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In Reply to: BD-Design Orphean horns are in and running in my system! posted by kurt s on March 23, 2007 at 09:20:41:
Hi Kurt,Congratulations with your new speakers!
I have a "poor man's version" of those, which means the standard (non-modified) BMS 4592 in a large 200 Hz horn. I many respects mine are good too, but I have trouble getting rid of some harshness in the treble, which I am sure you do not have. I really regret that I didn't wait and saved up for the Orphean...
Regards
Peter
Follow Ups:
> I have a "poor man's version" of those, which means the standard (non-modified) BMS 4592 in a large 200 Hz horn. I many respects mine are good too, but I have trouble getting rid of some harshness in the trebleThe relative harshness might be in the horns and/ or the drivers.
The BMS 4592s are very well regarded, so I would have thought more likely the horns - what are your 200 Hz horns?I also have the standard BMS 4592s, anyone know what Bert did other than the phase plug, which I would have thought primarily affected dispersion?
Hi Rick57,Thanks for your reply!
I have a pair of Bentwood 200 horns. They are rectangular 200 Hz horns with an exponential flare.
I have attached a few pictures of the system including the Bentwood horns in the link below. The transition from the circular throat of the horn adaptor to the rectangular section is not quite optimal (although not a disaster either).
I do not know about what Bert D. has done to the standard BMS, and I know that he will not give away his secrets, which I fully understand since he makes a living selling horn speakers. My best quess is that he might have added some cloth inside the driver in order to damp reflections from the BMS high section - but it is only a guess...
Which horns are you using, and are you satisfied with the highs?
Thanks!
Regards
Peter
"I have a "poor man's version" of those, which means the standard (non-modified) BMS 4592 in a large 200 Hz horn. I many respects mine are good too, but I have trouble getting rid of some harshness in the treble, which I am sure you do not have. I really regret that I didn't wait and saved up for the Orphean..."Bert did a lot of good work developing the Orpheans. He has a phase plug in there for starters. He also has a carefully designed crossover. To help you there you might want to get the tweeter crossover capacitor changed to an oil type. That might help.
Kurt
Hi Kurt,Thanks for the answer and for the tip regarding paper/oil caps. Happy listening, I am sure the Orpheans do sound great!
of the passive one developed by Bert ?
The passive crossover is of very high quality, and you can even opt for silver foil caps at a $1K or so premium. The crossover is a first order type designed with all the equalization, etc. built in. An active crossover and bi-amping (or tri-amping even with bass bins) is there as a possibility if you throw out all the passive crossover components yourself, and then you have to engineer a crossover yourself.Maybe Bert can sell you one without the built-in crossover. I just don't see the advantage myself. Even the high end cap choice is cheaper than adding another high quality amp and passive crossover. One good amp with one voice from 220 Hz - 20 KHz seems right for this speaker, and another SS amp for the bass bins. That's just my opinion, of course.
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