What did you do to your stereo rig today?

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Comments

  • Gardenstater
    Gardenstater Posts: 2,833
    I just saw this from a Polk XT20 Bookshelf. Kind of what I had in mind for a tweeter bezel to provide a waveguide and maybe some time alignment.

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    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • xschop
    xschop Posts: 2,863
    edited April 28
    That black one is a plastic tweeter plate from the Dayton and the new aluminum billet ones will fit both the Dayton and the Morel and will also fit the tweeter cutouts on Polk speakers using the SL5xxx and SL6xxx?

    Let me know if you find the unobtanium status black oxide flat head torx screws I am still looking for :) Do you happen to remember what the thread was on the Peerless? Some were metric and some SAE?

    Yes, either Morel or Dayton plate can be set up on the jig and trimmed down to 3.755 for most older round-plate Polk tweeter cutouts.
    The only advantage the Morels have over the factory Daytons is the cast-alloy faceplate.
    Another caveat is that I prefer the Dayton/Morel dome throat profile even over the RD0's small-angled profile. I'm typing this listening to the 5Bs directly on work bench with billet Dayton plates' rounded throat profile. I can clearly hear the stereo separation, even moreso than when I have the RDO plates installed. With the RDO plates installed I had the cabinets toed-in while always at the work bench.


    I believe I posted the thread size differences in the SL2000 Hack thread. ASE for US peerless and metric for Danish I believe.

    The Dayton/Morels are black oxide Torx M4 x 0.7 x 9mm
  • Gardenstater
    Gardenstater Posts: 2,833
    Found it thanks! The 55141082 had #8-32 magnet screws and the ??140981 had M4 x 0.7. :) So for my 7514xx79 ones I most likely need the metric. Figures lol.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • Gardenstater
    Gardenstater Posts: 2,833
    Very precise. I found the flat head black oxide torx I was looking for. From China of course. Still looking for USA.

    https://www.ebay.com/itm/153856427968?hash=item23d28ec7c0:g:8MEAAOSw3FleY1yo

    0b9ns4lzz5f1.jpg
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • rebelsoul
    rebelsoul Posts: 389
    Just ordered a Denon 103 with sapphire cantaleaver and nude elliptical and ebony body.
  • SCompRacer
    SCompRacer Posts: 7,640
    edited April 28
    rebelsoul wrote: »
    Just ordered a Denon 103 with sapphire cantaleaver and nude elliptical and ebony body.

    Congrats, great cartridge! I nuded and potted my 103r with no fatality. B)
    Make yourself necessary to someone. Ralph Waldo Emerson

    Salk SoundScape 8's * Audio Research Reference 3 * Bottlehead Eros Phono * Park's Audio Budgie SUT * Krell KSA-250 * Harmonic Technology Pro 9+ & Pro 11+ * Signature Series Sonore Music Server w/Deux PS* Twisted Pear Buffalo IIISE Pro ES9038 DAC * Heavy Plinth Lenco L75 Idler Drive * AA MG-1 Linear Air Bearing Arm * AT33PTG/II & Denon 103R * Richard Gray 600S * NHT B-12d subs * GIK Acoustic Treatments * Sennheiser HD650 *

  • VR3
    VR3 Posts: 25,762
    That baffle is... Amazing
    - Not Tom

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
  • xschop
    xschop Posts: 2,863
    Thanks Trey, these are my 4th and final Jr's.
  • Gardenstater
    Gardenstater Posts: 2,833
    xschop wrote: »
    Thanks Trey, these are my 4th and final Jr's.

    I think it is safe to say that you put the Magic(O) into those 5 jrs!

    https://www.magicoaudio.com/enclosures

    MAGICO has spent many years developing an enclosure system that successfully balances the 3 elements that constitute a proper loudspeaker enclosure: stiffness, mass, and internal damping. The graphs here show the spectral decay data across the range of typical enclosure construction methods.

    No singular material can satisfy all of the properties desirable in a loudspeaker enclosure.

    As stiffness increases, moving from MDF to phenolic resin to aluminum, cabinet vibrations are drastically reduced, although a sharpened Q of the resonance results in an audible ring.

    By damping the high Q resonance via elaborate constrained layer damping we have eliminated all energy storage and audible resonance from our enclosure.

    di3dpcy509u3.jpg
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • xschop
    xschop Posts: 2,863
    edited April 29
    I foamed the inner baffles on this build so I went ahead and cut out the original baffle area. I gained about 50 cu. In airspace and will try a couple different port lengths before gluing one on to the inside.
    What I learned from building these, is that Polk's cabinet builders were all over the place or inebriated lol.


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    Profiled the new tweeter bezels today also...

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  • treitz3
    treitz3 Posts: 15,472
    Be careful not to over dampen them. It affects the sound greatly. I learned that the hard way.

    Tom
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~

    ~ I have found excellence ~

    ~ The best way to enjoy digital music reproduction is to never listen to good analogue reproduction ~

  • VR3
    VR3 Posts: 25,762
    he speaks truths!
    - Not Tom

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
  • xschop
    xschop Posts: 2,863
    Hopefully with the extra baffle area removed, the foam doesn't displace the same volume that was removed.
    Sticky dome mounted. I think I like the factory black oxide Torx screw heads to match the MW....

    wnnkl7k68cy1.jpg


  • treitz3
    treitz3 Posts: 15,472
    Roll off the edges of the baffle if you can. If not? Get a diffuser.

