Turntable leveling


Pardon the possible obtuseness of the question, but - in the opinion of forum readers - how important to sound quality, LP and stylus wear is having my turntable precisely level? Try as I might, I can't get it <2 degrees from absolutely horizontal measuring with the Levlx iOS app though it looks good with a bubble gauge. I've looked online and I can't find a consensus opinion on this matter though I know the more level the better.
Thanks in advance,Keith
kacomess

Showing 2 responses by elliottbnewcombjr

I leave a small bubble level on the tt deck, always verifying level.

Bubble Levels can be defective. I have several various plastic ones, they all agree with each other (and they agree with my more professional levels I double check with).

I just bought a nicer stainless steel one with blue fluid to look good with McIntosh blue meters for an amplifier stand I will be selling on eBay. The new one is off a few degrees, what a shame, perhaps a tiny imperfection inside that prevents the bubble from centering. My quest for blue fluid is not done, the first one said blue, showed blue, came green. 
It is imperative to get the tt level PRIOR to:

1. arm height adjustment.

a. sufficient clearance when lifted, enough space when lifted to brush/liquid clean stylus and/or clean dust off anti-static brush if used. Back to front of course. Once set, I do not remove my headshell from the arm to clean it, it stays 'perfect' and gets very carefully cleaned in place.

b. arm floating parallel at zero tracking weight, zero anti-skating.

c. height for proper vertical tracking angle into the groove while lowered/playing.

2. cartidge alignments (forward/back and left/right in the headshell to achieve best parallel alignment at the 2 points throughout the arc on the alignment gauge. Critically tedious, and things move as you tighten, double check, do it again, again. Check after a few months, proves you got it tight enough.

3. view from front: perfectly straight down into the groove (tiny shims in the headshell may be required, they are the worst, but, nirvana awaits). If you add shims, you gotta set the 2 points of alignment again!

I use a thin mirror on the platter. Lower the stylus, nose down, eyeball straight at it: any slight angle will be more easily seen.

4. tracking weight (zero anti-skating for this).  Shure anti-static brush: brush up when setting desired tracking force. Add 1/2 gram when calibrating, to compensate for the brush's upward force in use, i.e. 1.75 without brush = 1.25 with brush in use. Then, set anti-skating for 1.25 to match the effective tracking force of 1.25   

5. anti-skating equal to tracking weight. This is VERY important, and, assuming prior adjustments are correct, needs to be refined by ear. Test records, your most familiar recordings. Proper balance left/right separation, center image is all critical to this, stylus 'free floating' in the center of the groove, ready to properly respond to all vertical/left/right input.

Note: I use my McIntosh 'mode' switch, go from Stereo to Stereo Reverse, you know for sure if anything changes. Mono to left, mono to right, .... it is one of my favorite McIntosh features.