Originally Posted by gmore
Have not heard them but researched quite a bit when I built my system. Sounds like your room/system has restrictions so hard to comment on specifics but some very general info/guidelines IMHO...
I've included an updated diagram of my room and proposed improvements.
- many older Harman products(JBL, Infinity, Revel), especially in wall/ceiling speakers share parts/similarities(if not identical) - the C763L is an updated(many would say improved, or at least tweaked to match Revels better) version of the original Revel IC15, JBL LC360, Infinity ERS610.
The big problem is that I'm trying to match existing AV123 Rocket tower speakers form 15 years ago to another company's products. I have to balance sound presentation against form factor. The sound has always been the laid back, lush variety. I recognize most other sound signatures will be a bit brighter...I just don't want them to be too bright and stand out too much.
- Try to match your speakers as much as possible or at least in groups (all 4 atmos the same, surrounds matching fronts an if can't,match the atmos) if not specific brand/series then family sound using tweet material as a guideline (eg: Harmans w/Alum tweets). - in general, I've found many Harmans with CMMD/titanium tend to be a bit more bright/warm(M10/C10) w/ aluminum a tad more warm(C763Ls) - this said, I run F/C208s(alum) with 6 ERS610s(cmmd, 4-atmos, 2-rear/side-walls) and am very happy.
The Atmos speakers will be two in the ceiling and two as height channels against the TV wall ceiling. Given that Atmos speaker orientation is all about expected angles from the main listening position, as you can see in the diagram, I do not have enough space between the couch and the back wall for Atmos speakers in the ceiling behind the listening. There is only about 24 inches of depth available. Someone on another AVS forum recommended using height speakers instead of one pair of the ceiling speakers and I agreed it was a great idea. The diagram has the place up front where I propose to use Revel M8s on wall mounts at the corner where the wall meets to ceiling at 12 ft high. The angle to the couch at about 35 degrees which is well within Dolby's requirements.
- Assuming you have sub(s) and unless 5.1 music a priority, HT for atmos/SR is going to xover'd pretty high and sealed enclosures will work well w/porting not really an issue.
I don't have a working sub...the previous one from AV123 gave up the ghost last year and I have chosen not to invest any more money in repairing it (it's been fixed once before). A new sub will be purchased at some point when I have budget.
I recognize that the M10/M8 series crossover at about 110 hz which is a little high but probably tolerable considering that the M8 form factor and built in wall mounts would solve a positioning problem. For the rears, the choice has either been M10s (since they are front ported and can be placed on stands against the wall pointed at the listening position) or in-wall speakers from Revel. The problem with in-walls are the ability to point them to focus at the listening position (or at least the tweeter). Not sure how flexible Revel products are to solve this problem.
If you're going to run in-ceiling wire for the C763Ls, do it for all 4 atmos speakers, match them and plan your placement(given appox 30 degree angle along with ceiling height) with PLL, and if you're going 5.1.4 and tight for space, consider running a a pr
of them in wall slightly behind PLL for rear surrounds(won't work for proper 7.1.4). If you're going to use M10s(cmmd) for surrounds, you may want to try to find some of the older Harman 'atmos' models listed above for ceiling - they should match well and save you some $$$.
Since the ceiling with be an X.1.2 + heights configuration, the angle of the two proposed C763Ls can be 65 degrees, which places them above the ottoman with the tweeters pointed back at the listener. I've debated about putting the right C763L either at the right section of the flat part of the ceiling or more in line with the front speakers. The wiring will be a challenge for my general contractor who is certainly up for the task. There is a garage underneath this room and I already have wires snaking the ceiling of the garage from the rear side towers I currently already have. There is also wiring on the opposite wall of the TV in the garage stairway from the TV to the equipment shelf.