Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: How many inches are between each shelf (length wise)?
Document: Sure, there may be other racks that put looks over function, but if you need deep shelves with large openings for your phat gear, this is the value buy.I bought this thing to house my home theater gear and a 200 CD changer. The CD changer alone is 19 inches deep and 7 inches tall and just won't fit into a fancy stand sporting a wire blind or shabby 4-6 inch shelf spacing.
This isnt very decorative, there are so many out there to choose from why should you settle for this.
This is a really functional and easy to assemble audio stand.I purchased it based on the picture in the listing, not the totallly incorrect dimensions listed in the description:27 x 21 x 5.2 inches1. It is 34 inches high.2. The shelves are 23 inches wide.3. Space between the pillars is 19 inches side to side and 15.5 front to rear.4. Space between the shelves is 9 inches.5.
Very easy to assemble, has very classic lines, lets stereo equipment have plenty of ventilation, hard to find add-on shelf in maple. Holds a lot of equipment.
Although I knew the dimensions of the unit, it is too large for my shelf to house all the components. Assembled three of the four shelves because of the size. Sturdy and offers wire guides through the shelves.
* This is for my office audio system. * My vintage Marantz 2270 sits on the top shelf. * My cheap Optimus turntable is second from the top. (The Rega is with the main audio system. )* The Sony SACD changer is on the third shelf down. )Its form follows its function. It works for me.
* Very stable* Low resonance* Neat fit and finish* Strong* Beautiful (way more than in stock photos)IMPORTANT: After checking the Technical Drawing at Sanus official web page, I was very concerned about back shelf corners being sharply 90 degrees squared. That is not the case. They are a little rounded.
The stand must be wide, deep, and high enough to accommodate all the components. Shelf adjustability was not a requirement, but it would have been a plus, as this stand has fixed shelving.4) Strength. The stand had to be strong enough to comfortably support a heavy amplifier; the other components being of light to moderate weight.5) Correct Height.
this unit is good looking, very stable and easy to assemble. the legs are steel and the shelves are a solid wood with a nice smooth shellac like surface. they are wide enough and deep enough to hold most equipment. each shelf should easily handle about 50 pounds. they are holes in the rear of the bottom 3 shelves to run your wires.
The top shelf is larger than the other three in case you have a very large turntable, or want to put two components side-by-side. The height of 33&#34; is about perfect, as well, and the cable-routing holes are a nice touch. Considering that some comparable racks cost two or three times as much, this Sanus rack is a definite winner.
Answer: There is 9 inches clearance between the underside of one shelf, and the top of the shelf below (anything shorter than 9 inches should fit between shelves). There is 19 inches clearance at the front and back, between posts (anything less than 19 inches wide should be able to pass through from front to back). There is 15 inches clearance on the sides, between posts (anything less than 15 inches wide should be able to pass through from one side to the other). And these aren't rounded - all measurements came to whole inches.