Here's one formula for a big soundstage with holographic imaging:
1. good recordings (ideally binaural, but good luck finding them for music you like)
2. highly directive (focused) loudspeakers, such as Sanders, JansZen, or some KEF models ... or, alternately, a combination of room treatments and effective placement of the speakers you already have
3. crosstalk-minimizing DSP software (BACCH or possibly HAF)
BACCH4Mac would cost you about $1K (plus the price of a Mac if you do not have one) for the "intro" version. The effects can be quite dramatic (on some recordings more than others). For example, a performer who seems to be playing out of your left loudspeaker, pre-BACCH, might seem to be playing several feet to the left of the loudspeaker, post-BACCH. The developer (a physics professor at Princeton U.) claims that these effects result without otherwise coloring the sound signature. A trade-off is that the effect mostly occurs only within a very narrow sweet spot (which can be a show-stopper for some people.)
Short of DSP software, I would think your biggest bang for the buck comes first from proper speaker setup (which can be cost-free) then room treatment. Then gradually building up a library of excellent recordings.
1. good recordings (ideally binaural, but good luck finding them for music you like)
2. highly directive (focused) loudspeakers, such as Sanders, JansZen, or some KEF models ... or, alternately, a combination of room treatments and effective placement of the speakers you already have
3. crosstalk-minimizing DSP software (BACCH or possibly HAF)
BACCH4Mac would cost you about $1K (plus the price of a Mac if you do not have one) for the "intro" version. The effects can be quite dramatic (on some recordings more than others). For example, a performer who seems to be playing out of your left loudspeaker, pre-BACCH, might seem to be playing several feet to the left of the loudspeaker, post-BACCH. The developer (a physics professor at Princeton U.) claims that these effects result without otherwise coloring the sound signature. A trade-off is that the effect mostly occurs only within a very narrow sweet spot (which can be a show-stopper for some people.)
Short of DSP software, I would think your biggest bang for the buck comes first from proper speaker setup (which can be cost-free) then room treatment. Then gradually building up a library of excellent recordings.