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Post by palace on Aug 22, 2024 19:45:45 GMT
If the Auvas have a damping effect on the supported equipment like Black Ravioli, and I suspect that they do, then more Auva will provide more damping. You have to keep a fairly good load on them, so that helps determine the optimum number. MartinT you make a valid point they do damp by allowing vibrating micro particles in what Stack Audio call an Auva chamber by converting vibrations even small ones into heat following the laws of physics in that energy cannot be destroyed only converted. Auva EQ's have a single Auva chamber, Stack Audio say "Hi-Fi electronics benefit from being de-coupled from the stand or shelf that they sit on" their "Custom Silicon Absorber foot fitted to absorb high levels of external vibration". so it could easily be that more than 3 or 4 could be needed to be effective but more expense. Stack Audio say"loudspeakers should be positioned precisely and held rigidly". their various Auva 50's 70's & 100's increase in their mm diameters and number of Auva chambers either felt or spikes I do not like spikes so I elected for felt. I had allowed the Auva EQ's micro particles to settle before fitting the Auvq 70's & Auva 100's. stackaudio.co.uk/auvaeq/?gad_source=1&gclid=Cj0KCQjww5u2BhDeARIsALBuLnNtwJeIEQEcKs5ifnDzVV0B8v5fdoo3Pxu3h8CQHcEgsVN5EVpDn_8aArf6EALw_wcB
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Post by palace on Aug 29, 2024 14:59:32 GMT
This series of posts (blog) of mine was started when Mark Manwaring-White added a SUT Modification to my Croft phono stage for a Hana ML. Expanded with the help of contributors this forum. When I put the Auva 70'S on to the OTA Quad 57's & OTA Rupert stands I had 8 x Auva 50's, so I put them under the Croft phono stage & the CD4se CD player the effect was not as noticeable as the the Auva NO.1 EQ's under my Ming da MC7R modified by Mark Manwaring-White as was my Rogue Atlas Magnum which sits on Auva No.2 EQ's. I read the Stack Audio promotional literature again reproduced as follows "The rigid machined aluminium shell of the AUVA EQ is designed to sit underneath the piece of Hi-Fi equipment in direct contact with the case. The silicone absorber sits on the hi-fi shelf or rack. As such, the case of the Hi-Fi equipment is directly coupled with the AUVA chamber of the EQ but de-couple from the Hi-Fi shelf via the CSA suspension". My thought process was simple something soft & flexible under the Auva 50's after a internet binge Sorbothane pads from SRM I have used their RCM cleaning brush on my LP's when cleaning since my family bought me a Okki Nokki RCM for my 65th so 10 years. Today I removed the OEM feet drilled out the existing holes to 8.5 mm to take the M8 adapters (M8 studding) used for fixing Auvas to speakers. One disc underneath one on top of the Auva 50's to lock the studding & one in the Croft to lock in place, the adapters are non magnetic stainless steel as are the discs, a 25 mm disc of Sorbothane 4 mm thick using double sided tape stuck to the felt under the Auva 50'S So half an hour later listening to Vinyl , Melanie plucking her guitar I heard her nails on the strings never heard that before, then listening to Simon & Garfunkel Parsley Sage Rosemary & Thyme first track Scarborough Fair their voices cleaner easy to differentiate between the two, there has always been noticeable sibilance on this early LP bought soon after release I put a scratch on side 2 this LP sounds better than the later spare I bought with an extra track, the sibilance had almost disappeared, the last track Silent Night was so clean & clear S & G's voices so gentle then from the right speaker the 7 O'Clock News voiced by Charlie O'Donnell was audible sooner & fixed & isolated in a mono space. As it happens O'Donnell was a DJ not a news reader. It is clear to me that I must investigate more Auva EQ's under my Caiman DAC & it's MCRU/Longdog designed LPSU. MartinT thank you repeated what failed with postimage earlier.
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Post by MartinT on Aug 29, 2024 15:38:43 GMT
If you could re-post the images using the Insert Image button and just the URL for the image, they should work.
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Post by palace on Aug 30, 2024 14:41:37 GMT
To save delving through this thread a brief resume. After my eliminating as much EMI/EFI from the system with copper foil shielding. I have fitted Stack Audio Auva 100's to my OTA Quad 57 speakers with stunning results. I have also fitted Auva EQ's to pre & power amp. With Auva 50's modified with Sorbothane under the Croft phono stage with SUT's fitted by my dear friend Mark Manwaring-White (Malvern Audio Research).
