What did you do to your stereo rig today?

Gardenstater

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.

xschop

Got the metric countersinks dialed in to 0.310 heads...

Gardenstater

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

SCompRacer

I made an add on counterweight for my spare tonearm after the years ago putty fix had dried and cracked off. You could say I have the Midas touch.... (A Denon 103r is in that Midas body).

rebelsoul

Just ordered a Denon 103 with sapphire cantaleaver and nude elliptical and ebony body.

SCompRacer

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.

xschop

I still have to machine off 0.005 from the face and add the throat profile. Haven't decided cross-hatch fly cut on mill or simple finish turn on lathe for contrast....






Foam mount mod clears X-over nicely...

VR3

That baffle is... Amazing

Navy_Goat

Added a pair of Trey's diffusers to my 2.3 and 2B last night. This simple addition seems to have brought the stereo image more clearly into focus. Sorry, I do not excel at describing sound. Sounds good to me, I guess that is what counts!

xschop

Thanks Trey, these are my 4th and final Jr's.

Gardenstater

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.

xschop

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.








Profiled the new tweeter bezels today also...

treitz3

Be careful not to over dampen them. It affects the sound greatly. I learned that the hard way.

Tom

VR3

he speaks truths!

xschop

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....

treitz3

Roll off the edges of the baffle if you can. If not? Get a diffuser.

Tom

Gardenstater

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

xschop

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

Yuppers. Sharp edges on a baffle creates unwanted reflections.

Tom

xschop

I've got 2 versions of Trey's anti-diffraction pads I can experiment with.

rebelsoul

Picked up a box to put albums I am going to listen to for the evening.

rebelsoul

$16.99 at Michaels

Gardenstater

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:



Tweeter felt only:



MW and Tweeter Felt:

treitz3

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.

Gardenstater wrote:

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

VR3

Anti diffraction pads are the way to go! 😁😁😁🎉🎉🎉

Gardenstater

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.

Gardenstater

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.

xschop

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'.

treitz3

Finally.....FINALLY got that daggum Auralic Vega G2 to play some music!

I haven't heard it since this past Polkfest at Troy's pad. Well, I did but only was able to extract less than 3 minutes of music out of her after working on it for a collective 24 hours.

I started again today after a good, long cooling down period and while it took me about 2 and half hours of further diagnosis? I now have sound out of her and I'm back in the streaming game.



Tom

55SLA70

Success!! We’ll done!