know that, don't we? We are, after all, PROFESSIONALS.
as oppose to not being pedantic an using a woofer with a .50 qts value in a vented enclosure, better suited for seal...
Just saying ....
Ok to have a preference and as to Eq yes, room gain ,no , then there's all that loaded Mass and lower sensitivity .BR are much more difficult to get right , so if not experienced much easier to go Sealed.
I'd take a different line from a.wayne and agree with you totally.
Joachim Gerhard talked about using room gain to advantage with small speakers like his Canalis Anima:
In an ideal world, I would have given these closed box 6" basses more than a tiddly 8 Litres and stuffing, but they are actually quite astonishingly good and create enough illusion of bass to satisfy. I think they have the traditional acoustic suspension advantage of very low distortion. They go loud and undistorted beyond the point where a reflex would send the cone across the room!
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Sealed enclosure will have lower sensitivity at specific frequencies , I'm sure you know that ........
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You're just arguing for arguings sake, my friend.
These 30L Monitor Audio closed boxes are 90dB efficient.
An externally hosted image should be here but it was not working when we last tested it.
But my Auntie Vee doesn't want them. Too big. She wants the little tiddly ones for her new living room.
And if she puts them on anything but the window ledge or sideboard, I'll eat my hat!
I wouldn't be surprised if she wants them in white or pink too. LOL
Women have a different view of what is tolerable.
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Lower sensitivity at specific frequencies? What specific frequencies are you referring to?
se
That's strange, I've not had that problem. Mind you I did grow up with a hammer in one hand and a saw in the other.
C'mon Steve, everyone knows if you're gonna move some air you need one 'o' them there rotary woofers.
Even a 5" FR can outperform some much larger drivers if you give them the right box.
Well Steve, I might just have you beat even with the RS1354A. Mind you not everyone can sneak a box like that into their livingroom without a wee of consternation
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Steve,
1. Thank you, it's a copy of the Cornu by Daniel Ciesinger.
2. Yes, the RS 40-1354A 8Ω auto driver eh!
3. Yes, wall mounting is imperative.
4. The driver chamber is stuffed like a muffin tin liner and a small portion of the throat is as well depending on the driver and the environment. Stuffing has more effect than any other enclosure I have encountered. It's all trial and error once you have them mounted.
1. Thank you, it's a copy of the Cornu by Daniel Ciesinger.
2. Yes, the RS 40-1354A 8Ω auto driver eh!
3. Yes, wall mounting is imperative.
4. The driver chamber is stuffed like a muffin tin liner and a small portion of the throat is as well depending on the driver and the environment. Stuffing has more effect than any other enclosure I have encountered. It's all trial and error once you have them mounted.
a.wayne,
It's my weapon of mass audio destruction. I can annoy neighbours for 100 feet all around.
It truly is the only cabinet I can think of that squeezes out every ounce of what the driver has to offer.
Super fast build and seriously fun for the speakerholic. This is the 4th one I've done.
Sorry, I just realized I've gone way off topic. My apologies to the OP. If you want me to remove these posts, I have no problem, just PM me.
It's my weapon of mass audio destruction. I can annoy neighbours for 100 feet all around.
It truly is the only cabinet I can think of that squeezes out every ounce of what the driver has to offer.
Super fast build and seriously fun for the speakerholic. This is the 4th one I've done.
Sorry, I just realized I've gone way off topic. My apologies to the OP. If you want me to remove these posts, I have no problem, just PM me.
since every one of them I've ever known personally puts up with us and our $hit far more gracefully, or at least discretely than is the reverse case, we should be grateful of that
I think that talent predated the Cornys
you mean your favorite to date? we can never know what we don't know
like OBs or PA sized front loaded horn systems than can annoy neighbour 100 blocks away, unfortunately not a design that is suitable for all domiciles
ditto
I dont mind a bit its all audio related and interesting reads, thanks for stopping by
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