Experiments with VTF


I've spent the last couple of days experimenting and optimizing the VTF of my cartridge. I wanted to share my obervations. Hopefully this will provide some inspiration to newbies to experiment with this adjustment.

Initially, instead of making very small (~0.01 g) incremental changes, try making some large changes (~0.1 g) in each direction to get an appreciation for the effect VTF has on sound reproduction.

What I found when below optimum is that the sound is very airy (too much depth from the lack of bass), although lean and slightly tinnier in timbre and with lower bass response. You will notice this as you will have greater presence of midrange and highs and less bass.

When above optimum, the airiness decreases, the sound becomes richer in timbre but too thick, with improved bass but slightly less defined and resonant. You will notice this most from a thick, minimally airy (less defined depth)sound.

I would recommend approaching the optimum using 0.05 g increments from a setting that is too low. As you approach optimum, you will find bass to improve and timbre to become more correct and natural and the ariness to lessen but still be there.

When you get close, begin to make 0.01 g increments till you find the perfect balance between airiness/soundstage, dynamics, natural timbre and bass presence and definition.

It is a long and painstaking process but very rewarding. It is amazing just how much 0.01 g can make when you get close.

I would recommend a record that has female vocals, some good bass and lot's of ambience. I mainly used Norah Jones-Come away with me.

With my transfiguration Orpheus, I found the optimum to be around 1.955 - 1.960 g.

Good luck and have fun
aoliviero

Showing 4 responses by nsgarch

I do as Doug suggests: Start heavy and work towards lighter. BTW Doug, someone actually makes a "cartridge warming lamp." I assumed you already had one ;--) If I can I'll find the manufacturer for you. N.
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Newbee, I think folks are unnecessarily concerned about VTF creating significant changes in SRA or VTA. With today's stiffer suspensions and shorter cantilevers, it would take a really large increase in VTF to signficantly compress/deform today's stiff suspensions with the short lever arm of today's cantilevers. I'm so old I can remember watching a Shure cantilever slowly compress into the cartridge body when too much stylus force was applied! Betcha can't do that with a contemporary MC, even at 4 grams!

I also put WAY more stock in setting SRA correctly. One can just forget about the rather nebulous, and really theoretical issue of VTA. I say 'nebulous' because with the many different cantilever lengths, what do you think is the liklihood that the one on your cartridge will match the mechanics of a cutting head? Answer: very remote! And yet that would be the ONLY situation where a match would be possible, if indeed it would matter at all.

That's why I started the thread detailing the (rather tedious) procedure of finding zero SRA for your own stylus. And if it's done using the mid-range of recommended VTF for your cartridge, no amount of future VTF tweaking within that range is going to change your SRA setting to any significant degree (that's a pun, get it? ;--)

BTW, I just discovered a little cartridge conditioning tweak that extends (as opposed to 'increases') the compliance of the suspension: once in awhile, play a SQ quadraphonic record. Their grooves add a left/right twisting motion and you'll like the improved resolution you can hear on your regular LP's. The quadraphonic pressing itself will sound crummy -- just leave the room ;--)
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MIT beat it into me ;--) Everyone knows how hard it is to get into MIT, but only graduates know how hard it is to GET OUT OF MIT !
Doug,

"I'm gonna design a tonearm with a built in heating coil and a thermostat. Should sound great!"

That's exactly what I saw!! Well, it was a tiny little incandescent lamp in a little 'witch's hat' reflector on a little goosneck and it's designed to heat the cart while the arm's in the rest.

You know, come to think of it, the Littlite would be perfect! Too bad about Paul -- score one for 'intelligent design'!