Axiom Home Page Forums General Discussion Home Theater Mounting QS8 without back wall

sirquack,

I was looking at your setup. My setup will be somewhat similar to yours but for now it is not a dedicated HT. For now i am still in the designing stages of this room. So everyone knows I am in the process of an upgrade to a better HT. I would love suggestions for seating distance, speaker placement etc etc. My future plans most likely include a PJ but for now it is an old Hitachi 53 inch RP HDTV (1080i only):( My next upgrade will probably be a 55 inch samsung led.

My thoughts about the room have gone from placing speakers throughout the room for HT/multichannel audio to basically splitting it in half. It is going to be a multipurpose/HT room. My speaker choice is leaning towards M60/M80 vp150 and 4 qs8's (eventually). Currently I am building a Rythmik ds1500 (vented model with the new 500 watt Rythmik amp).

This process is going to include rewiring the room (low voltage and some high voltage) tearing into sheet rock. Building a media rack etc etc. This a total remodel. The room was a garage and is becoming the HT/MP room.

Thanks for all the help
Bill

Hey, I want to hear more about your Rythmik build!

I wanted to build a sub, a friend of mine has more knowledge than I do and the necessary woodworking tools, so we are building it together. I took some pics of the process. Here is how it came about>

I did a bunch of research @AVS. I decided on a Rythmik build. I downloaded the plans from Rythmik and purchased the Driver and AMP. I decided on a vented model (which by the way I have not read about anyone building).

So I bought a sheet of 3/4 inch MDF and we started the process. I will tell you that the instructions are ok from Rythmik but the measurements seem a little confusing for a first time sub build such as myself.
As we approached the time to deal with the ports I found it necessary to contact Brian @Rythmik. He was very responsive and pointed mr to ports sold at parts express. He told me I should go ahead with a dual ported model (so I did). We installed the ports. The ports are 3 inch ports by 18 inches long.

Next I saw that Rythmik was coming out with 500 watt servo amps. So I contacted Brian and he advised me that I could upgrade to the 500 but not the 600 for the DS1500 driver that I purchased, so I paid him the $$ (only $70 xtra).

We are currently in the final stages of making the box look nice. I had to decide on a finish. I really wanted a piano black finish but decided against it due to the likely hood of error. I decided on a Real wood laminate (Red Oak). I purchased a jet black dye and a gloss lacquer. So we are currently applying the laminate.

We cannot wait to test the sub. If you guys want I will post some pics later tonight.

Bill

Of course we want pics, even if there's no Teri in them.

My room is 26' deep and after reading this, I measured and my seating area is right at 13' doh

My front speakers are 3' off the front wall though, so I was wondering if that made a difference, or are the walls the critical thing?

Walls. You will be missing bass at that spot (or getting ridiculous booming).

Thanks for the reply! *starts pushing his couch*

BillH,

As some will recall, I went through ad nauseum testing of back wall vs mid ceiling mounted 7.1 rears. I had ordered QS8s for the backs. My room is 31' deep by 23'wide (seating 12' from screen, back wall 16' behind seating). Originally I had direct firing spkrs on the back wall. Yes, Audyssey (or other) does adjust for the distance, BUT if anyone is occupying that rear half of the room (my wife did), they get blasted by the elevated dB level req'd to reach the seating position! After much OCD testing/thinking, my wife actually preferred the idea of mid ceiling mounted 7.1's so she would not get blasted! I caught much grief with back wall 7.1's! Do not do this, trust me.

The bottom line from my lengthy testing:
1) Back wall- no way, unless no one is ever back there, but if you must, use direct firing speakers.
2) Mid ceiling, 7' or so back from listening position worked best in my large great room. AND both my wife and my concerns that they would look like eyesores mid ceiling was not the case (for us).
3) In mid air, in my large room, the QS8s did not project well. They lost too much low end! The theoretical 'rule' is that the sub picks up the missed low end. In my case, when turned up to loud movie levels, the radiant firing Q's sounded way too bright. The M2 sized direct firing speakers had much better sound (bass, etc), which makes sense due to the much larger interior space of the bookshelf style spkr.
4) Looks of mid ceiling: I actually covered the black DF speakers with white paper to see how they blend in better. Now we don't notice them much at all. I will eventually get some white speaker cloth too.
5) I made my own custom brackets thinking I needed to be able to rotate them towards the back half of the room for 7 ch stereo for parties or just full room listening. The 7 ch stereo sounds great with them facing to wards the HT. The M80s seem to fill the room just fine so it sounds good everywhere.
6) I used my DIY 8' speaker stands to test speakers (QS8 vs. direct firing) and best location for over two weeks. Did I mention OCD.


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Photo bucket- many photos


If you want to read my saga in it's entirety, you can find it here.. (Warning: enter at own peril... 11 pages )

Ok here are some photos of the build. Sorry for the poor quality (camera phone):










I am currently applying lacquer to the laminate and hopefully can provide a nice picture of the finished product. The crappy pictures don't do it justice. It is turning out nicely.

What a great and informative post. Thank you I certainly appreciate your help. One thing, it sounds as though if you were to order the M2 again, you would order them in white. Am I correct in my understanding.

Bill