|16th February 2010, 08:58 AM||#13|
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
That is essentially what you get when you stack multiple ripoles
|18th February 2010, 08:40 AM||#14|
Join Date: Mar 2008
such a dipole standing on the floor with sound particle direction
orthogonal to the floor would have poor efficiency IMO.
1) For a Transducer based on sound particle velocity, the
position near a wall (floor) is in general the most
disadvantageous you can choose, because sound
particle velocity near walls tends to zero and the room
modes cannot be excited efficiently from there.
A wall (floor) can support a dipole sub only if the direction
of sound particle velocity is parallel to the wall.
2) Direction of sound particle velocity is bad especially
for exciting the lowest room modes which are usually
in the horizontal plane, because distances of the side walls
are longer than the distance from floor to ceiling.
3) You loose IMO one major advantage of a dipole sub:
The possibility to balance excitation of room modes by
rotating the direction of particle velocity !
This is a unique balancing technique which cannot be done
using monopolar subwoofers. Monopoloar subs have to be
moved around to balance excitation of room modes.
Dipoles can move AND rotate to modify in room response.
This is an additional degree of freedom usable for balancing
in room response which cannot be over estimated IMO.
Oliver, RFZ believer (?)
Last edited by LineArray; 18th February 2010 at 08:46 AM.
|18th February 2010, 10:22 AM||#15|
diyAudio Moderator R.I.P.
Hmm, ok, you seem to know this
But it seems to me that some kind of "omni" dipole might work well
At least the one Im listening to right now
But its not something I tried properly, yet
The one I showed was an attempt on that, an "omni" dipole
No, I dont expect it to be very loud
I never play loud
So, you saying that if its turned around, and playing along the side walls, it will be better
Ahh, we could call it Z-fold, or Zorro
|18th February 2010, 01:21 PM||#17|
Join Date: May 2004
Location: Montreal, Canada
Well I had my idea on the subject a few years back for a Z frame, here is what it looked like below. It works great for music but as you mite guess the system as limited headroom.
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