    Tom
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~

    ~ I have found excellence ~

    ~ The best way to enjoy digital music reproduction is to never listen to good analogue reproduction ~

  • Gardenstater
    Gardenstater Posts: 2,833
    edited April 30
    I think you should send pics to the CEO of Magico and maybe he will fly you out to the manufacturing plant in CA (perhaps in an electric airplane) for a free tour:

    https://www.soundstageglobal.com/index.php/blogging-on-audio/134-jeff-fritz/961-magico-m9-loudspeakers-no-compromises-allowed

    97lpc9c4irnt.jpg
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • xschop
    xschop Posts: 2,863
    treitz3 wrote: »
    Roll off the edges of the baffle if you can. If not? Get a diffuser.

    Tom

    Are you referring to a tweeter diffuser?
  • treitz3
    treitz3 Posts: 15,472
    Yuppers. Sharp edges on a baffle creates unwanted reflections.

    Tom
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~

    ~ I have found excellence ~

    ~ The best way to enjoy digital music reproduction is to never listen to good analogue reproduction ~

  • xschop
    xschop Posts: 2,863
    edited April 30
    I've got 2 versions of Trey's anti-diffraction pads I can experiment with.
  • rebelsoul
    rebelsoul Posts: 389
    $16.99 at Michaels
  • Gardenstater
    Gardenstater Posts: 2,833
    edited April 30
    xschop wrote: »
    I've got 2 versions of Trey's anti-diffraction pads I can experiment with.

    Let us know what you think. I removed mine and I confirmed that I did not like what I heard so I did some measurements to see, just out of curiosity, if there was any visible difference in freq. response and I must say that despite the dip which I didn't used to have (aging tweets?), it was flatter in the 3kHz + region with both the MW and tweeter felts installed (left speaker only/right channel disconnected). It is mostly an audible thing though. Freq. response curves don't seem to show the whole picture at all. Cleaner, more transparent, more phase aligned and coherent sound could result in a less smooth curve but still sound much better. Just my opinion at this point:

    No felts:

    h6spdw2bf4t2.png

    Tweeter felt only:

    lfddxp5uvnuu.png

    MW and Tweeter Felt:

    hjbxczjwml3c.png



    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • treitz3
    treitz3 Posts: 15,472
    xschop wrote:
    I've got 2 versions of Trey's anti-diffraction pads I can experiment with.

    Each speaker is different, so I can't speak to yours but on my Tylers's? I have the MTM network with the diffusers. That worked better than just the tweeter diffuser.
    It is mostly an audible thing though. Freq. response curves don't seem to show the whole picture at all. Cleaner, more transparent, more phase aligned and coherent sound could result in a less smooth curve but still sound much better.

    I don't do measurements but your observations mimic mine. The sound is much cleaner, the aura surrounding instruments and singers became more palpable, definition of location within the spatial locationality cues became sharper, certain instruments and passages got less "shouty", if you will and the overall presentation became more defined.

    The best way to describe it would be akin to if you were looking at rocks at the bottom of a slow moving stream through window panes and then those panes were removed. It simply improved the definition of what you were looking at and it allowed you to spot more texture on the rocks, observe the minute air bubbles floating by and see slight color variations within the moss that's on the rocks. It's not a night and day difference but it sure does make what you "see" much clearer.

    Tom
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~

    ~ I have found excellence ~

    ~ The best way to enjoy digital music reproduction is to never listen to good analogue reproduction ~

  • VR3
    VR3 Posts: 25,762
    Anti diffraction pads are the way to go! 😁😁😁🎉🎉🎉
    - Not Tom

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
  • Gardenstater
    Gardenstater Posts: 2,833
    It sounded very smooth with the felts removed but all the life had been sucked out. Returning the felts the cymbals had long decay times and I had so much more airiness to the music.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • Gardenstater
    Gardenstater Posts: 2,833
    edited April 30
    Oh, and the combination of the Felts and Heavily Rounded Cabinet Edges (or an Anti-Diffraction Frame) is really the key in my opinion and experience.
    George / NJ

    Polk 7B main speakers, std. mods+ (1979, orig owner)
    Martin Logan Dynamo sub w/6ft 14awg Power Cord
    Crown D150 amp
    Logitech Squeezebox Touch Streamer w/EDO applet
    iFi nano iDSD DAC
    iPurifier3
    iDefender w/ iPower PS
    Custom Steve Wilson 1m UPOCC Interconnect
    iFi Mercury 0.5m OFHC continuous cast copper USB cable
    Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
    Custom Vibration Isolation Speaker Stands and Sub Platform
  • xschop
    xschop Posts: 2,863
    Burning in caps still, will be switching out the Dayton cap on tweeter circuit to Clarity cap and see if I hear any difference. Can't imagine the tweeters sounding better...

    These will also be getting seismic isolators next.

    Power Port or leave well enough alone?
    Even at low listening levels, I can hear low midrange coming from ports, although no 'chuffing'.

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