Ortofon MC A90 Cartridge VTF


I just spent the weekend at mikelavigne's where we did a comparison with three turntables all using the same Ortofon MC A90 cartridges. We had the cartridges setup at the recommended VTF and they did not all have the same amount of break-in time on them. I decided to see what would happen when we lightened the cartridges up.

We started on the first table and the weight was about 2.25. We lessened the weight until I thought that the sound really locked in. By the time we were done on the first turntable, the VTF was at around 1.56. When we did the second table we got the weight all the way down to 1.92. On the third table it ended up best at about 2.01.

All parties (myself, Mike and Steve) agreed that lightening up the carts really opened things up quite a bit without loss of bass. The inner detail and delicacy inreased as did speed and dynamics.

I called Ortofon and am awaiting a response but I was wondering if those of you who own this cartridge have gone outside the recommended range and if you could share your experiences.

There is more to read about this if you want under mikelavigne's system thread.
jtinn

Showing 3 responses by dante1

I mistakenly set VTF at 1.8g when I switched carts on my Ortofon AS 309S arm. Imagine my surprise when the A90 opened up gloriously and gave deeper and tighter bass. I stumbled upon this thread while searching for similar experiences from others. I can't go back to the manufacturer's recommended VTF range without feeling shortchanged. This is a wonderful cart at the 1.8 gram setting on my arm.
Tbg, I had the tail slightly up. I tried setting it flat but tail up sounded better, with more air but without losing the lower frequencies.
Jtinn, Mike and Steve, thank you for posting your observations on using below recommended VTF for your A90s. Have you kept those lower settings since the time you posted this information in March without the ill effects predicted by Ortofon showing up in your cartridges?