Noticed this posted in one of my threads about Infinity:http://www.avsforum.com/avs-vb/showt...=647998&page=4
I think the poster meant to put it here ....
I'll be happy to give my views on the Infinity Primus series but can't contribute any further afterwards to the Owner's thread since I was not the Systems Design Engineer on the Primus.
-The Primus series was designed approximately four years ago by Bill D. who sat in the cubicle next to mine.
-In my estimation Bill is one of a handful of great loudspeaker design engineers. Bill has devised support software which complements the normal LEAP program we all used. For crossover design this software allows him to quickly come up with an extremely low parts count crossover which gives the best linear on-axis and (off-axis) power response envelope. It is this end result which allows the Primus series to be what I consider the absolute lowest price/highest performance ratio of any loudspeaker series in the Infinity line (if not the entire industry).
-for cost reasons the Primus line and all of its parts were made in China. The crossover components, both capacitors and inductors were lower quality implements that Bill was tasked to use for cost reasons. Same with the cabinet. The Chinese equivalent of 5/8 all around the wrap and back and I believe even on the front baffle. (Though the front may be ¾ (or 19mm).
-I would strongly suggest against ever trying to upgrade crossover parts in the quest for more performance. It isn't gonna happen. Plus loosening and tightening the screws a couple of times and you'll start to quickly wear out the threads cut into the brittle MDF that is used on these cabinets.
-the greatest chance for seeming unit-to-unit imbalance will come from the production variations of the tweeter. Again, low cost drives a wider plus or minus variation in each tweeter's response. (I bet this opens up a can of worms)
-In closing I'd recommend never trying to modify or mess with the Primus or any loudspeaker unit for that manner unless you really know what you're doing. Just play with set-up, positioning and pointing your speakers and read everything you can about how to fix your room acoustics. Because once that sound launches from the speaker cones they've already performed their electrical-to-mechanical-to-acoustic sound wave trick. From there the room takes over. And the further you are from your speakers the more influence the room will exert on the sound at your ears.
Good luck to all'