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Re: Do I need 2 channels to run 2 subs?
CV #280824 11/29/09 03:01 AM
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Wow, well I read that sentence dozens of times, but only that time did I read it the way you interpreted it. That changes my whole outlook on the EP800, I always thought the DSP chip made sure that the speaker never flexed beyond it's capabilities no matter how much juice was feeding it. But now that I realize it's more of a system to keep bass response 'flat', then I guess that doesn't mean I can't push it beyond it's physical limits then eh?

So all those times it sounded like it was 'bottoming out', I figured there was no way I could bottom out a speaker with a DSP running things. Turns out, I probably was bottoming the thing out all along. That's going to take a few minutes to sink in.


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Re: Do I need 2 channels to run 2 subs?
Micah #280825 11/29/09 03:14 AM
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Maybe it was your 80's set to large.


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
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Re: Do I need 2 channels to run 2 subs?
aspicer1 #280826 11/29/09 03:15 AM
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Aaron, there aren't any receivers that actually have two separate sub channels. There's one channel which may send the same source material through two outputs. As was said, in most units the two outputs aren't separately adjustable for different level and distance, although a few of the most expensive ones do have that feature. So yes, unless you get a unit with separate adjustments(which may or may not be needed)a "Y" arrangement is all that's needed.


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Re: Do I need 2 channels to run 2 subs?
JohnK #280828 11/29/09 03:24 AM
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Setting your mains to 'large' will cause subwoofers to bottom out? Is that right? What causes that in a LFE+Mains configuration? I didn't think that setting affected what was sent to the subwoofer, just that it also sent the low frequencies to the mains as well. That was my understanding of the way it worked.

If for some reason LFE+Mains sends extra frequencies to the subwoofer, causing it to bottom out, then perhaps there's our answer. But I don't understand how it would do that?


My Stuff :

M80's
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VP150
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Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD
Re: Do I need 2 channels to run 2 subs?
Micah #280829 11/29/09 03:33 AM
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Micah, there're three different situations: if the mains are set "small" their low bass goes only to the sub; if the mains are set "large" they alone play their low bass; if the mains are set "large" and the sub is set "LFE plus mains" both the mains and the sub play the low bass in the mains channel.


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Enjoy the music, not the equipment.


Re: Do I need 2 channels to run 2 subs?
JohnK #280830 11/29/09 03:42 AM
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I don't know what a dsp chip would do for a speaker. I suppose you could use it to further smooth response, but if you wanted to spend more $ on electronics for signal processing I think it would make more sense to go to active crossovers so that you can tweek the speakers to play flat in your room.


Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
Re: Do I need 2 channels to run 2 subs?
fredk #280831 11/29/09 03:47 AM
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I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne
Re: Do I need 2 channels to run 2 subs?
JohnK #280833 11/29/09 03:52 AM
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 Originally Posted By: JohnK
Micah, there're three different situations: if the mains are set "small" their low bass goes only to the sub; if the mains are set "large" they alone play their low bass; if the mains are set "large" and the sub is set "LFE plus mains" both the mains and the sub play the low bass in the mains channel.


That is how I understood it too work as well. So how does playing the M80's in a large configuration cause the EP800 to bottom out though? If they aren't recieving any more or less than if the M80's were set to small, then I'm not quite getting something?

Thanks btw John.


My Stuff :

M80's
QS8's
VP150
EP800
Denon 4802
Emotiva XPA-3
Samsung BD-P3600
Sharp 65 Inch Aquos LCD
Re: Do I need 2 channels to run 2 subs?
Micah #280835 11/29/09 04:23 AM
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I believe what Randy is suggesting is that your M80s were bottoming out not your subwoofer.


3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1
Re: Do I need 2 channels to run 2 subs?
grunt #280837 11/29/09 04:32 AM
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While not exactly cheap at $1400 and up, my Onkyo 3007 has separate adjustments for each subwoofer pre-out. Both distance and level can be set manually. I also believe but don’t know for sure that it calculates separate Audyssey curves for each. At least on the initial setup it pings both of them separately. AFAIK the 1007 also does this at about $1200 and up. They are however both processing the same signal as stated above.

I imagine Denon’s less expensive models will also be doing this soon if not already.

The advantage this give me is being able to now change the trim settings on my Buttkicker w/o getting my Butt up and walking over to the amp which when it to five times to get it right would kick my lazy Butt. ;\)




3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1
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