Equipment Stand placement?

I tried both, with rear ported speakers on a side wall and between at the back wall.
My ideal thought would be to have the power amp in the middle (if stereo) or closest to speakers (if mono) with shortest speaker cable length and longer interconnect leading to a side wall equipment stand placement.
Having not tried the different cable length but comparing with same length I could not tell the difference it made to the sound (even at high volume) with placement at side wall or between at back wall.

My current set up (in a new room) has the equipment in between on the back wall. My observations are similar sound but varing degree of change to the sound when trying out any new isolation product.

kthomas: earlier this year, i reconfigured my system placement to replicate what megasam calls the "theoretical ideal set-up." my equipment rack is now on the right-side wall, aft of the first reflection point. the only thing between my speakers is my amp. when i moved the rack, i also put up 7 asc sound panels between and in back of the speakers (there had already been tube traps in the corners.) this relatively simple change brought about, for me, one of the biggest improvements i ever made in my audio system. the soundstage became much deeper and wider. image placement was more stable and airy. bass was tighter and deeper. yes, this required a single 7 meter run of balanced interconnects but it was well worth it in my view. indeed, i'll never allow a rack, or anything else but an amp, between my speakers again. -kelly

There are advantages other than running shorter interconnects by having your equipment between the speakers.
If you are using a line conditioner it keeps you from having to invest in several conditioners or extremely long and expensive powercords. If you have equipment that is as gorgeous to the eye as sonically pleasing to the ear then you want to highlight it and if you have it buried in a corner it does not have the same appeal. The more senses invloved in any experience the greater the rewards.

Also the main reason not to have your equipment between your speakers is for soundstaging and imaging - - if you use really low racks or amp stands you will not have a problem.

I personally like the aesthetics of having the system between the speakers - - I like the fact that many components look like fine sculptures. In the showroom we have no racks above 24 inches and our depth and soundstaging are excellent. Then again we have treated the rooms since that is 25% of the sound.

From a practical point of view as expensive as powercords, interconnects, and speaker cables can be even with places such as Audiogon to purchase audio you will get better sound by using shorter runs and purchasing better cables than by buying longer runs of lesser cables and having your system in a corner.

The key factor is if you place a televison, or a tall rack between your speakers you will have a more difficult problem.

Also as you pursue your audio Nirvana remember it all starts at the wall. Your audio system is like your own health it can only be as good as what you feed it.

My experience is exactly consistent with Megasam's and Cornfedboy's. Another principle is to move your rack away from the wall. Bass tends to stack up along walls and will energize the rack and components placed there. The performance of my turntable was greatly improved by moving the rack to the side (5m of balanced IC from pre to power) and about 1' from the sidewall and 5' from the back wall. This was recommended by the guys at ASC when they were helping me with room treatments. I also added Sonex foam behind the rack.

What I did to improve this was to use 50 Hz and 100 Hz test tones + SPL to find the lowest response place close to my speakers.
Guess what? in my room it happened to be between my speakers
behind their plane about 1 ft. My equipment is in separate tweaked sand box(45lbs) /inner tube boxes 1 for preamp, 1 for digital source and 1 for the amp. Results very good. Height with each is less than 12 inches
Good luck.