The importance of azimuth


Not a particularly sexy topic, I know, but I recently had a rather ear-opening experience with my VPI Aries 2/JMW-10/Denon 103D. I been enjoying playing records for hours--sometimes days--on end during the few weeks I've had the new 'table and arm (the cart I've had for years). But after endless tinkering with the VTA (adjustable during play--perfect for neurotics like me), even at the "ideal" setting for any given record, there was an unpleasant edge to the sound. It was almost as if everything was digitally remastered!

Needless to add, this was not exactly what I'd hoped for in a record-playing system, though it *still* sounded leagues better than my digital rig (Sony SCD-1), even with the latter playing SACD (no, it does *not* sound as good as vinyl--not yet, anyway). I added some damping fluid. No audible change.

Then it occurred to me (duh!). I'd only made a token adjustment of azimuth when I'd set up the 'table. It looked straight, the channels were well-separated and balanced, and basically I didn't want to screw around with it.

Big mistake. (I'm sure you were all mouthing those words already.) A loosening of the set screw and a bit of twisting, and...everything looked the same. Stylus descended to record...drum roll...oh...my...God! Voices and instruments beefed up and acquired shape, tape hiss magically appeared (where appropriate), and hard left and right images seemed to float about a foot outside the speakers.

I'm sure there are more scientific ways of setting azimuth, but I'm now in one of those situations where everything sounds so fulfilling of my expecations that I don't want to lose it.

Folks, never forget that in set-up *everything* matters. These are tiny increments of adjustment we're talking about here. Take care with everything and your hardware will reward you with the gorgeous sound we know is inside those records.
bublitchki
Jphii, you are darned right it is worth the money and it would be worth $5-700 today I imagine.....To do this by ear is rough as lots of folks just can't listen to the venue information (they listen to the melody) and get it the same on each side which accomplishes the same thing as this device.....Front surface mirrors are useless as the output of most moving coils is just not the same side to side and usually the cartridge will be slightly canted to one side or the other for equal crosstalk from each channel......
.....the output of most moving coils is just not the same side to side and usually the cartridge will be slightly canted to one side or the other for equal crosstalk from each channel......

This I find a very interesting comment and it explains why, when my preamp is set to mono and using the HIFI test record azimuth check, I could never get what approached silence with the headshell as perfectly perpendicular to the LP as I could get it by eye. When I got it right with the record, the cartridge looked ever so slightly askew. Is this a defect in the cartridge? Will record damage occur with a "canted" cartridge?
4yanx, You will never notice it is off perpendicular and these things are handmade so expect them all to be a bit different.....Lyra uses the body as part of the alignment jig so they are all pretty darned close to correct FWIW.....
The assembly of my Shelter is visibly off-perpendicular relative to the body. Like 4yanx, I've done the best I can getting it perpendicular by eye using a mirror, but I've never achieved silence on the crosstalk tracks either.

Wally's Analog Shop, as referenced by Albert Porter above, measures crosstalk at the speaker terminals. That should better what we can do by ear. $400 including a copy of the Cardas test record. Very tempting. Can anyone think of a reason NOT to buy it (other than the price of course)?
Anyone want to go in and share one? Or buy one and rent it to me for a short spell? :-)