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 2 responses by aoliviero

Folks,

Couple more things:

1) Material with piano is very good and included in my Norah Jobnes. this seems to be a good indication of timbre.

2) There is no ultimate "perfect" setting. As you get close to optimum, you'll need to make tradeoffs between upper end extension and bass response.

Gregm,

I started with an SRA of about +1.5 degrees. A parallel tonearm with the Orpheus provides about 1.2 degree SRA.

Doug,

Good to hear about your method. I had a little difficulty trying to figure out the mistracking point. I don't know if this would be close to the minimum recommended value. Anyway, with my cartridge, I think i'm higher than 0.04 grams above mistracking. this range would probably be higher for higher compliance cartridges.

Andrew
Newbee,

In trials, I did not compensate SRA when changing VTF. It would be difficult to do this precisely. As well, I always thought that changes to VTF were more pronounced than large changes in SRA. I agree that azimuth has a big impact as well. Unfortunetly with my arm, it's difficult to make changes in azimuth in a measureable way. Do you know if the Graham offers this option?