End of Record Distortion

Jea48,
Is that static sound worse in the left channel? If so, and assuming that cleaning does not help, I'd suspect a pressing flaw. That sound can be caused by the vinyl not flowing fully down into the L channel groove modulations, typically because the temp was too low when they started pressing that copy. It tends to happen on the L channel because that is the inner groove wall. The molten vinyl is pressed from the center outward. If it's not hot enough to flow smoothly it can skip over part of the downward slope as it moves past the groove and leave a gap.

Re-aligning your cartridge may or may not help. It depends on whether the problem is caused by poor groove tracing or by stylus/groove mis-alignment.

Try increasing VTF a bit. This might help improve groove tracing.

The adjustments most likely to help with stylus/groove alignment are overhang and zenith. Overhang is adjusted by sliding the cartridge forward or back in the headshell. Zenith is adjusted by rotating the cartridge clockwise or counter-clockwise in the headshell. As you can imagine, changing one of these often changes the other.

The tool you need for both of these adjustments is a cartridge alignment protractor. There are several good ones, but which one is best depends on the geometry of your tonearm. I'm unfamiliar with your TT/arm so telling you which protractor I like would be fairly meaningless. In general, if your arm is compatible, a two-point alignment will reduce end-of-side distortion better than a one-point alignment. In every case, aligning the cantilever should produce better results than just aligning the cartridge body. This argues for a mirrored protractor like the TurnTableBasics or Wally Tractor.

However, alignment and adjustment may not be enough. Some cartridges won't trace inner grooves cleanly. Groove modulations become tighter as the groove spirals inward, so it becomes progressively more difficult for the stylus and cantilever to trace them. Alto and soprano vocals, massed violins and "pure" instruments like recorders are particularly revealing of this problem.

IME low-compliance cartridges with conical or elliptical styli (like many Denons) do not trace as well as mid-compliance cartridges with line contact styli. I had insoluble end-of-side distortions with two Shelters. Neither of my ZYX cartridges has those problems.

Hi Paul,

AS affects groove tracing of course, but all it does is alter the balance of stylus pressure between the two groove walls. If the distortion is worse on one channel than the other then AS would be the first thing to try. I didn't get that impression from Thinkat's post so that's why I didn't mention it.

There's no harm in trying of course, especially if AS is as easy to adjust on the DP-59L as it is on most arms. If the distortion is worse on the L channel, reduce AS. If it's worse on the R channel, increase AS.

Damping the tonearm could certainly help. If the armtube is resonant controlling it is essential, if you can find a way that works. People have tried all kinds of arm wraps on all sorts of arms, often to good effect. This increases the arm's effective mass of course, so there's a possible downside in terms of warp tracking and/or arm/cartridge matching. Nothing's easy in this stupid relic of a playback system that we all love too much!

What is the Q-Dampener? I don't know these tables at all.

Lubricating the bearing from time to time seems sensible, perhaps even vital depending on the bearing design. I rather doubt it would affect end of side distortion though. A badly under-lubricated bearing might make the table more vulnerable to stylus drag. That would be most audible on outer grooves.

BTW, since you have one of these tables can you recommend a compatible two-point alignment protractor? He definitely needs to check his cartridge alignment.

Someone just posted on VA that changing mats and/or clamps on his MMF 5 resulted in changing levels of inner groove distortion.

I expect that the combination which sounded best did so because it reduced intra-vinyl resonances best. This in turn gave the stylus a quieter environment, which allowed it to trace those difficult grooves more cleanly.

No idea which clamps/mats work best with these Denons, but that's another avenue worth exploring.