Lyra Lydian Beta, Rega hum?

I have a Lydian Beta with a rega p25/rb600. Bat pre and phono stage. No hum at all. Got to be something you can troubleshoot such as Jim's advice above. Also, maybe a defective cartridge?

Also, I'm curious what you think of the TT/cart combo. Sounds lean to me...not a lot of body...bass is great and soundstaging is great. maybe my cardtridge loading is off or VTA-since it's fixed?

The only thing that left for you to do is to contact Immedia and report that problem. It might be a problem with cartridge internal wiring.
BTW Rega turntable is a big compromise for Lyra but it shouldn't hum. Lyra can deliver much more from the Basis 1400. Basis 1400/RB300 combo will definitely smoke your current analogue setup.

The P-25 isnt causing the hum.
The Basis 1400 does not 'smoke' the P-25
I listened to both before buying the P-25
The Basis is better for light classical and Jazz but the P-25 SMOKES the little 1400 with good old rock and roll! All depends what you want from a table.

Thanks all for responses so far.

All contacts are tight and on the correct pins. Hum is from both channels and is heard all the time. Jimbo3, how would I ground a Rega turntable?

Today I put a B&O cartridge from my circa 1982 beogram RX on the Rega. The hum is now a factor only at high volume. It would be something I could live with if it were a decent cartridge. I don't think this proves the problem is with the Lyra. The low level hum with the B&O is the same as with the Lyra, only at a much lower level. Maybe the Lyra is more sensitive?

I clearly don't know what I am talking about.

Jfrech, I wish I could comment on the characteristics of the Rega/ Lyra combination, but so far it is unlistenable.

...ain't rock-n-roll only in the world David, but for even listening to Metallica I would bet more on Basis1400.