Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required. There are many reviews of audio hardware and expert members to help answer your questions.
Click here to have your audio equipment measured for free!
the purpose remains the music if it is not heard what is the point? ;-)
(on very demanding music and trained and demanding listeners for example... for many factual reasons, the piano often comes back ;-))
the purpose remains the music if it is not heard what is the point? ;-)
(on very demanding music and trained and demanding listeners for example... for many factual reasons, the piano often comes back ;-))
Well, it's always a good having dynamic VTA of 18-20° and a SRA of 90-92°. But the world is not getting it down to those figures, except perhaps for AT and a few others. If you take the Shure/JICO at around 30° VTA and 94-95° SRA. It might be better getting it to 26° and 90-91° with shimming? Or not? I will get shimming experiment done more systematically soon. The closer to the correct VTA, the lesser possibility to get audible problems in music reproduction. In theory at least.
AnalogMagik V2 upgrade is on the way, The dealer had good offer since he is -according to rumours-not taking in more… lucky me, yet another set of test records and gear to the collection of “nice to have things”.
I do not expect it to change my setup much tho, so basically for research purpose..
This is the shim I want to try today (three cut shims from playing cards). One problem is the cables behind, which may go to low (I think they did on my previous experiment yesterday; I bent the green cable a bit up today as well).
This is a write up of the Analog Magik Cartridge Calibration Software package. I'll review the package as a whole so you can determine if purchasing...
www.superbestaudiofriends.org
I pretty much have everything dialed in by other test records, so using AM in addition will be just for convenience/curiosity … especially Zenith..
Had a quick pass through the tracks. and found that my setup was OK. My main motivation was to get the Zeniths check by using this trick
But since my VTA results were 2-3% max 4% IMD which is good I did not change VTA today. The VTA track is NOT vertically modulated as I hoped/expected, it is in stereo... strange choice..
So later I may upgrade to V2 the have other special Zenith tracks..and updated records.
What is different compared to other records/methods is THD vs VTF and Anti-skate. Both parameters checked out OK in my case.
0.Records are pristine with absolutely no wobbles7warps or imperfections, RIAA implementaion on all tracks it seems, supposed to tim RIAA when recording
1. Speed 3150 OK quality ,but not reaching my top 2 3150hz records. I get WOW at best 0.07% while my best record is 0.03 many records are 0.1+%.. so not bad
2. Azimuth crosstalk -27/32 vs 31/32 ortfon and 37/37 Tohiba that my PU was set up with. 25/31 on my ShureV15-IV Jico SAS B.
3. VTA, 2-4%IMD seems OK on my OC9. Jico SAS on V15IV is 7%, probably due to 30 degree VTA...
4. Anti-skate set for equal channel distortion: mine was perfectly balanced 0.2/0.2% on OC9 and 0.3 on Jico/Shure increasing at higher levelst t0 1.5% but stile eqial on both channelse so probably fine
5. Loading: pink noise for frequency response, similar quality as other PN tracks … 0-150db scale is kind of flattering ....
I used the recommended ART sound card on a new W11 MSI Modern laptop, I got hangups and freeze if I ran other apps , and on battery.
3th Gen Intel(R) Core(TM) i5-1335U 1.30 GHz
8.00 GB (7.73 GB usable)
Skipping the ART soundcard and using cabled power and Parks Audio Puffin directly with Toslink-USB connection from HifiMe to PC worked fine without any hickups.
1. Speed View attachment 416789
2. Azimuth tilted compered with my chosen reference Toshiba 37/37 and Ortofon slighly off , who knows which one is correct,,,
3.VTA 60hz 7000Hz intermodulation track stereo Shure V15 gives 7-8% while AT OC9MLii gives 2-4% View attachment 416796
4. Antiskating, standard 315Hz track increasing level I get balanced results that are supposedly good, OC9 lower than Shure/Jico thd% View attachment 416798
5.Loadin g=frequency respnonse, too wide scale I think.. her mey Shure which is very flat View attachment 416801
In REW it looks like this on OC9 View attachment 416802
6. VTF 300 and 7000Hz tones and distortion evaluation, I got no effect on distortion when varying VTF View attachment 416804
7. Gain Noise floor evaluation, I got this at 39db Gain on MM. Nice balance on this cart 0.1db. I think 30db noise floor means 50db noisefloor at 1khz View attachment 416805
8. Intermodulation test 60/500HZ to revieal vibration?, Numbers go up if i bump the TT... her is Denon DP-51F which is not very inert... View attachment 416806
9. Resonance test lateral and vertical, but range is 7.5-35Hz should go down to 5 at least to be useful... My Denoen 51F has electronic arm damping and hides resonances well
Just an update, the 45rpm record from AnalogMagik has a stunningly well centered and good 3150 track. The wow peak in NAK T-100 is dead stable and not wavering at all..
Running at 45 RPM the wow peak is 0.05%, running the 45 record om 33.33 gives 0.04% wow peak in the FFT diagram , WOW this is good.
Good idea JP, does not look so good then....hmm 0.06 on NAK T-100 is usually good, I wonder hat i going on
6Hz/ DIV
3HZ/div compered with one of my best records..wow 0.035 same turntable, but AM track is after oil service.. need to pull out the QR2010 ..for a check.checked ok
I Apologize for the temporary misplaced exitement..... The AM record has a regular node/valley every 45 degrees , RECORD OR OR MY TT ON 45RPM?.. Still a fairly good record, just not the best.
below is todays QR2010 on Denon 51F, B&K record QR2010 is still superior
The polar plot of the AM 33 rpm record goes like this on Michell Gyro SE and Denon 51F.
Yes but it's also showing once-per-rev eccentricity as a bit more than double those, which looks odd, unless they're weighting it. Just want to see the FM demodulated spectrum with something like MI.
Yes but it's also showing once-per-rev eccentricity as a bit more than double those, which looks odd, unless they're weighting it. Just want to see the FM demodulated spectrum with something like MI.