What defines an advanced system? Complexity? Cost? Measurements? Subjective sound quality as perceived by a select set of listeners? I tend to think of an advanced system as one that employs sophisticated techniques, such as more speakers, more drivers, electronic digital crossovers, perhaps a double bass array setup to eliminate lower bass room modes, or at least a distributed bass array of some kind with equalization. It may or may not sound good to everyone but it is certainly advanced in the sense that it couldn’t have been done with older technology. I’m really interested in things like AI upmixing to separate instruments into different channels, or cross talk elimination. I’ve heard crosstalk elimination and for me it’s an absolute improvement - at least on some recordings. The cross talk from a standard stereo configuration is an obvious flaw that gives the same kind of sound flaws always, with any two channel system that doesn’t eliminate it. We learn to hear past it but it’s way better if you don’t have to. Although I think some people have learned to love it and stereo just wouldn’t sound right to them without it. They've got a point that the recordings were mixed and mastered with the inevitable crosstalk in mind, but I've not heard properly implemented crosstalk elimination make anything sound worse to me. I think what happens is the crosstalk sets an upper limit of expectations on what a recording can sound like, which might be why I've found the most compelling recordings with crosstalk elimination to be the ones that weren't mixed at all - just recorded straight as stereo. I’ve learned to hear past it most of the time. Trying to eliminate it is just too much of an inconvenience.
My take on subjective vs. objective
I’ve been thinking about these words lately and feel there is a disconnect with how these words are being used in audio forums and how I would normally use them. I think of subjective statements as statements of value judgement while objective statements are statements of material fact, whether true or false. "The cat is on the mat." That’s an objective statement. "It is good and proper for the cat to be on the mat." That’s a subjective statement. So if an audiophile declares that one cable sounds better than another, that is on its surface a subjective statement - a statement about a preference. But there is an objective statement hidden in it, and that is that the cables do indeed sound different, as measured objectively by the listener’s senses, presumably by their hearing alone. The argument comes in as to whether they can still perceive that difference if they don’t have any other information to work with other than their hearing. Can the ears alone distinguish the sound or is the sound perceived to be different only when other senses are involved? This argument is purely an objective one about what can actually be perceived by the ears alone or what requires other senses to be working in conjunction with the ears in order for the difference to be perceived.
So the people that get labeled "objectivist" are the ones who want to know what can be heard when other sensory data is not available. The ones labeled "subjectivist" are the ones that want to know what they can perceive as sounding different when they are fully informed about what kind of equipment they are listening to. These are both objectivist. One should be called hearing exclusive objectivist while the other is called fully sensory informed objectivist.
A similar situation in the visual would be to compare lengths of things by eye. If a person looks at a piece of dowel sitting on a table, and then looks at another piece of dowel nearby and declares that one dowel is longer than the other, that’s a perceptual measurement they have made by eye - an objective measurement. They could also subjectively declare one length to be better looking than the other. They could then put the dowels side by side to give the eyes a more direct perspective. It may be noticed that they seem identical in length when right next to each other, so they then measure them with a gage that repeatedly and consistently reveals that one dowel will fit into a slot a bit easier than the other, so that indicates that one is slightly longer than the other. But maybe it’s not the one that the observer thought was the longer one. Maybe one dowel weighs more than the other, so this gave the observer a sense that the heavier one must be longer. It’s still all objectivity here. All objectivity requires perception. Tools give us different ways to assist our perceptions and perhaps draw logical conclusions. If the person insists that the heavier one is longer visually even though it fits in the slot easier, they are making an objective statement that it looks longer, not that it actually is longer.