There's a big difference between carts with a cu around 20, and those closer to 50. Most modern MM/MI carts have a cu around 20, and are designed to work in med mass arms. A cart with a cu around 50 (Sonus) might sound sluggish in a med weight arm. Some with a cu around 20, sound sluggish in a heavier arm.
The Sonus Formula 4 arm was a 4.5g oil damped unipivot. It can sound spectacular with carts of 20cu or greater. However, the structural rigidity will not support heavy weight or lower cu carts.
I think these aspects of cart/arm matching are often overlooked in evaluations. Japanese carts often have cu rated at 100Hz and are not comparable to 10Hz figures. Rules of thumb, multiplying 100Hz cu by 1.8 to get 10Hz cu, sometimes works, sometimes not.
Regards,
The Sonus Formula 4 arm was a 4.5g oil damped unipivot. It can sound spectacular with carts of 20cu or greater. However, the structural rigidity will not support heavy weight or lower cu carts.
I think these aspects of cart/arm matching are often overlooked in evaluations. Japanese carts often have cu rated at 100Hz and are not comparable to 10Hz figures. Rules of thumb, multiplying 100Hz cu by 1.8 to get 10Hz cu, sometimes works, sometimes not.
Regards,