my Kappa build

[ParadigmDawg]

It should double the output of my sealed and my sealed is no lightweight. It is an Ultra crusher you know....

.....

 

[WmAx]

It should double the output of my sealed and my sealed is no lightweight. It is an Ultra crusher you know....

Well, the low bass ability will be doubled. The range of 16-25Hz for example, will have 2x output ability of the sealed, with range of 25Hz-30Hz having about 50% more output ability, and above 30Hz, the output of the sealed and vented units will be the same.

-Chris

 

[ParadigmDawg]

How do you think that will compare to an Ultra?

Well, the low bass ability will be doubled. The range of 16-25Hz for example, will have 2x output ability of the sealed, with range of 25Hz-30Hz having about 50% more output ability, and above 30Hz, the output of the sealed and vented units will be the same.

-Chris

 

[WmAx]

How do you think that will compare to an Ultra?

An Ultra can not even begin to compare to the sealed AXIS. The ported unit will make your room go insane with movie sound F/X LF effects, which primarily locate the LF effects in the range where the ported unit will enhance output. There will be little difference with most music, as music has most LF above 30Hz.

-Chris

 

[just-some-guy]

ok, i'm building the slots today. the original calls for 55". how is that measured ? inside curve or outside curve ?
and sinse my box is a little smaller, should i make it longer/shorter/same ?
30x25x18 outside.

thanx

 

[lsiberian]

ok, i'm "building the slots today. the original calls for 55". how is that measured ? inside curve or outside curve ?
and sinse my box is a little smaller, should i make it longer/shorter/same ?
30x25x18 outside.

thanx

It seems your box is about 2" bigger on one side than necessary.

You should tune to 22.5 hz IMO for this size box.

For the port size I use that would be a 27" x 3" x 11.50" of internal volume You can adjust the last two parameter in relation to each other,but I wouldn't vary the length more than an inch or two.

My reasons are

1. Simplicity in your box can port out the back.
2. Flat response to 20hz.
3. No EQ required (though very helpful and highly suggested)

You will need a high pass filter at 20hz(2nd order butters recommended).

A 300 watt amp would be sufficient for driving to 111db. However for a dual setup you may as well pick up an EP2500 or an Ep1500(sometimes cheaper)

Since you have a dual setup you can get around 114db. Though I suggest not pushing it that hard. As you will approach driver limits.

 

[WmAx]

It seems your box is about 2" bigger on one side than necessary.

You should tune to 22.5 hz IMO for this size box.

For the port size I use that would be a 27" x 3" x 11.50" of internal volume You can adjust the last two parameter in relation to each other,but I wouldn't vary the length more than an inch or two.

My reasons are

1. Simplicity in your box can port out the back.
2. Flat response to 20hz.
3. No EQ required (though very helpful and highly suggested)

You will need a high pass filter at 20hz(2nd order butters recommended).

A 300 watt amp would be sufficient for driving to 111db. However for a dual setup you may as well pick up an EP2500 or an Ep1500(sometimes cheaper)

Since you have a dual setup you can get around 114db. Though I suggest not pushing it that hard. As you will approach driver limits.

300W is very underpowered for the Kappa driver. It can easily take 1000W with no problem.

-Chris

 

[just-some-guy]

It seems your box is about 2" bigger on one side than necessary.

You should tune to 22.5 hz IMO for this size box.

For the port size I use that would be a 27" x 3" x 11.50" of internal volume You can adjust the last two parameter in relation to each other,but I wouldn't vary the length more than an inch or two.

My reasons are

1. Simplicity in your box can port out the back.
2. Flat response to 20hz.
3. No EQ required (though very helpful and highly suggested)

You will need a high pass filter at 20hz(2nd order butters recommended).

A 300 watt amp would be sufficient for driving to 111db. However for a dual setup you may as well pick up an EP2500 or an Ep1500(sometimes cheaper)

Since you have a dual setup you can get around 114db. Though I suggest not pushing it that hard. As you will approach driver limits.

are you saying i made the box too big ? my calculations show it a little smaller

no back porting. i want it aiming everything possible at me, not the building= neighbors.

a 27" port would be tons easier to build.

i'm getting a ep2500, reguardless. i think i will try it without eq, just for simplicity, for now.

 

[lsiberian]

300W is very underpowered for the Kappa driver. It can easily take 1000W with no problem.

-Chris

Of course

Though I would be concerned about over driving the 12.1 with 1000w.

 

[just-some-guy]

It seems your box is about 2" bigger on one side than necessary.

You should tune to 22.5 hz IMO for this size box.

For the port size I use that would be a 27" x 3" x 11.50" of internal volume You can adjust the last two parameter in relation to each other,but I wouldn't vary the length more than an inch or two.

again. my box is too big ? i would like to make them smaller, if that would help.

 

[WmAx]

Of course

Though I would be concerned about over driving the 12.1 with 1000w.

