A "stand alone" phono preamp would presumably have no inputs other than for phono, as distinct from a "full feature" preamp, which, unlike a "line stage" one, would have provision for phono along with other inputs for CD, AM/FM tuner, and so on. An integrated amp would add a power amp to all this. There are dozens of "stand alone" phono preamps, some with and some without a volume control, which will be needed if the phono preamp goes straight (except for the volume control) into a power amp. I use "stand alone" phono preamps with (to control volume) so-called "passive preamps"--a misnomer, as often noted, since they don't amplify. I'm one of those who prefer the transparency and immediacy of a good passive to the seductive additions of even the best active preamps--for example, the CAT SL-1 Signature I used to own. Passives can use potentiometers but most would agree that the best use rotary switches and resistors in a "true ladder" configuration. www.goldpt.com is a great website for learning about several types of resistor-based passives, while www.bentaudio.com at least used to offer the makings for a transformer-based passive that some prefer. I've made both types and like the transformer-based type even better than two "true ladder" types I've built, one using Holco resistors, the other Audio Note Japan tantalum resistors. I like all three of them better than any active preamp I've ever heard; others disagree.