• Well, maybe PG should be happy. - neolith 13:19:30 07/17/08 (5)
  In Reply to: RE: Thanks, neo... posted by Jim Treanor on July 17, 2008 at 12:35:06

  It sounds like the solution may be Magnestands or Grant's Mye Stands. It sounds like the added bass response is shaking the panels and that excess energy needs to be drained or stablized. Whether you believe the argument that stands stabilize the panels or, as PG maintains, the excessive vibration is drained by wood or stands, the benefits are going to be great. I have yet to hear anyone say there was anything less than a huge improvement with Mye stands or Magnestands. Being a cheapskate, I am using my own DIY stands and the difference is quite noticeable.
  

  I may be an egoist but at least I don't talk about other people.
  
  

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  • Reframing and rebasing is the next step. - Jim Treanor 13:39:33 07/17/08 (4)
    In Reply to: RE: Well, maybe PG should be happy. posted by neolith on July 17, 2008 at 13:19:30

    One reason budget was a consideration in the cap-coil mix was the need to leave enough for some Home Depot red oak to rebuild from the ground up. And I wanted to hear what an XO upgrade brought to the table before I started on the reframe/rebase. It'll be a strutless wonder with outrigger feet (shown at the link below).
    
    In the meantime, I'm keeping the Erses to see if that does the trick.
    
    Jim
    http://www.geocities.com/jimtranr/index.html
    
    
    

    • Rough concept drawing   (Open in New Window)

    
    

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    • RE: Reframing and rebasing is the next step. - Joe Schmo 17:42:05 07/17/08 (3)
      In Reply to: RE: Reframing and rebasing is the next step. posted by Jim Treanor on July 17, 2008 at 13:39:33

      Jim, I’m glad to hear the Erse is finally working out well. They definitely look good “on paper”, but of course the ears are the final test. Your methodical approach to evaluating each components character in the mix has been very interesting to follow. I’m eager to hear your impressions of the reframe project too. Have fun with it.
      -Joe
      
      They're not that big!
      
      

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      • RE: Reframing and rebasing is the next step. - Jim Treanor 18:45:35 07/17/08 (2)
        In Reply to: RE: Reframing and rebasing is the next step. posted by Joe Schmo on July 17, 2008 at 17:42:05

        Thanks, Joe. The 1.6's are chewing on Elmer Bernstein's film score for The Magnificent Seven (the Phoenix Symphony on a well-engineered Koch CD) as I write this, and Erse and Company are doing a bang-up job with the timpani, bongos, Mexican log drum, et al that permeate much of the work. What catches my ear among other things is the striking improvement in the rendering of attack and decay in space across the frequency spectrum, fostering a far more convincing illusion of "being there." Will be interesting to see how the reframe builds on it.
        
        Jim
        http://www.geocities.com/jimtranr/index.html
        
        
        
        

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        • RE: Xover Upgrade - ACE_Vagi 02:21:10 07/18/08 (1)
          In Reply to: RE: Reframing and rebasing is the next step. posted by Jim Treanor on July 17, 2008 at 18:45:35

          Jim, Great to hear someone is at pretty much that exact same upgrade stage as me with their maggies ;-) I'm just running in my new passive Xover on my 2.6Rs - and it's sounding wonderful so far. I have about 50 hours on it. Building it all in one go I don't have that same level of detail as to exactly what components are contributing what sound improvement as you do, but I did it at the same time as my delam reglue and just wasn't willing to wait to do a bit at a time ;-).
          
          To clear up a couple of things mentioned above. Just with regard to cores - the laminar core will actually only provide a lower saturation flux density than the same sized ferrite core, due to the material difference and the space between the laminations (% core material). What the laminations do provide however is lower core hysteresis due to the minimization of eddy currents in the core, which will reduce distortion. Steel is used for ease of manufacture.
          
          I have converted my coils to North Creek 12AWG air cores for the bass panel series inductors and 12AWG Alphacore foil inductor for the ribbon bypass. Focusing on the bass - These NC Air coils have provided a noticable increase in bass depth as well as increased tightness. The upgrade has massively enhanced clarity & detail throughout, as well as sounstage depth, back to front layering and soundstage width.
          
          I do notice now that there is more panel vibration though at low frequecies which I intend to remedy with some stands and eventually something resembling my 'ultimate maggie upgrade' mentioned in a earlier thread to stiffen up the whole frame.
          
          On the Cap front, for the bass I'm using a 75uF Ansar Polyprop (only single polyprop I could get in that size in the UK) and for the ribbon 33uf - a 30uF Ansar bypassed by a 3uf Jupiter. I'm then using a 2uf Jupiter as the outside bypass (see the 2.6r Xover diagram in my previous thread for details). I'm also using a Mills 12W resistor in the treble Xover.
          
          I'm very interested in your reviews of the different caps, I chose mine mostly based on reviews & price (given that I couldn't try them out) but I'm thinking of trying out others like Duelund copper foils, Mundorf silver oils and Dynamicaps at some stage (If I ever have some spare cash ;-P) I'll keep everyone posted on the results.
          
          BTW - I used Eichmann Cable pods as speaker connections, and they are fantastic!! Great to work with and well built for a very reasonable price - I paid about £17 ($33) per pair (they come in packs of 4). Much cheaper than WBT or Cardas here in the UK.
          
          Congrats on the uprade & cap experimentation, and the great review. I'll be putting up a proper review of my Xover upgrade once it's finished running in & I have done some 'serious' listenning :-) and tear myself away from my system long enough to write it.
          
          
          
          
          
          
          
          

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          • RE: Xover Upgrade - Jim Treanor 13:12:45 07/18/08 (0)
            In Reply to: RE: Xover Upgrade posted by ACE_Vagi on July 18, 2008 at 02:21:10

            Thanks for the clarification on laminar cores.
            
            I can appreciate your desire to get your 2.6's back up and running all at once. I'll be interested in whether, and if, you hear anything change as your caps log in more hours, so looking forward to your review--though, despite appearances to the contrary, it was tough tearing myself away from my listening chair long enough to punch out the keystrokes on mine.
            
            
            Jim
            http://www.geocities.com/jimtranr/index.html
            
            
            
            

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