RB300 maintainance...


I noticed that on the most inner grooves especially on the extra long-playing records where the grooves come as close as possible to the record label that the sound greatly degrades and becomes too mushy and undetailed. It happens approximately 1.6" apart from record label. Before that the degradation seems to be unaudiable. The very beginning of the playable surface seems to be even too bright, but that's I believe an issue of a load impedance and can be easily resolved.
I checked the cartridge allignement and it seems to be at its maximum precision.
I assume that tonearm moves heavier towards the inner grooves and needs some attention.
Please help me out. My analogue setup is J.A.Michell GyroSE/Incognito-RB300/Lyra Helikon(Benz M.09 as backing up)

THANKS!
128x128marakanetz
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I have, in fact, listened to master tapes and done a direct A/B comparison with the same recordings on vinyl as Pbb asks. I don't want to fuss over playback software because it really is the music that counts but let me expand. This opportunity was provided to a few lucky folks in Omaha at The Sound Environment and was (as you might guess) sponsored by Linn. Since I already had an LP12 and accidentally dropped by I paid careful attention to the way things were set up. The huge tape machine was connected to the preamplifier just like you would do at home. The turntable was normally connected to the same preamplifier. I was trying to determine the legitimacy of the comparison and found this to be an honest attempt with no apparent tom-foolery. I'm certainly not a reviewer nor am I an audio technical person but I was blessed with very good hearing and a deep love for good music. I will try to give my best shot at describing what I heard under very close to perfect conditions.

The master tape was dead silent between passages. The LP12 provided a slight sense of pressure between tracks. This was at a very high volume level. The tape allowed detail, overtones and recording room acoustics that actually made the listening room disappear. I have never heard anything that realistic since. The LP12 came so close to recreating the tape that I vividly recall chills running up and down my spine. To be honest, the vinyl source confined the listener to the physical confines of the listening room. It seemed to me that perhaps some of the recording room acoustics were lost in the vinyl playback but let me say that the difference was very, very small.

While I admittedly know very little about electronics I do know quite a bit about mechanics. If the lathe cutter head is fed all the information while making a master disc, then all the information is in the groove. Extracting all that information is difficult and costly and is perhaps impossible. At least it is there waiting for someone to conquer the extraction. The same cannot be said in the digital domain as yet. A thousand years from now it will still be impossible to extract all of the original recording room sounds from early cd releases. The information is simply not there. The same criticism cannot be leveled against vinyl examples made at the same time.

Please don't take this as a condemnation of the digital format. At this point in time digital can be exceptionally good and it will only get better. I believe digital will one day become the best software format. For now and well into the future their is room for both formats in this hoby.

I have some really great examples of the analog recording process as it has evolved. First patented in 1892, the Edison gold molded records were cylinders. The original recording was on wire. The first commercial stereo recordings were made by Bell Labs in 1931. Analog has evolved and so will digital. It's doubtful that the shiny little discs used today will still be the software of tomorrow. When the mechanics of spinning the cd and the movement of the laser are found to be the biggest source of audible degradation, a new software format will emerge.

Thanks to Gary and Cindy at The Audio Gallery in Lake Oswego, Oregon I have heard a CDP that sounds perhaps better than my turntable. Problem is, it won't play any of my records. So, after over 35 years of accumulating vinyl I have embraced both formats. If something new that I like is available on vinyl I buy that. If it isn't, I by the CD. I don't feel snobbish about being a vinyl junky but I bristle when insults are lobbed at my favorite playback medium. It's like telling me my wife is ugly. That has nothing to do with whether she is a good wife. Marakanetz has a mechanical problem with a turntable. Once the problem is resolved, and while listening to the entire side of an lp, there will be no audible difference from the first note to the last.

Happy listening,
Patrick
I've made the test proposed by Lugnut and I noticed that on perfectly leveled TT the tonearm comes always back even with anti-skate set to zero.
On my opinion it's azimuth mis-adjustment. The only way to bring it to the appropriate level is to use the file to cut off a-little one of the plastic spacer that is a partof the armboard. While the TT is leveled perfectly the armboard isn't.
Marakanetz,

Understand, I have never actually seen your brand of turntable in person but looked at several photos on the net. Since it is a suspension turntable I make the assumption that the platter and the armboard are somehow suspended together. That would mean that the platter and the armboard are level on the same plane. You mentioned that you have perfectly leveled the turntable. If you place a spirit level on the platter and it shows level, does it also show level on the armboard?

Please post your progress on this thread. Good luck and...

Happy listening,
Patrick
Patrick it's yes and no. Theoretically it's yes and practically the level isn't matched on the armboard(very-sligtly off) due to probably the slight difference between one of the three cylindrical plastic 1/2" spacers that mounted on the plinth first and then the armboard(sooner or later I'll probably get the fully adjustable tonearm like Act5 or SMEIV). So once I start(I've even placed two bubble levels onto plinth and the armboard)leveling the armboard the plinth is completely off the level. Currently I've found the "average" balance between the armboard and the plinth which took care of some inner-groove misreading. The more I'm dealing with Rega the more I realize that it's not the way to go.