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post #26491 of 26503 Old 09-20-2017, 06:02 PM
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Quote:
Originally Posted by Cyral View Post
I have two svs pc13u coming in tomorrow.

What port mode would you guys recommend? I guess I will need to run audyssey again after I change the port mode.

The room is about 4000 cubic feet and I like to listen between -10, 0 db.

Will measure it with REW.
I would use the extended mode. I'm only using dual PB12 plus' but I've settled on the 16hz mode after playing around with them quite a bit. I only lose around an average of 1db above 30hz in 16hz mode. Of course compared to the 20hz mode i lose about 4db from 20-30hz in exchange for a massive 10db+ at 16hz. Imo it's worth it. I couldn't even hear the difference in SPL above 30hz, and the drop in the 20-30 range is a fair trade off for the massive boost down low. Especially since you're running duals i doubt you'll need the extra SPL anyway .
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post #26492 of 26503 Old 09-20-2017, 08:51 PM
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Quote:
Originally Posted by Cyral View Post
I have two svs pc13u coming in tomorrow.

What port mode would you guys recommend? I guess I will need to run audyssey again after I change the port mode.

The room is about 4000 cubic feet and I like to listen between -10, 0 db.

Will measure it with REW.
If you will be using them for HT at all definitely extended/16hz mode. That’s part of what you’re paying for. Similar to another post above I have dual pc12+ and have done a/b with rew and just subjective listening. No doubt more tactile feel in those movies with LFE that goes down very low. While you will loose some output in the 20-40 and you can get more chuffing with a port plugged when running duals those issues are minimized.
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post #26493 of 26503 Old 09-21-2017, 06:32 AM
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Quote:
Originally Posted by Cyral View Post
I have two svs pc13u coming in tomorrow.

What port mode would you guys recommend? I guess I will need to run audyssey again after I change the port mode.

The room is about 4000 cubic feet and I like to listen between -10, 0 db.

Will measure it with REW.
Hi,

Just to reinforce what others have already said, I think that it's the <20Hz sounds and tactile sensations that most of us pay extra for with our subwoofers. And, the 16Hz mode will definitely offer you more of those. As noted above, the only real issue to consider will be whether you are pushing the subs so hard that there is some audible port chuffing in 16Hz mode. I think that will depend somewhat on placement, and especially on how far away you are from your subs.

Larger rooms do lose some gain, compared to smaller rooms, although you should still get pretty decent room gain <20Hz. But, an even bigger difference in room size may have to do with subwoofer placement. If you are reasonably close to your subs, you will obviously be able to achieve higher SPL at your listening position than if you are father away from the subs. I think that this is strictly a trial-and-error exercise to see what your subs will do, in your room, at your listening levels and preferred sub boost. But, if you can make the extended mode work well in your specific situation, I think that you will really like it.

Regards,
Mike
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post #26494 of 26503 Old 09-21-2017, 09:27 AM
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So just did a quick measurement with the 16 hz and the 20hz tune.

Purple 16 hz, blue 20hz.

What's your opinion about the curves? Tested at -10 db.

I did notice a slight chuff when playing the grenade scene in WWZ. Couldn't hear chuffing with WotW.
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post #26495 of 26503 Old 09-21-2017, 09:56 AM
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Quote:
Originally Posted by Cyral View Post
So just did a quick measurement with the 16 hz and the 20hz tune.

Purple 16 hz, blue 20hz.

What's your opinion about the curves? Tested at -10 db.

I did notice a slight chuff when playing the grenade scene in WWZ. Couldn't hear chuffing with WotW.
From the graph, I will take higher SPL at lower frequencies, every time. So, I would go with the purple 16Hz tune. But, the measurements don't really tell us much about preferred tuning frequencies in my opinion. It's much more a matter of what you can feel and what you can hear.

If you like the weightier sound and tactile feel of the low frequencies, and if you rarely hear any port chuffing, then I would go with the extended mode. That grenade scene is an unusually severe test. You will rarely encounter something like that, and if you do, it will probably be momentary. If you sailed through the pod emerging scene, which is also a severe test, then I would say that you are good to go.

