ORIS 150 and Lowther PM6a (BD-Design)
by Sibi 
, Germany, Sunday, February 26, 2006, 12:47 (6628 days ago)
Greetings to all!
I'm new in this forum. First let me introduce myself - my name is Thomas and I live in Germany. In the past weeks I read a lot of things about hornspeaker, fullrange speakers and last but not least ORIS at Bert's fantastic Website. Thanks Bert!
Recently I bought a used pair of ORIS 150 horns with stands from a forum member.
Fistly, I merge the horns with two matched Lowther PM6a, wich a friend of mine had in stock.
The first hours of listening were impressive!
Due to my researche througt the forum, I became aware that nearly none of the ORIS-User uses this speaker and what is it, that makes this speaker not even convenient in this combination?
Regarding a small budget, I want not start with the AER-drivers and therefore I'm looking for another speaker solution.
Thanks for help.
Regards
Thomas
ORIS 150 and Lowther PM6a
by Bert , Sunday, February 26, 2006, 14:19 (6628 days ago) @ Sibi
Hi Sibi,
Welcome to this Forum!
Due to my researche througt the forum, I became aware that nearly none of
the ORIS-User uses this speaker and what is it, that makes this speaker
not even convenient in this combination?
There is nothing wrong with that combination, the Showroom only shows a few Oris system that are present around our world. In the Oris horns you can use several types of suitable drivers which all perform very well... 
Regarding a small budget, I want not start with the AER-drivers and
therefore I'm looking for another speaker solution.
No need to start with AER drive units, what is wrong with the PM6A's if you like these from the start? If you need something else to start with then why not with the Fostex FE206E's?
Ciao,
Bert
--
BD-Design - Only the Best!
ORIS 150 and Lowther PM6a
by Sibi , Germany, Monday, February 27, 2006, 22:48 (6626 days ago) @ Bert
Hello!
Thanks for the fast reply!
Please let me ask another question...
In the moment I'm using the Lowther PM6a chassis in the horn with your plugs and crowns.
Regarding my subjective perception, the "soundfield" produced from the loudspeakers is very much depending on orientation.
Therefore for a complete holographic picture and sound, I have to sit exact in the middle of them. In my "loudspeaker-life" I tried always to avoid this way of listening. In my opinion, the music should be listenable in almost each position in the room without great losses.
Before I start to fiddle about with other speakers (Fostex etc.), please let me know from your experience ... could changing the driver add more room and stage to the ORIS horns???
Could the AER MK3 be the solution for my subjective problems? My listening distance is about 3 meters in front of the speakers and my listening base ist about 3 meters wide.
Regards
Thomas
ORIS 150 and Lowther PM6a
by Bert , Tuesday, February 28, 2006, 00:06 (6626 days ago) @ Sibi
Hi Thomas,
Before I start to fiddle about with other speakers (Fostex etc.), please
let me know from your experience ... could changing the driver add more
room and stage to the ORIS horns???
The horns are directive and pretty clear regarding the time domain reproduced. These reasons gives the system a relative small sweetspot.
Could the AER MK3 be the solution for my subjective problems? My listening
distance is about 3 meters in front of the speakers and my listening base
ist about 3 meters wide.
With an AER driver this problem is less but still present. The PM6A's do not have the real magnet strength and high frequency extention (similar to the Fostex FE206E's) so that you only have high frequencies pretty much on axis, off-axis makes them sound more dull due to this.
3m is pretty short distance, further away opens the sound (more reflections from the room) making the sweetspot wider. You can remove the MDF back cover and the woolfelt circle to open the sound for your listening distance. This gives less body to the sound but with the PM6A's this would not be much of a problem.
Let me know your experiences with this "test"...
Ciao,
Bert
--
BD-Design - Only the Best!
ORIS 150 and Lowther PM6a
by Sibi , Germany, Tuesday, February 28, 2006, 11:16 (6626 days ago) @ Bert
Good morning!
Thanks for reply Bert.
The horns are directive and pretty clear regarding the time domain
reproduced. These reasons gives the system a relative small sweetspot.
Agree - regarding listening to horn speaker, this is an inherent issue.
With an AER driver this problem is less but still present. The PM6A's do
not have the real magnet strength and high frequency extention (similar to
the Fostex FE206E's) so that you only have high frequencies pretty much on
axis, off-axis makes them sound more dull due to this.
Exact! I'ts the "dull-sound" which i became aware regarding the Lowther's...hopefully this will mostly vanish with the appropriate AER drivers and the sweet spot will be significant wider than before?
3m is pretty short distance, further away opens the sound (more
reflections from the room) making the sweetspot wider. You can remove the
MDF back cover and the woolfelt circle to open the sound for your
listening distance. This gives less body to the sound but with the PM6A's
this would not be much of a problem.
Let me know your experiences with this "test"...
I'll test it this evening!
Thanks again for your support!
Thomas
ORIS 150 and Lowther PM6a
by Bert , Tuesday, February 28, 2006, 13:46 (6626 days ago) @ Sibi
Hi Thomas,
Exact! I'ts the "dull-sound" which i became aware regarding the
Lowther's...hopefully this will mostly vanish with the appropriate AER
drivers and the sweet spot will be significant wider than before?
Yes, it will be wider (more high frequency energy overall) but the optimal place remains in the center if you listen stereo though.
Ciao,
Bert
--
BD-Design - Only the Best!
ORIS 150 and Lowther PM6a
by Sibi , Germany, Wednesday, March 01, 2006, 14:18 (6625 days ago) @ Sibi
Hello Bert!
As promised, I tested your suggestions last evening...and it was successful!
The sound becomes more opened. Irrespective this and regarding the "dull sound" I'll test the AER driver as next step.
Thanks again for help!
Regards
Thomas