Kappa build vs. Pb10 or 12

[Tulsajj]

Ok, I have decided to go w/ this build and I have ordered me a Kappa 12vq. I'm only going to build 1 sub, that all I have room for. Also, the DCX 2496 is not in the budget so I'm going to do without it for now. I'm trying to put a parts list together from going through the forms so this is what I have so far but have a few questions:

Kappa 12vq
3/4 Birch Ply
EP 2500
Rock Wool

From PE:
XLR to RCA Adapter (should the XLR be male or female?)
Feet
Binding Post
What kinda of low crossover?
Do I need a high crossover?

Do you have any other suggestions? Thanks!

 

[lsiberian]

Ok, I have decided to go w/ this build and I have ordered me a Kappa 12vq. I'm only going to build 1 sub, that all I have room for. Also, the DCX 2496 is not in the budget so I'm going to do without it for now. I'm trying to put a parts list together from going through the forms so this is what I have so far but have a few questions:

Kappa 12vq
3/4 Birch Ply
EP 2500
Rock Wool

From PE:
XLR to RCA Adapter (should the XLR be male or female?)
Feet
Binding Post
What kinda of low crossover?
Do I need a high crossover?

Do you have any other suggestions? Thanks!

I suggest a sub dude for it to sit on. It's worth the money to decouple this sub from your floor.

You seemed very confused about the details..

For a high pass filter I suggest the Elemental Designs http://www.edesignaudio.com/product_info.php?cPath=2_123&products_id=657 or the Reckhorn B-1 http://www.reckhorn.com/index.php?ln=en&prod=b1

The B-1 is supposed to boost voltage, but I still like the idea of having the EQ of the ED.

About the EP2500. I don't suggest it for a single Kappa build.
The kappa never goes below 4ohms in modeling. So you only need a 4ohm stable amp. If you plan to add a DCX2496 later then you will want a pro amp with XLR inputs most likely. If not then you have some choices. I suggest a thorough search of Craigslist for great deals. Crown, QSC, Yamaha Pro Amps, Alesis, and Behringer all can be found used sometimes for a great price.

Another option is the O-Audio Bash amp which includes the subsonic filter and some boosting features.

Since you're on a budget I will suggest you look for a 12.1 sub. It's very comparable and Ebay's for around 100 dollars. I've found them on craigslist for 80 before. Maybe with that extra 100 you could swing the DXC2496.

If you want this to be a cheap project. There are ways to save.

Even a 12.1 built in an MDF version of this box powered by an O-Audio bash amp would outperform any sub I've heard or seen under 1000 dollars(exception Matt34s sale)

Just make sure you use the rock wool, bracing, port and an Infinity Perfect driver. Both are variable.

 

[Tulsajj]

For a high pass filter I suggest the Elemental Designs http://www.edesignaudio.com/product_info.php?cPath=2_123&products_id=657 or the Reckhorn B-1 http://www.reckhorn.com/index.php?ln=en&prod=b1

So can I not just get to inline filters, one for low (anything below 20hz and a high anything above 100hz)?

About the EP2500. I don't suggest it for a single Kappa build.
The kappa never goes below 4ohms in modeling. So you only need a 4ohm stable amp. If you plan to add a DCX2496 later then you will want a pro amp with XLR inputs most likely. If not then you have some choices. I suggest a thorough search of Craigslist for great deals. Crown, QSC, Yamaha Pro Amps, Alesis, and Behringer all can be found used sometimes for a great price.

Ok, will start searching ebay and CL for a pro amp, but I'm still going to need XLR to RCA adapters to go from my receiver to amp, correct?

Another option is the O-Audio Bash amp which includes the subsonic filter and some boosting features.

I don't want to use plate amp unless I can build that in, I don't want a seperate box for it.

Since you're on a budget I will suggest you look for a 12.1 sub. It's very comparable and Ebay's for around 100 dollars. I've found them on craigslist for 80 before. Maybe with that extra 100 you could swing the DXC2496.