Regards,
Mike
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post #26496 of 26503 Old 09-21-2017, 01:04 PM
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Quote:
Originally Posted by Cyral View Post
So just did a quick measurement with the 16 hz and the 20hz tune.

Purple 16 hz, blue 20hz.

What's your opinion about the curves? Tested at -10 db.

I did notice a slight chuff when playing the grenade scene in WWZ. Couldn't hear chuffing with WotW.
For rew sweeps try to display the division at 5db instead of 10.

As far as which to choose you need to do a few more sweeps at higher levels to see what you limits are in each tune.
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post #26497 of 26503 Old 09-21-2017, 01:51 PM
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Did some more tests. Looking for the max output.

I don't know if my curves are really useful, but I was doing some tests and increasing the master volume by 3db, till the volume wouldn't increase 3db anymore. The top curve (20hz, 16hz is max clean) is where there's compression, as there was not a clean 3db volume increase.

Is the output I get the max you can expect from these speakers?

( The red line in the 20hz output is -10, green is 0 )

Test is done in the MLP
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Last edited by Cyral; 09-21-2017 at 02:01 PM.
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post #26498 of 26503 Old 09-21-2017, 03:46 PM
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Quote:
Originally Posted by Cyral View Post
Did some more tests. Looking for the max output.

I don't know if my curves are really useful, but I was doing some tests and increasing the master volume by 3db, till the volume wouldn't increase 3db anymore. The top curve (20hz, 16hz is max clean) is where there's compression, as there was not a clean 3db volume increase.

Is the output I get the max you can expect from these speakers?

( The red line in the 20hz output is -10, green is 0 )

Test is done in the MLP
If the spl is correct then you have plenty to run the extended mode, the biggest issue now is dealing with your bass range peaks and valleys.
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post #26499 of 26503 Old 09-22-2017, 06:10 AM
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Yes, I indeed seem to have plenty of headroom.

Also tested Pulse, only noticed chuffing when running the subs +12 hot and playing at 0db.

The only thing I don't get is that many people said the 20hz mode has a lot more slam and impact, while having less tactile feel. But it seems the 16hz and the 20hz mode seem fairly even matched when playing 18hz+. Is the difference just exaggerated or was I expecting too much from the 20hz mode?
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post #26500 of 26503 Old 09-22-2017, 09:28 AM
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Quote:
Originally Posted by Cyral View Post
Yes, I indeed seem to have plenty of headroom.

Also tested Pulse, only noticed chuffing when running the subs +12 hot and playing at 0db.

The only thing I don't get is that many people said the 20hz mode has a lot more slam and impact, while having less tactile feel. But it seems the 16hz and the 20hz mode seem fairly even matched when playing 18hz+. Is the difference just exaggerated or was I expecting too much from the 20hz mode?
20hz vs 15hz is very movie dependent as not all movies even get down to 20hz with high output to make use of it let alone 15 hz which takes even more output to make it worth it.
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post #26501 of 26503 Old 09-22-2017, 09:51 AM
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20hz vs 15hz is very movie dependent as not all movies even get down to 20hz with high output to make use of it let alone 15 hz which takes even more output to make it worth it.
I was mostly talking about the curves I posted earlier.

In movies with bass below 20hz I notice the difference, like in WotW. But I heard people saying that 20hz mode has a lot of power/slam compared to the 16hz mode. I just don't notice the ''power'' in movies and also in my measurements. Maybe there would be a bigger difference in a bigger room..
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post #26502 of 26503 Old 09-22-2017, 10:34 AM
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Quote:
Originally Posted by Cyral View Post
I was mostly talking about the curves I posted earlier.

In movies with bass below 20hz I notice the difference, like in WotW. But I heard people saying that 20hz mode has a lot of power/slam compared to the 16hz mode. I just don't notice the ''power'' in movies and also in my measurements. Maybe there would be a bigger difference in a bigger room..
Oh ok, well the difference is the extra headroom that will allow for an increase in slam but you have to push the sub to the limits
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post #26503 of 26503 Old Yesterday, 09:27 PM
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Did a sweep in 10 hz mode and figured id post it if anyone wanted to see that tune
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