I know that Paul Barton at PSB is a big disciple of Toole's work and does his measurements at the NRC and also a lot of work around the vertical placement of the woofers in their tower designs around this topic. Martin logan/paradigm also mention this in their newest design (optimizing the driver placement for boundary interaction and smooth in-room response.Floor bounce is still controversial. Toole has implied it's beneficial, but whether it is or not seems to depend on the music.
The low placement of the woofer definitely has the advantage you mention, on the other hand I would be interested to hear from you why you didn't place one of the woofers high(er) for a more distributed modal excitation?We cross over the driver at about 500 Hz and the low placement of the woofers is to, as Zvu mentions, eliminate the floor bounce in the woofers (and midrange), as it exists above the woofers range and below the midranges range, based of their respective heights off the floor.
Chris,While these are based on the BG NEO8, it's our own design - we tooled our own plates, are using magnets twice as large and a higher grade and have corrugation and some aluminum segments at the edge for damping. Here is a picture of the custom diaphragm.
View attachment 287964
Sensitivity of the mid is pretty high at 96 dB and we have an integrated sealed back chamber.
We cross over the driver at about 500 Hz and the low placement of the woofers is to, as Zvu mentions, eliminate the floor bounce in the woofers (and midrange), as it exists above the woofers range and below the midranges range, based of their respective heights off the floor.
We sent an aspen FR20 out for Klippel NFS testing but there was an issue with the low frequency measurement of the system not being represented in those measurements accurately (by a couple of dB).Chris,
When will you make public the "proper" measurements that you promised when the FR-30 was launched?
I think that with a taller, more expensive speaker model that could definitely make sense. Those widely spaced woofers are more directional, than more closely spaced ones and so we can't do that with our planar midranges without moving to a 4-way system. That ends up being a cost and bass output compromise because a decent proportion of your enclosure volume might be taken up by the 3rd "way" in the 4-way system. It would be possible to do a tapered 3.5 way design though with a pair of woofers on top and bottom but only in a 4 woofer system. with tighter spacing on the inner set of woofers.The low placement of the woofer definitely has the advantage you mention, on the other hand I would be interested to hear from you why you didn't place one of the woofers high(er) for a more distributed modal excitation?
Thank you also for participating here.
500 seems a bit high too me. But I'm no pro so just my 2 cents...While these are based on the BG NEO8, it's our own design - we tooled our own plates, are using magnets twice as large and a higher grade and have corrugation and some aluminum segments at the edge for damping. Here is a picture of the custom diaphragm.
View attachment 287964
Sensitivity of the mid is pretty high at 96 dB and we have an integrated sealed back chamber.
We cross over the driver at about 500 Hz and the low placement of the woofers is to, as Zvu mentions, eliminate the floor bounce in the woofers (and midrange), as it exists above the woofers range and below the midranges range, based of their respective heights off the floor.
Ps audio has better IMD, distortion is very low and good compresion... the ultra very wide horizontal dispersion is just unique from this speaker too. Good bass also.Hi
We may need to put our prejudices on pause (not easy , it is after all PS Audio ). I would reserve judgment until I hear these.
But in regard of their MSRP (about $10,000)
.. The competition is brutal and unforgiving with arguably better objective performance:
I'd rather get one of these
Passive: Kef R11 Meta, Revel F228Be,
Active : Genelec 8351, 8361, Neuman KH 420 !!!
Peace.