Already purchased the 12vq

 

[lsiberian]

If you can't find one on ebay for a decent price I heard the Shiva-x might work in the kappa enclosure. There is a thread on it somewhere over on the Hometheatershack website.

I have modeled the Shiva-X in the box mentioned and it is comparable in modeling to the 12VQ. I doubt it's as good of a driver though. The Perfect's are insanely good drivers.

A better 12" driver would be the audiopulse/TC Sounds line. But you will pay more for it generally.

 

[Tulsajj]

Where can you buy the O Audio 500 watt bash amp? Is it the same one that is on PE?

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=300-752

Also, if I used this I wouldn't need to worry about any crossovers. Can you think of any way of building this into the box itself?

 

[lsiberian]

So can I not just get to inline filters, one for low (anything below 20hz and a high anything above 100hz)?

Ok, will start searching ebay and CL for a pro amp, but I'm still going to need XLR to RCA adapters to go from my receiver to amp, correct?

This will not work. The filters are 1st order each and I'm still not a big fan of them because I've heard they aren't always effective. A Reckhorn or the ED gives you a lot more control.

You don't need a 100hz filter your receiver will do that.

You may not. Some amps take RCA depends on what you find.

 

[sawzalot]

Where can you buy the O Audio 500 watt bash amp? Is it the same one that is on PE?

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=300-752

Also, if I used this I wouldn't need to worry about any crossovers. Can you think of any way of building this into the box itself?

I suggested this before, just build the box as per the design then build another box to accept the plate amp and attach it to the back of the sub box center it up and no one will know the better.

 

[Tulsajj]

My kappa will be here Thursday..

I guess I could build a seperate box for the amp, but how much airspace is needed to let that amp breath?



Is the O Audio the same as the bash amp on PE?

How much power am I losing by going w/ the bash rather than the EP 2500?

 

[lsiberian]

My kappa will be here Thursday..

I guess I could build a seperate box for the amp, but how much airspace is needed to let that amp breath?



Is the O Audio the same as the bash amp on PE?

How much power am I losing by going w/ the bash rather than the EP 2500?

no it isn't the O-Audio is a better amp with more options and features.

You won't need more than the O-Audio provides for a single Kappa, but if you prefer the EP2500 then you can get one. Just make sure to get a reckhorn.

 

[Tulsajj]

Ok, I will order the OAudio amp then. Thanks for everyones help and input!

 

[Haoleb]

no it isn't the O-Audio is a better amp with more options and features.

You won't need more than the O-Audio provides for a single Kappa, but if you prefer the EP2500 then you can get one. Just make sure to get a reckhorn.

I'm not so sure about that...

At times I am using nearly all the power my amps can provide with the line voltage I can maintain at high volume's. They are rated at 1.4KW each into a 4 ohm load.

 

[lsiberian]

I'm not so sure about that...

At times I am using nearly all the power my amps can provide with the line voltage I can maintain at high volume's. They are rated at 1.4KW each into a 4 ohm load.

problem is that he couldn't afford the high pass filter and all the other stuff to go with it. Plus he's in a small room so I don't think he'll have a problem.

Just because it's rated that high doesn't mean I suggest pushing it with that many watts. Now if you high pass it higher than you can really get it going.

Still my suggestion is based on the price, room and simplicity requirements. While he may not have the dynamic headroom you get he'lll still get a lot of volume.

 

[WmAx]

Haloeb is correct - the Kappas can take massive power without compression or distortion. Even on my computer system, using 10" Kappa Perfects, powered by 650RMS each, I can easily clip the amp before I exceed the capability of the drivers. Avaserfi tested a single Kappa 12 VQ with 2000 watts to get the maximum SPL output of 120dB from a single unit at the listening position. They are robust drivers.

But the O Audio 500 amp is sufficient for common use.

-Chris

 

[Tulsajj]

What type of spl should I expect w/ the O Audio Amp and the kappa?

Can I turn the amp all the way and not worry about damaging the speaker?