Improvment on the Infinity simple build....not yet!

[jboogie]

I built the Infinity Kappa perfect 12 simple build found on another forum site and it was good. The problem was that I powered it with a 300 WRMS plate amp AND I got the DVQ model. So, I thought that I would fix my new affinity for bass by swapping out the 12" for an IXL 15.2.2. That did a little but still left me wanting. Now I have swapped out the 300 watt plate amp for an OAudio 500 WRMS plate amp and am left still wanting. Something is wrong. The manual clearly states that only one RCA should be used from the LFE port, and I have done this. However, when 2 RCA's via a Y-jack are used there is a lot more output. The out put from the sub seems like it is thin, or missing something. It seems like it is not getting enough signal from the receiver. I have cheapy cheap 50 ft long RCA cable connecting the two. Could this be a problem?

Here is a quick description of the problem.

Transformers with the Infinity and 300 watt plate amp sounded better, deeper, and even created some wow moments.

Transformers with the IXL 15 and OAudio 500 plate amp seem to have less impact, lack of really deep stuff, and create NO wow moments.

By the way, I simply routed the hole larger in the same Infinity box to accomodate the larger sub. So, the box remains the same.

For those unfamiliar with the build it is a 3.95 ft3 (internal) box with a 12.5x3x61.95 in slot port tuned to 19.5hz.

What can I do to make this thing better!?

 

[Haoleb]

What can I do to make this thing better!?

Follow the original plans and use the specified equipment?

 

[Tulsajj]

You may check to make sure your polarity is correct and there are no air leaks.

Istead of using Y RCA to increase power received from your receiver, can you just adjust your gain on your reciever?

 

[lsiberian]

I built the Infinity Kappa perfect 12 simple build found on another forum site and it was good. The problem was that I powered it with a 300 WRMS plate amp AND I got the DVQ model. So, I thought that I would fix my new affinity for bass by swapping out the 12" for an IXL 15.2.2. That did a little but still left me wanting. Now I have swapped out the 300 watt plate amp for an OAudio 500 WRMS plate amp and am left still wanting. Something is wrong. The manual clearly states that only one RCA should be used from the LFE port, and I have done this. However, when 2 RCA's via a Y-jack are used there is a lot more output. The out put from the sub seems like it is thin, or missing something. It seems like it is not getting enough signal from the receiver. I have cheapy cheap 50 ft long RCA cable connecting the two. Could this be a problem?

Here is a quick description of the problem.

Transformers with the Infinity and 300 watt plate amp sounded better, deeper, and even created some wow moments.

Transformers with the IXL 15 and OAudio 500 plate amp seem to have less impact, lack of really deep stuff, and create NO wow moments.

By the way, I simply routed the hole larger in the same Infinity box to accomodate the larger sub. So, the box remains the same.

For those unfamiliar with the build it is a 3.95 ft3 (internal) box with a 12.5x3x61.95 in slot port tuned to 19.5hz.

What can I do to make this thing better!?

I will need far more details on your build to give you ideas, but it sounds like your build is full of compromises.

Still have you tried the sub in different locations?

It sounds like a room/placement issue. These are the most common sources of bass issues.

Still you shouldn't tune a sub below it's Fs parameter in most cases. And with an Fs of 23 you are pretty far below that on your tuning. As such I will suggest you immediately get an EQ of some kind for the sub and that you begin crawl testing it for a better location if possible.

 

[WmAx]

I built the Infinity Kappa perfect 12 simple build found on another forum site and it was good. [/quote[

So, this is not the avaserfi cabinet from THIS site? From your specs, it's a 'slightly' different cabinet, but very close.

The problem was that I powered it with a 300 WRMS plate amp AND I got the DVQ model.

Even if the cabinet was done right, this is VASTLY underpowered; the amp would be clipping like crazy before you ever hit any limits of the driver. And what kind of sealing gasket did you use for the driver and amp against the cabinet? For a ported cabinet, leaks can cause substantial performance degradation.

So, I thought that I would fix my new affinity for bass by swapping out the 12" for an IXL 15.2.2. That did a little but still left me wanting.

Did you model the new driver in the existing cabinet before this swap? Usually, you have to completely redesign a ported cabinet to use another driver in it.

-Chris

 

[jboogie]

I built the Infinity Kappa perfect 12 simple build found on another forum site and it was good. [/quote[

So, this is not the avaserfi cabinet from THIS site? From your specs, it's a 'slightly' different cabinet, but very close.

Sorry, yes it is the cabinet from this site!

Even if the cabinet was done right, this is VASTLY underpowered; the amp would be clipping like crazy before you ever hit any limits of the driver. And what kind of sealing gasket did you use for the driver and amp against the cabinet? For a ported cabinet, leaks can cause substantial performance degradation.

You got me...I did not use a gasket to seal the driver, only hurricane bolts. Also, I did not realize that leaks could be such a large factor on a ported enclosure.


Did you model the new driver in the existing cabinet before this swap? Usually, you have to completely redesign a ported cabinet to use another driver in it.

-Chris

Yes, I did model it before I put the new driver in the cabinet. If you reduce the length of the port by some 20 inches or so, it models nicely.

I have plans to build an entirely new cabinet, but got anxious and decided that a little time with the router would be worth the effort to see the differences.

Thanks for the help. I will post the plans for the new cabinet for you guys to take a look at before I build it as not to be dissapointed again!