Today listening to Sing When You're Winning vinyl LP Robbie Williams the modded Auva 50's are responsible in conjunction with the Auva 100's for the increase in clarity with deeper bass & a sexy hint in the voices of Nicole Kidman & The never less than superb Jane Horrocks & now a very real sounding Sinatra on track 4 "It Was a Good Year"
Rubber Soul The Beatles. Vinyl LP. This album bought as a Christmas Present 1965. I have listened to as much as any other album I have both at my/our flat & elsewhere though not recently. Today it's a different album, after installing Stack Audio Auvas The guitar plucking/picking is now so precise the harmonies the voices are clearer & more distinct an unnoticed muddle has gone. In places what I thought was Ringo hitting a wood block is in fact a cowbell. George Harrison playing acoustic guitar & sitar on Norwegian Wood the notes stop & start instantly, bass guitar underpins in a way I had not noticed before.
This was a surprise I never expected & yes, as before with the album spinning at exactly 33.3rpm it sounds more relaxed almost slower intricacies so easily resolve. As the micro particles settle may be there is more to come.
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Post by MartinT on Aug 30, 2024 19:56:00 GMT
Today listening to S wing When You're Winning That is a very well produced album.
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Post by palace on Sept 3, 2024 16:29:51 GMT
At some point I am going to drive to Ming Towers in Malvern (Malvern Audio Research). I drive because I do not trust couriers plus the turnaround is quicker, I also get to see my dear friend & I can hear the result in Mark's demo system.
My MC7R preamp much modified by Mark Manwaring-White has developed a problem in so much that the 4 way selector switch occasionally goes silent, select any of the 4 inputs & nothing comes out flick it backwards & forwards a few times resolves the problem, I have cleaned the switch & treated with Deoxit , logic dictates, change it, as it will not improve, Mark agrees & will fit a new selector switch he also suggested whilst it is open on the bench fitting a much higher quality volume control than the fitted Alps Blue, the one he uses in his Audio Detail equipment.
When my son has a day off that fits in with Mark's schedule, since I like to have a co-pilot these days on a longish journey, Malvern is a 360 plus mile round trip including collecting my son, just to be safe now I'm 75. As a police officer I saw some unfortunate results of those being blase, I was taught to be careful.
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Post by MartinT on Sept 3, 2024 16:44:53 GMT
I like Malvern, my in-laws live there (Malvern Wells) and my late wife's ashes are up in the hills.
Lovely area to stay and walk around.
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Post by palace on Sept 3, 2024 17:03:15 GMT
I like Malvern, my in-laws live there (Malvern Wells) and my late wife's ashes are up in the hills. Lovely area to stay and walk around. I agree there are some exquisite paths Mark lives at the base of a big hill, his garden rises from the house & the land gets' steeper, though my knees preclude to much walking, the vistas are stunning a beautiful unspoilt place to have one's ashes scattered...
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Post by palace on Sept 5, 2024 11:46:47 GMT
I have just put 3 x Auva No1's under my Caiman DAC & 3x Auva No1's under the MCRU/Long dog designed LPSU ditto under my Virgin box & likewise under my Sony BDP 6700 DVD player...
Listening to Reggae numbers from a Virgin box BBC recording lower bass is fuller, snare drums have a snap.
On i'm in love with a man nearly twice my age Shabba Ranks & Kristal a greater pizzazz I'm surprised Krystal wasn't a bigger star.
YouTube I just called to say I love you Stevie Wonder so much fuller the electronic voice section actually makes sense now.
YouTube Rio After Dark the bird song is so sharp does not hang on it has a sharp cut off, flute notes clear clean & sweet & as is Anna C's voice.
YouTube Crossroads (American Pie)Don McLean piano is so real McLeans voice softer & again slower/more relaxed less in the way...
YouTube Walk on the Wild Side Herbie Flowers opening double tracked bass notes were good now they are lower again sounds more relaxed the little background guitar notes are easier to pick out. Lou Reed's voice intonation works perfectly.
YouTube on numerous classical pieces the reverb of bowed double bass strings are richer & fuller other instruments as on Miriam Margolyes narrating Peter & the Wolf played by the Adelaide SO. are clearly in their allotted sections within the soundstage.
These are my initial thoughts the sound has grown more body & has not the slightest fatiguing element experience has taught me that Auvas improve as the micro particles settle.
