Often, and in many Preamplifiers, not a heck of a lot of money is invested into the phono stage. Even in many quite expensive Preamps.
Those who climb the vinyl ladder know that to achieve better, and impressive sonic quality, it's a large ball of wax, many components come into play before that signal ever reaches the Preamp.
The AT Cartridge should by all rights be a very nice performer. Now what about Table, Arm, proper set up, the phono cable, which does have a quite apparent difference between the bad, and the good, and the very good.
Usually, no money is wasted here, the signal is very low voltage, and proper shielding-grounding, and high quality wiring-conductors is paramount.
Often, phono systems can act like nasty antennas, and be a bane no matter the money spent. And it can be a specific flaw, and cause from a phono stage.
That's a disaster at any cost, hearing the radio when playing vinyl.
It was one aspect that sold me years ago to buy the Sutherland PHD Phono Stage. This Battery Powered Phono Stage is quite immune to the issues of RFI and EMI interference. Being battery powered removes it from the electrical grid, and it's case is substantial to help shield, the design is smart, its innards, like all Sutherland products are laid out so cleanly and logical.
No, it's maybe not in the league of a top tier Manley Steelhead Phono Stage, or beyond, but it's dead quiet with extremely low noise floor, quite adjustable, just change 16 D-Cell Batteries about every 12-14 months is all.
And it sure does not seem to lack sonically, it pushes many right buttons.
No power switches, the unit activates and shuts off automatically via sentry monitor which is adjustable via a Pot on the Motherboard. You might be able to find such for a 1/3rd of its brand new price since it's no longer produced.
Usually, phono stages particularly the Sutherland Units are quite durable, and trouble free.