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Post by leftycrusher9 on Mar 27, 2017 23:16:58 GMT -5
Okay, I have kind of a dumb question. I am building a dedicated home theater and I am at the stage of running wires in the wall before the insulation and drywall crews come in. I am prewiring for 7.2 however I plan to have 2 rows of seating with a side surround for each row. Plan to purchase Emos 7 channel amp so I would be wiring 2 speakers on each side surround channel (Emotiva UAW 8.2) so it would basically be a "hybrid 9.2" system on 7 channels. Since the UAWs are 4 ohm speakers and my fronts and center speakers are 8 ohm (paradigm monitor 7 and cc-130), how would you guys recommend I run these without interfering with soundstage or risk of damage to the amp or speakers? Series or parallel? Probably overthinking it but any help would be appreciated.
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DYohn
Emo VIPs 
Posts: 18,486
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Post by DYohn on Mar 27, 2017 23:34:13 GMT -5
Just make sure you use CL2 or CL3 wire.
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Post by leftycrusher9 on Mar 28, 2017 0:20:57 GMT -5
I did, 14 gauge
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fattykidd
Sensei
It's ok.. I have an et-3.
Posts: 122
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Post by fattykidd on Mar 28, 2017 0:27:33 GMT -5
Series, you want an 8ohm load.
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Post by jlafrenz on Mar 28, 2017 10:10:00 GMT -5
Why not just run a dedicated amp channel to each speaker? I don't advocate running the same channel to multiple speakers. You end up introducing more issues than what you gain from this type of setup.
Perhaps I am missing something, but why are you wiring in 2 side surround speakers on each side?
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Post by simpleman68 on Mar 28, 2017 10:53:21 GMT -5
Whatever you go with, I'd recommend running a flex conduit in your walls/ceilings. You can upgrade your wires anytime and it's a snap to do. I ran conduit to the sidewalls as well in case I wanted to put subs there in the future and, as it turns out, I did add subs in both spots. Scott You can see the blue conduit in ceiling and side run here:  Brought the conduit runs into the top of the equipment room. Please ignore the rats nest that has been cleaned up since this pic. heh heh  |
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Post by leftycrusher9 on Mar 28, 2017 18:04:12 GMT -5
That's a good idea. May run some for a potential future upgrade for an Atmos set up.
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Post by leftycrusher9 on Mar 28, 2017 18:06:56 GMT -5
Why not just run a dedicated amp channel to each speaker? I don't advocate running the same channel to multiple speakers. You end up introducing more issues than what you gain from this type of setup. Perhaps I am missing something, but why are you wiring in 2 side surround speakers on each side? I have 2 rows of seats and I wanted a set of side surrounds for each row of seats. I would need a 9 channel amp to power each channel. Don't have the extra real estate for additional amps. |
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Post by gus4emo on Mar 28, 2017 20:06:52 GMT -5
Why not just run a dedicated amp channel to each speaker? I don't advocate running the same channel to multiple speakers. You end up introducing more issues than what you gain from this type of setup. Perhaps I am missing something, but why are you wiring in 2 side surround speakers on each side? I have 2 rows of seats and I wanted a set of side surrounds for each row of seats. I would need a 9 channel amp to power each channel. Don't have the extra real estate for additional amps. Why not using bipole speakers for the sides? |
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Post by leftycrusher9 on Mar 28, 2017 21:15:54 GMT -5
I have 2 rows of seats and I wanted a set of side surrounds for each row of seats. I would need a 9 channel amp to power each channel. Don't have the extra real estate for additional amps. Why not using bipole speakers for the sides? Well the UAW 8.2 is what I have. Besides I got a good deal on them at Emofest |
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Post by pknaz on Mar 28, 2017 21:30:10 GMT -5
If you wire up and configure the back row "side" speakers as "side" speakers, then the front row is going to get an out of phase and out of timing sound source from behind them, which will really mess with imaging, staging, and general psycho-acoustics. Lookup the Dolby spec, side speakers can be between 90 degrees and 110 degrees to your seating position, this allows you to put the side speakers at a 90 degree to your second row, and should be in the proximity of 110 degrees to your front row. Here is an example:  |
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Post by leftycrusher9 on Mar 28, 2017 21:41:26 GMT -5
If you wire up and configure the back row "side" speakers as "side" speakers, then the front row is going to get an out of phase and out of timing sound source from behind them, which will really mess with imaging, staging, and general psycho-acoustics. Lookup the Dolby spec, side speakers can be between 90 degrees and 110 degrees to your seating position, this allows you to put the side speakers at a 90 degree to your second row, and should be in the proximity of 110 degrees to your front row. Here is an example: Is that assuming you are using dipole or bipolar speakers? I'm using in wall speakers. Sorry for my stupidity in this case. I'm still learning and I REALLY appreciate everyone's input. |
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Post by pknaz on Mar 28, 2017 23:25:11 GMT -5
Your emo in-wall speakers would be perfectly fine in this setup. No need for bipole speakers.
