sorry, I didn’t mean post 106. I meant this is the 106th thing I can say I told you so, that SETs are not going to be required on the pendragon
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Ron’s New System
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sorry, I didn’t mean post 106. I meant this is the 106th thing I can say I told you so, that SETs are not going to be required on the pendragon
I'm confused, because I wrote that I don't have the desire presently to investigate SETs that I thought I would have.
sorry edited my previous post. somehow had missed out “not”
Finally someone comments what I’ve been wondering about.
I’m not a pro nor do i understand room measurements , but the drop seems odd and Ron keeps saying there is still some glare.
i wonder if tow in effects the sound
Ron, just for my curiosity... have you measured the distance from front baffle of the speakers and listening position?
No high power Russian tubes for me -- for high power for me it is Eimac or nothing.
Ron ... thats pretty damm good for the short time you've spent !
Not sure if iPad is the last word in plots but it is indicative and each plot is relative.
As I understand it pink noise rolls off about 30db from 20 hz to 20khz so flat would be the red line on the graph so the brightness you hear may be the sag between 100 and 1000hz
I would favour a target similar to the green line .. this is similar in the hf range to what linkwitz determined was correct for dipoles .. and I like to goose it a bit in the bottom end
Of course this could just be a problem with meaurement .. not sure how its all processed
Has anyone suggested moving the bass towers inboard and leaving M/T where it is .. just to get them further away from wall .. just to delay wall reflections ... esp 250hz
Regardless its looking good
Cheers
Phil
Thank you, Phil!
Actually, Don Saltzman suggested moving the woofer towers one foot and two feet behind the ribbon panels. I vetoed that idea for now as 1) the woofer towers don't have the continuous phase adjustment (they don't have any phase adjustment) or time delay variability of Gary Koh's more complex Genesis woofer towers, 2) while I am not terribly sensitive to discontinuity, I am hearing no discontinuity between the towers with them right next to each other and I do not want to introduce any discontinuity, and 3) I consider the first stage done, and I just want to enjoy the system playing music for the foreseeable future, playing maybe only with absorption panels to and fro.
Someday in the future when I have the appetite for it I will definitely return to tower repositioning experimentation.
Now that the 20Hz drop off has disappeared I think that TubeTraps may do a respectable job of dampening the 65Hz peak.
I cannot help but wonder whether this path might not have proven a little less strewn with angst and introspection … there being such a sense of calm tranquility eminating from the writing regarding this system within the OP.
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I tend to agree with you re offset woofers as 250hz is in the range where you perceive location ( above 170hz supposedly)
Having said that I have a minidsp on woofers and the latency adds about 300mm in a time sense and it sounds ok to me at 210hz xover.
I am building an active crossover to improve that ( or at least bought the parts)
Time to enjoy it for a while before diving into fussing around again !
Cheers
Phil
Yes, unfortunately it seems the mobile phone application is not able to smooth spectra or compute slopes.
See for example, the Sonus Faber Aida in my room (two different distances from speaker to back wall, REW , 1/6 octave smoothing - different, surely, but comparable with the Stereophile in room measurement in M. Fremer listening space.
)
Well, I doubt that Gryphon intended it, but you have an exquisite instrument for amplifier experimentation. Crossed over at 250 Hz, two thirds (maybe even more) of the power band requirement in the bass and lower midrange towers are already handled, leaving a third (maybe even less) of the power band requirement for the ribbons. Even at a nominally stated line array sensitivity of 89db, you wouldn't necessarily need high power for good results. It also doesn't look like it is difficult to splice amplifiers into and out of the ribbons.
Sooner or later, you will probably crave something a bit different just because. Your listening panel could probably bring amps over for comparison.
I was part of the crew who came by last Saturday. This was a celebration amongst friends for the launch of Ron's new system. We talked. We ate. We sipped. We shared great records and tapes. We had a good time!
What did I hear? A combination of components I've not heard before, all in various stages of break-in, playing in a room that I'm not familiar with. I'm not gonna pass judgment on that.
Some of what I heard was stunningly good. The soundstaging was huge! The orchestra seating of Mehta's L.A. Phil performing Mahler 3rd was precisely mapped across the space between the speakers. Low frequency punch was tight and visceral. On the other hand, with a few tracks, at certain levels, those Pendragons really did breath fire. Ouch. But that'll get fixed. We indulged in swapping acoustic treatments while we listened, and we learned a few things from that. But that's not the main reason we were there.
We were there to celebrate Ron's new system.
Mission accomplished!
Russ
What did I hear? A combination of components I've not heard before, all in various stages of break-in, playing in a room that I'm not familiar with. I'm not gonna pass judgment on that.
Some of what I heard was stunningly good. The soundstaging was huge! The orchestra seating of Mehta's L.A. Phil performing Mahler 3rd was precisely mapped across the space between the speakers. Low frequency punch was tight and visceral. On the other hand, with a few tracks, at certain levels, those Pendragons really did breath fire. Ouch. But that'll get fixed. We indulged in swapping acoustic treatments while we listened, and we learned a few things from that. But that's not the main reason we were there.
We were there to celebrate Ron's new system.
Mission accomplished!
Russ
I stopped using a mobile phone for this purpose two weeks ago.
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Thank you, Russ! It was wonderful to have you and the crew over for the first official visit!
Then why not moving to REW? It is user friendly and extremely powerful and reliable in the analysis. Besides it is a free standard tool used by many audiophiles and the DIY community - we can find many tutorials and helpful people in the REW net users.
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