Rear Speakers won't work in 5.1 - AVS Forum
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post #1 of 11 Old 11-02-2013, 12:45 AM - Thread Starter
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I have a 7.1 setup and using a Pioneer 1222k as my AVR. I finished the calibration and put in a 5.1 movie and the rears were not working at all, but when I put a 7.1 movie in there do work. I figured all 7 would be working even in a 5.1 movie am I wrong?

Also, the MCACC calibration put my sub crossover at 150hz. Is this bad? Everywhere I've read said to stick around 80.

Thank you.

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post #2 of 11 Old 11-02-2013, 10:33 AM
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As to your crossover, what speakers do you have? That will determine where you need to set your crossover at.
As far as your 5.1/7.1 issue, your receiver will have to synthesize the rear channels, Dolby PLIIX maybe? Read your manual, it should describe how to set it. I have a Pioneer VSX-1018, but I have never had more than 5.1 setup with it.
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post #3 of 11 Old 11-03-2013, 01:58 AM - Thread Starter
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So with the setting in the AVR does that mean the sides and rears share the load persay? Will this affect the sound coming out of the sides since it's sharing with the rears?

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post #4 of 11 Old 11-03-2013, 01:18 AM
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That would be per se (latin) smile.gif It means that your avr will take the surround signal and matrix new signals for the rears accordingly, doesn't have anything particularly to do with the amp load (except that the amp will be asked to now feed power to your rear surrounds accordingly and if that avr doesn't have discrete amps for each channel, then in that sense will be sharing the load across all the speakers). Crossover of 150 indicates you have some pretty small sat speakers, but you'll have to share what they are....

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post #5 of 11 Old 11-03-2013, 01:20 AM - Thread Starter
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Infinity Beta 50 towers for the L/R
Infinity C-351 for Center
Infinity OWS-1 for the 4 surrounds

Sub is Rythmik LV12R

The lowest is 80(Center Channel)

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post #6 of 11 Old 11-03-2013, 01:55 AM
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Quote:
Originally Posted by mijotter View Post

Will this affect the sound coming out of the sides since it's sharing with the rears?
Yes. If you're listening to a typical 5.1-speaker layout, there will be some sounds that will be heard at your sides and other sounds that will phantom image behind you.

If you're listening to a 7.1-speaker layout, PLIIx will extract the sounds that would have phantom imaged behind you and send them to the speakers placed behind you. (makes sense) So, those particular sounds are removed from the surround channels and sent to the Rear speakers. The information that is left over in the surround channels is sent to your Side speakers.

This is how you get rear-vs-side separation in the surround field, even when listening to 5.1 soundtracks.

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post #7 of 11 Old 11-03-2013, 02:03 AM
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I remember some of the Pioneers set a single crossover in the past. Is this avr setting crossover separately for each speaker and some are 150 and the center is 80? Looking at the Beta 50, at least what I could find, would think would be better at 80 than 150...sometimes you just need to rerun the auto setup, too (is this with a single listening position measurement or multiple? did you use the microphone at ear height and pointed at the ceiling etc?).

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post #8 of 11 Old 11-03-2013, 11:31 AM - Thread Starter
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I believe it set that 150 crossover for everything. However, this is my first time running this AVR so I would have to go back and check for sure and report back. I did the calibration at ear level from one position and pointed at the ceiling yes.

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post #9 of 11 Old 11-03-2013, 11:32 AM
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Quote:
Originally Posted by mijotter View Post

I believe it set that 150 crossover for everything. However, this is my first time running this AVR so I would have to go back and check for sure and report back. I did the calibration at ear level from one position and pointed at the ceiling yes.

How did you position the mic? Did you use a mic boom or stand? You should be able to go into the avr and see what the crossover setting is/are, report back....

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post #10 of 11 Old 11-03-2013, 11:59 AM
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Are you sure that the 150 figure isn't for the LPF for the LFE channel? This needs to be set to at least 120Hz (some amps allow higher) because the LFE channel may contain sounds up to 120Hz. This is different to the crossover settings for the speakers which are the point where the lower notes get diverted to the subwoofer.

In this case larger speakers wouldn't normally be set as high as 150Hz, though it'd quite possible that it may sound better set to say 100/120Hz than 'standard' 80Hz, you need to listen to familiar tracks and film clips to decide what sounds best to you. The only 'rule' being that you shouldn't change speaker crossovers to a lower setting than the amp's set up has configured, but it's OK to raise them higher.

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post #11 of 11 Old 11-03-2013, 11:41 PM - Thread Starter
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It is mccacc. It says x.over is 150hz which is the crossover frequency. Is that lpf?

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