Alpair 10p?
I have a longer term project -- one more stab at an OB -- with A10p and a pair of very nice 10" dipole woofers per side in a very intriging baffle.
dave
+1.
Alison was all about dealing with BS, long before the term was coined. If you look at the anechoic response of the big IMFs you can see BS (that was dealt with by putting the boxes in a room)
dave
Perhaps the real question should be "What is the best method of dealing with the baffle step response?"
Is it to use passive circuits or extra drivers or perhaps even very wide baffles?
The answer will; I assume, depend on a lot of variables but all of these may in the end all be overwhelmed by the effects of the room you are listening in.
A .5 woofer added at the -3dB point may be the easiest way to do it but this is not a cheap option, it has the advantage of increasing efficiency tho. We all know after a while that real bass costs
Is it to use passive circuits or extra drivers or perhaps even very wide baffles?
The answer will; I assume, depend on a lot of variables but all of these may in the end all be overwhelmed by the effects of the room you are listening in.
A .5 woofer added at the -3dB point may be the easiest way to do it but this is not a cheap option, it has the advantage of increasing efficiency tho. We all know after a while that real bass costs
As a minimum a ".5" really needs a high pass as well or you have far too much bass when the floor and rear wall kick in.
I don't think cost is the real issue, the 2.5 way is abused to allow the use of (cheaper) under-sized ~6" drivers and narrower cabinets
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Yep.
Not really. Broadband 3-6dB differences are always obvious, for better or worse.
This is a misnomer, the issue is the room and room placement. A true 0.5 only adds at most is +3dB BSC, which is half compensation. Rooms and placement are dominated by the model and can swing wildly, often more than +/-15dB. All well designed subs will boom in a bad room, augmented by poor placement.
Paralleled coherent drivers give +6dB, see this thread http://www.diyaudio.com/forums/multi-way/138121-woofers-working-together-3db-6db.html
You have doubled both driver area and input current
Paralleled drivers gain +3dB acoustically, and upto 3dB electrically. Now if these were 8Ω each paralleled up but driven by an amp rated for a 4Ω load would you still have that upto 3dB electrical gain? Certainly not. Unless the electrical level is compensated for the crossover point (BSC) is affected.
See Frequently Asked Questions
You will never quite get 6dB, as the LF woofer is in series with a large inductor, with significant resistance. Looking at some measurements in Stereophile, several hi-end makes use a MTM with an additional single BSC, giving a more moderate +3.5dB
You will never quite get 6dB, as the LF woofer is in series with a large inductor, with significant resistance. Looking at some measurements in Stereophile, several hi-end makes use a MTM with an additional single BSC, giving a more moderate +3.5dB
Forget Stereophile blah blah on what "others" have done, the facts are the facts. If we completely eliminate passive with their associated losses and went straight active DSP there is only 3dB gain with 0.5. Full compensation requires an additional pair and would yield net 6dB. This of course can be level adjusted to whatever, at whatever crossover point with whatever PEQ and delay.
Yes 10P. I was wondering if the 6P would have been the better choice for mid/treble duties both sound wise and aesthetically(seeing as the Satori's are virtually the same size).
Dave, which has the better high's in your opinion - Maybe the 10P is the better choice anyway?
And a lot of those little mini speakers sounded 'rip your ears off hot on top'. And everyone was used to little speakers sounding thin. By themselves, anyway.
Thanks Dave, I'd like to try the 10P in an OB .. but not sure if it wd work 1st order (mated to the satori's in a BR)
Any reason we shouldn't see the +3dB gain?
The hypothetical amp you've chosen has the current drive, and now the impedance has been lowered such that the extra current will flow.
Chris
Hi,
Utter and complete nonsense. 0.5 way gives very near
6dB change in sensitiviity and very near the full BSC.
Full BSC does not need an extra pair, and no such
impementation exists, because it is totally wrong.
BTW how would you wiire up the 4 drivers you say need ?
Whatever answer you give it is bound to be amusing ...
rgds, sreten.
FWIW 0.5 ways are easier with bass/mids that also
have a rising response on an infinite baffle, and are
difficult / impractical for a drooping mid bass/mid.
However 0.5 ways don't have to be full BSC.
I've never seen it but its entirely possible to
resistor bypass the main BSC inductor to
bleed through more midrange reducing BSC.
(Assuming the main low pass precedes both drivers.)
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