Grado Reference Sonata on a Rega P5 ?

iown a grado sonata it is a great cartrige brings out the inner details of the music but they are not shielded so any table that does have a isolated motor can get hum

Intolerable hum occurs with a Grado/Rega combo; I fabricated a metal plate of mu-metal from Magnetic Shield corporation so I could use a Sonata on a Rega, which worked fairly well, but it required more effort and expense than necessary, considering the many alternatives.

I had a Rega/Sonata - replaced the cartridge and discovered that there are better cartridges than Grado.

Thanks guys......I'll probably be exploring the Dynavector 10x5 and Benz-Micro ACE S H as good matches for the Rega P5. "Bang for the buck" thinking will probably favor the 10x5.

You should also try the Exact 2 - that's what I have on mine, though I have heard the Dynavector is great on it as well.

An inexpensive cure for the Rega/Grado hum problem

The motor and platter bearing **must** be grounded to the base of the tone arm. I have no idea why Rega does not do this, but it is effective. You do not have to shield the motor. I had to file off some of the finish on the motor in order to be able to solder to it, but the result was no more hum with either a wood-body or plastic body Grado.