Bent Cant, Can't get azimuth right. Does it matter


Hello again,

I just got a new Benz Micro Gold for my scout and jmw-9 arm. When it arrived, the cantilever was bent slightly over to the left. I aligned using the vpi jig.
With the HI-FI news test record, I can track all the test tracks except the torture track 9. Everything sounds really good, and I am corresponding with Yip to get a mint lp sent out to me soon.

My problem is the azimuth set-up, track 5 side 2. Because the cartilever is bent slightly, in order to get the stylus perpendicular to the record I would have to tilt inward about 20 degrees! On the azimuth track, I can't get the output of the channels equal otherwise, but in all the tracking test tracks the output is identical?

My question is:

If the cartridge is tracking well (excellent) and I don't hear any distortion in my music, is having the azimuth perfect going to make a big audible difference?
I can always send it back to the dealer?

I added a photo of the cartridge to my system ( the photos need to be updated )

Any thoughts?
hanaleimike

Showing 5 responses by dertonarm

With any cartridge featuring a "bent" or "off-line" cantilever one should always remember that it is the cantilever (and of course ultimately the polished area of the stylus in position towards the grooved walls of the record...) that has to be aligned - NOT the cartridge body.
In an ideal world the outer lines of the cartridge body are absolutely parallel (or 90 degrees....) to the cantilever and can help to align precisely - but they are only an optical support for alignment.
Its never the carts body that has to be aligned.
Tketcham, there are two parameters in a given MC cartridge that need to be aligned when mounted in a given tonearm:

1) the position of the stylus' polished area in relation to the cutting angle of the groove walls.

2) the position of the coils (attached to the cantilever) in the designed center of the magnet field.

The first is a matter of azimuth, VTA and geometry of the given tonearm.
This parameter most certainly varies with different records (different cutting angles, different record thickness) as the groove-compliant VTA is depending on the record under track and the angle that record's matrix was cut with.

The second point is a matter of VTF (and to some degree and in some cartridges a matter of "break-in" - i.e.: of time....).
However- there is only ONE optimal VTF when the cantilever (and thus the coils... ) is positioned in the absolute center of the magnetic field.
It may ever so slightly vary with time (suspension giving slowly in or ambient temperature varies), but it is constant during the "healthy live-span" of a cartridge and under constant ambience conditions.
There may be 2-4 positions of a cantilever inside a given cartridge where one may thinks the alignment is "o.k." - but in reality as in theory there is only one optimal position.
D.
Hi Tom, the situation you do describe is a cartridge which should always and right away be returned to the manufacturer - its certainly defective.
Which brings us back to Raul and the fact that we - the customer - do get what we accept.
If we accept less than perfect mechanical craftsmanship, than we deserve no better - and will get no better.
Any cartridge - for any price - should be mechanically perfect and geometrical correct to its design parameters to start with.
No excuse - no exceptions (no matter how much hype around its 120+ year old designer (coming from 20+ generations of ancient warriors.....) who only makes 12 samples a year and only at full moon and with wire delivered by real Trolls........).
Cheers,
D.
Hi Mike, in general: in the very first 1-20 hours of a new modern cartridge you will notice that the sounds does change literally if not by the minute, but by the hour. The suspension velocity needs to adapt to the ambient conditions and needs these initial "break-in" to adjust itself to its specs.
It is always good, to set the initial VTF at the upper maximum of the recommended range. I would stick to the 2.2 grams and just play and wait till you have at least 20-30 hours of actual playing on the cart.
No need to fine tune the VTF now, - nor would it show it.
Get past the initial break-in and do adjust the "sweet-spot VTF" when the cartridge is actual awake (read: suspension has reached specified velocity).
Do ever so little decrease the VTF then till you find the spot with the most open, dynamic sound, while still not lacking authority and weight.
As we can't really look into the cartridge with a microscope while playing, the fine-tuning of the VTF too is a matter of ears, experience and skill.
Move slowly, precise and only after you are sure the break-in period is past you.
Please make sure the tonearm is absolutely in zero-balance before setting any VTF.
Enjoy,
D.
If the run-out groove is smooth-ended, you won't have any trouble.
In any case, every cartridge worth the name has to survive any run-out groove without any damage at all.
However due to lack of modulation, the run-out groove doesn't help at all to speed up the break-in procedure.
So, no break-in while you sleep.