Mixed subs for 2 sub setup

[FNG212]

If you use more than 1 sub in a given setup do they need to be the same sub, like 2 Kappa builds or can you have, for example, 1 Kappa mixed with an SVS PB-13 ultra? I would imagine those are very different subs all the way around and with different tuning freqs.

Thanks

 

[Adam]

I recall one or two threads on that topic, so you might be able to find some good reading around here on that. There's also this article from the main AH website under "Tips & Tricks" and "Get Good Bass" - it mentions selecting subwoofers for multi-sub set ups.

 

[lsiberian]

If you use more than 1 sub in a given setup do they need to be the same sub, like 2 Kappa builds or can you have, for example, 1 Kappa mixed with an SVS PB-13 ultra? I would imagine those are very different subs all the way around and with different tuning freqs.

Thanks

1 Kappa is enough for most setups IMO, but 2 is taking things to another level. The 13 Ultra can be sold on audigon probably for over 1000 dollars. That's enough to buy a pair of Audiopulse Axis 12" drivers. Which can be put in a smaller box than the Kappa's with more output.

A single 12" Axis can output out around 118db around 20hz in a properly tuned folded slot port in a 2.5cuft box.

I believe the Kappa is around 112db in a 4.0 cuft box tuned properly.

 

[bandphan]

I currently do(untill the new twins get here), but with an external crossover. It took a couple of days to get it to work well after numerous adjustments. It wasnt done to add spl, but tame room issues.

 

[FNG212]

Thanks guys.

The reason I ask is because I've started the box construction for the Kappa, just need to wait on funds for the driver, amp, dxc2498. But I already have my eye on the next build, which is a 15" down firing design. http://www.hometheatershack.com/forums/soundsplinter/1676-rl-p-15-project-pics.html

I really like the specs on the audiopulse drivers but haven't really seen any builds on them and wouldn't know what to do with them.

Are there any Axis 12/15 builds out there?

 

[lsiberian]

Thanks guys.

The reason I ask is because I've started the box construction for the Kappa, just need to wait on funds for the driver, amp, dxc2498. But I already have my eye on the next build, which is a 15" down firing design. http://www.hometheatershack.com/forums/soundsplinter/1676-rl-p-15-project-pics.html

I really like the specs on the audiopulse drivers but haven't really seen any builds on them and wouldn't know what to do with them.

Are there any Axis 12/15 builds out there?

Sure are. PDawg has one and you got Wmax here to edumucate you if necessary.

Your underestimating the Kappa if your already planning on something else. Have you even heard this sub.

If properly set up and driven the thing will rattle your house.

If you must upgrade the JL Audio 12w7 is great in that box.

 

[WmAx]

Sure are. PDawg has one and you got Wmax here to edumucate you if necessary.

Your underestimating the Kappa if your already planning on something else. Have you even heard this sub.

If properly set up and driven the thing will rattle your house.

If you must upgrade the JL Audio 12w7 is great in that box.

As a critical note: the upgrade to a 12w7 from the Kappa Perfect is not an upgrade in build quality or sound quality. Both will have nearly identical SQ and build quality. The 12w7 simply allows more SPL without loss of SQ. You can get nearly twice the output from the 12w7 as compared to the Kappa Perfect, which already has substantial output exceeding most commercial subwoofers.

-Chris

 

[sawzalot]

As a critical note: the upgrade to a 12w7 from the Kappa Perfect is not an upgrade in build quality or sound quality. Both will have nearly identical SQ and build quality. The 12w7 simply allows more SPL without loss of SQ. You can get nearly twice the output from the 12w7 as compared to the Kappa Perfect, which already has substantial output exceeding most commercial subwoofers.

-Chris

So in your opinion is this an upgrade only to be noticed with meters and such, not really distinguishable by the human ear alone.Which may really be an uneeded updrade by most average HT'ers.

 

[ParadigmDawg]

Are there any Axis 12/15 builds out there?