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Post by gus4emo on Mar 29, 2017 7:46:14 GMT -5
Why not using bipole speakers for the sides? Well the UAW 8.2 is what I have. Besides I got a good deal on them at Emofest Emo has bipolars too. |
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Post by mgbpuff on Mar 29, 2017 13:42:48 GMT -5
I have done this, but mine are not in wall. Wire the two left surround speakers in series and then back to the left surround channel. Same with the right two surround speakers. Amp LS (+) --------------------[+ LS spkr #1 -]------------------[+ LS spkr#2 -]------------------ - Amp LS (-) Repeat for right side. Plan carefully, wiring in series is a little tricky with CL2, Basically, differing colored wires will be jumpered together between the two cables at the amp end . Attachments:
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Post by goozoo on Mar 29, 2017 14:21:40 GMT -5
Not knowing the layout of your room makes answering this questions a bit tricky. As you know, you have to wire the side surrounds in series as wiring in parallel would reduce your impedance to 2ohms making them unstable for your amp. With series wiring, you bring the impedance to 8ohms. What you have not mentioned is how/if you plan on implementing rear speakers or are planning on placing your second row of speaker a little further back to act as the rear channel? Keep in mind that the side channel is now driving double the speaker load and as such, you want to make sure you have enough power to not clip during peak output. Alternatively, you could do a separate amp for your second row of side speakers and mux/mix the signal from one into the other like it is done in a commercial cinema (through the use of a small pro mixer). Either way, make sure you have enough amplifier power and your AC wiring into the room can handle the eventual load it will need as time goes by and you upgrade your system. Our current recommendations to our clients for personal home theaters is at least 2 20A circuts. Additionally, as you are doing new construction, consider running 4 pair wire and 2 pair wire through the conduits to each speaker location (especially the sides). This is so that you can bi-amp the speakers should you ever decide to upgrade as well as be able to place in-wall subs. Room permitting, also consider running 4 pair wire for 6 drops in the ceiling should you ever decide to do full ATMOS sound. Once again just some suggestions based on what we see with our retrofit installs; and wiring now is pretty cheap compared to later.
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Post by leftycrusher9 on Mar 29, 2017 23:42:01 GMT -5
Here is my layout Attachments:
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Post by mgbpuff on Mar 30, 2017 3:14:50 GMT -5
So what seating position is your MLP? It seems to me that the front row should include a center chair and that should be the MLP. How many speakers are you going to use (you have 7 Paradigms and 4 Emotivas)? I assume you are retiring 2 of the ADP-190 V5 speakers? Do you ever want to do Atmos? Do not worry about the arraying of 2 speakers for the LS and two for the RS, you have an ideal situation with the Emo 4 ohm speakers and you will have enough power. As far as misphasing, you won't have any; speakers react to current and your two series speakers see the exact same current. As for imaging, the two side speakers will phantom into a single source at a mid location and the apparent angle will depend on your first row or second row seating location - it will be fine.
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Post by leftycrusher9 on Mar 30, 2017 6:46:32 GMT -5
Thank you guys so much for the info. Definitely brought to light some things that I did not remotely consider. You all rock!
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Post by goozoo on Mar 30, 2017 16:45:37 GMT -5
In looking at your floor plan and some of the layout, I would suggest that you consult with someone more experienced in designing home theaters. You have a lot of room to work with, but the room layout (which in turn will effect speaker placement) needs some attention. I don't know what stage of the project you are at as the preceding statement may be moot. If there is time to make changes, now would be it and you will be a lot happier in the long run. You will also need some height elevations drawn out as it will also make a difference where you place the speakers as well as screen size, distance, etc, etc.
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