Trying to pin down the myriad of minuscule elements is potentially a very long task, the cumulative improvements are many, rather than defining them at this point I just want to listen to music.
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Post by palace on Sept 5, 2024 14:10:38 GMT
I was a little rushed earlier re the Auva EQ's.
I have just got back from my doctors surgery for an inoculation with RSV vaccine, a virus lung infection apparently on the rise particularly in the elderly.
With the system back on, including the Sony BDP 6700 DVD player, firstly playing my 1980's Mikado DVD the picture is sharper! designs on elaborate costumes more visible; sitting here I realise that in crowd scenes the scale of the chorus is more apparent voices are more impressively real & with a feeling of space. I am also hearing what I think are the stage boards resonating in spoken sections not just the foot fall as before. The tenor voice of Clive Revel (oft a villain in the man from UNCLE) very emotive with a surprising quality of tone not heard before. The voices of the bass, baritone & contralto, sopranos et al are all improved...
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Post by palace on Sept 6, 2024 9:01:30 GMT
To quote the observation of someone on another forum "‘Noise’ is often translated into the picture as it has no where else to go and makes edging fuzzy on lettering as an example."
Last night with the system off whilst watching TV with my wife, I saw the TV picture had improved, on adverts I could read writing on products/items in the background as stated above. Of course duh! the 3 Auva EQ's under the Virgin box do not just work when I am playing HD recordings they work effectively at all times so just as I commented on, about the 3 Auva EQ's under the Sony BDP 6700 DVD player, sharpened the picture likewise those under the Virgin box are doing the same.
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Post by palace on Sept 9, 2024 12:04:32 GMT
The Auva No.1 EQ's under the Sony DVD player, Virgin HD Box & Caiman SEG 50 DAC & associated MCRU/Longdog linear PSU joining the other Auva EQ'S & Auva 100's under the OTA Quad 57's on OTA Rupert stands. These new arrivals have had a few days for the micro particles in their Auva chambers to settle.
I don't quite know quite how, the clarity of the sound produced by my system has improved exponentially as has the soundstage which has both widened & deepened as has the ability to find those micro details in the less congested recording, treble & mids more insightful, bass is multi layered where applicable, this is has left me both delighted & conflicted.
Listening to recordings on the Virgin box & then switching it off & listening to the same piece ie Stir it Up Bob Marley on The Old Grey Whistle Test the YouTube rendition is so much better far more detail, deeper bass sharper guitars/drums & the intonation & timbre of the backing & Marley's voice is also different, better sounds just appearing from inky black backgrounds on other recordings. I did connect the TV & Virgin Hub together with a UGreen CAT 7 cable a couple of Ferrites were added one at a time then listening to the cable after reading about a "choke" cable offering improvements.
The Virgin box was previously ok/good in comparison. Now the the differences between sources is now so clear, Phono still rules for me, CD is very good as is YouTube mostly, DVD is good as is the Tuner & so is my cassette player the gap between the Virgin box sound & the aforesaid is a virtual chasm now on 90% of the Virgin recordings.
All in all the Auva's under virtually everything has proved to be a revelation I can remember the system after my successful copper foil exploits to remove/shield against EMI/RFI that was a big improvement, using the Auva 100's was another big improvement, now fitting Auva EQ's under most of my electronics apparently feed the OTA Quads/Rupert stands with a cleaner signal that has been a great success, the music now has effortless scale depth & an element of magic that I did not know was missing. What I hear now is really quite different & preferable to what was available to me at the beginning of the summer.
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Post by palace on Sept 12, 2024 13:33:19 GMT
I borrowed an idea from the Fynne Audio Super Trax super tweeter. Using a vertical U shape copper divider covered in insulating tape in the mouth of the horn on top of my OTA Quad 57's though vertical rather than horizontal it worked, not so neat as the Fynne I proved the concept. I fixed a stainless steel tube to the top of the horn box, then bent a brass rod cut to length with a 35mm brass disc shaped in to a shallow V mimicking the angles of the horn, the rod using JB Weld was affixed in to the V then another 35mm disc affixed over the other, then faced with a disc of flexible vinyl, even satin brass looked wrong to me. This method allowed me to move the what Fyne seem to call an Iso Flare & I call a diffuser, in & out to more precisely stop the Batpure tweeter beaming but retaining all of the other benefits of a super tweeter. I am very pleased with the result.
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