Here is my 15" AXIS in a sealed box.

I also have the plans for turning it into a monster ported sub but I have not acted on that yet. Chris did the spec/build sheet and I have a cabinet maker ready at any time to start the build.

 

[Matt34]

So in your opinion is this an upgrade only to be noticed with meters and such, not really distinguishable by the human ear alone.Which may really be an uneeded updrade by most average HT'ers.

It's an upgrade in only SPL and maybe a bit more extension(not sure if you use the same enclosure). Basically if you only think the Kappa's are not giving you enough output then it would be considered an upgrade.

 

[lsiberian]

As a critical note: the upgrade to a 12w7 from the Kappa Perfect is not an upgrade in build quality or sound quality. Both will have nearly identical SQ and build quality. The 12w7 simply allows more SPL without loss of SQ. You can get nearly twice the output from the 12w7 as compared to the Kappa Perfect, which already has substantial output exceeding most commercial subwoofers.

-Chris

Excellent point. You need to really hear the Kappa and feel it to understand it's power. This is no ordinary 12" sub it will rattle many peoples homes and give that true theater experience. 110db is far above reference and most listening volumes. I listen around 65-75db So to give you an idea that 16times the volume theoretically. and about 128 times the volume that I practically listen at.

that's about twice as loud as a jack hammer a meter away. http://en.wikipedia.org/wiki/Sound_pressure_level

And about half as loud as a rock concert. But consider that this is in your confined house not a rock concert venue which is typically very large. Once you factor in room gain and room size you are talking rock concert like volumes.

 

[sawzalot]

Hey Dawg are you building that box ?

I mean the one posted with the clamps and such.

 

[ParadigmDawg]

Naw, that's the one I have now, Andrew built it for me. The ported AXIS is on hold until I figure out the pool thing.

Hey Dawg are you building that box ?

I mean the one posted with the clamps and such.

 

[FNG212]

Thanks for the responses. It's not that I won't be happy with the Kappa, I'm sure I will be. Its just that I really like the building process and want to keep building stuff.

My question was more along the lines of "will it work". I just wanted to know what the schools of thought were on mixed subs. I'm still going to build it and see how it works, if I don't like it I will sell one, or apply it else where.

What are the plans for the ported Axis 15? That sounds really interesting.

Is that a black stain over wood grain or a veneer?

 

[ParadigmDawg]

The ported AXIS is a 48"x24"x26" folded slot ported bad boy.....

The one in the picture is just black paint over wood veneer.

 

[jaejw1]

Thanks for the responses. It's not that I won't be happy with the Kappa, I'm sure I will be. Its just that I really like the building process and want to keep building stuff.

My question was more along the lines of "will it work". I just wanted to know what the schools of thought were on mixed subs.

your answer was provided in the link in the first page..
Mixing different subs will also reduce the success of canceling out room resonances since they will exhibit different amplitude and phase responses. Always select two well designed subwoofers (preferably the same) that are each in their own capable of filling your theater room with ample bass without bottoming out or running out of gas. If you can’t afford two subwoofers at the moment, buy one quality sub for now and add a similar capable one down the road when you’ve got the cash.

here is some more reading
http://forum.blu-ray.com/showpost.php?p=843868&postcount=2

 

[lsiberian]

Thanks for the responses. It's not that I won't be happy with the Kappa, I'm sure I will be. Its just that I really like the building process and want to keep building stuff.

My question was more along the lines of "will it work". I just wanted to know what the schools of thought were on mixed subs. I'm still going to build it and see how it works, if I don't like it I will sell one, or apply it else where.

What are the plans for the ported Axis 15? That sounds really interesting.

Is that a black stain over wood grain or a veneer?

Then build new speakers! It's a lot of fun. You got TLS, and Wmax here to school you like they schooled me on this stuff. I've got most of the concepts of Wmax's acoustically inert boxes. So if you got questions ask away.