Not a concern either. I have the 2x Kappa Perfect 10.1 (10") on my computer monitors as the woofers. Powered by 650 RMS each, the amplifier clips before the speakers can be driven to their limits. It is an Ep2500 driven by a dedicated 20A circuit. However, I don't need any more power. I can reach about 120dB at the listening position with no significant distortion. I should point out this is only during tests. I listen at around 80dB SPL on average.

-Chris

 

[just-some-guy]

ok, i just did port calculations. 27x3x11.5 comes out to 931.
a 16.5x27x2.1 is 935. to do this, just one piece at 16.5x25 and a 2" up piece would get me the 930ish volumn.

am i off on this ?

 

[lsiberian]

ok, i just did port calculations. 27x3x11.5 comes out to 931.
a 16.5x27x2.1 is 935. to do this, just one piece at 16.5x25 and a 2" up piece would get me the 930ish volumn.

am i off on this ?

port calculations? I just did them for your. You need to use the long 27 x 3 x 11.5 the only adjustments you can make are between the 3 and 11.5 not the length.

To shorten you have to shrink the 3 x 11.5 cross section, but that will push the rear port air velocity fairly high.

 

[lsiberian]

Not a concern either. I have the 2x Kappa Perfect 10.1 (10") on my computer monitors as the woofers. Powered by 650 RMS each, the amplifier clips before the speakers can be driven to their limits. It is an Ep2500 driven by a dedicated 20A circuit. However, I don't need any more power. I can reach about 120dB at the listening position with no significant distortion. I should point out this is only during tests. I listen at around 80dB SPL on average.

-Chris

What type of enclosure does the 10.1 prefer?

 

[just-some-guy]

port calculations? I just did them for your. You need to use the long 27 x 3 x 11.5 the only adjustments you can make are between the 3 and 11.5 not the length.

To shorten you have to shrink the 3 x 11.5 cross section, but that will push the rear port air velocity fairly high.

thank you. yes, thats what i did. 27" remains the same. 3" changes to 2.1" and 11.5" changes to 16.5.
the 27 x 3 x 11.5 comes out to 931 ci. my 27 x 11.5 x 2.1 comes out to 935ci.
by my humble understanding , this is a good port to use, perhaps i am wrong.
numbers don't always tell the whole story. or maybe i just don't get it. idk.

and i still don't understand what you mean by "It seems your box is about 2" bigger on one side than necessary" . what side ?

anyway
yes, i will use gaskets. thanx for the shipping info. looking forward to getting them
zzounds is sending me a new ep2500
parts express is sending me fmods, xlr connectors, and other box stuff.

i hope to have them working this weekend. just 1 will be 2x more than i need, so 2 of them won't be pushed hard. i want very powerfull, that way, when i play them at less than very powerfull. i will know that they are very accurate.


also.
i want to thank you guys for your help. if i did this by myself, the results would not be nearly as good.

 

[WmAx]

What type of enclosure does the 10.1 prefer?

Ported. A 2.3 cubic foot cabinet plus a slot port that is 3" high, 9" wide and 60" long will give you -3dB point of about 21Hz.

-Chris

 

[just-some-guy]

ok. they are up and running. i was testing them with a crappy test disc = 20hz, 30hz, 40hz, 50hz, etc. they were setting in the middle of the room next to each other. 20hz was poor, but got better in the 30+ range.

i put em in they places. no testing done. watched Quantum Of Solace.
they didn't sound too bad. i could feel more bass, and is was cleaner (than my sub120).

3 issues :

hum. its not loud. can be heard during quiet scenes, but thats it.
fan. thats why towel is on the amp, it helped a little
amp signal. not enough of it. i had the pioneer maxed at 10+bd, and the amp all the way up.

so :
i am not claiming the drivers to be 100% = someone(forgot who) said they could have an overheating issue. but idk if i would even use em enough to get em hot.
i am still searching. but my solution to fixing the low level, and hum issues are yet to be found. though someone said that a ground wire from reciever to ep2500 fixed their hum. and someone else said the dcx2496 fixed the low signal issue. idk.
oh. these are far from being finished.

 

[sawzalot]

Very nice looking build there,Do you have an rca or any other plug from your cable box to your avr ,that was my initial hum soon as I unplugged the cable box dead silence.Your boxes look good what finish are you gonna put on them.Order the fan replacement its less than ten dollars and takes a few minutes to swap out the only overheating youll get is the 2500 with that towel over it ,please be careful.

 

[just-some-guy]

no cable box. that system is for BD only, and some audio.

i would like to do rosewood. but idk yet. that might be overkill.

where is this fan you speak of ?

thanx

 

[sawzalot]

no cable box. that system is for BD only, and some audio.

i would like to do rosewood. but idk yet. that might be overkill.

where is this fan you speak of ?

thanx

With out a link just look in search for fan modification it come up with the mod for the 2500 with a little how to do it and a link to order I ordered mine got it in three days.Quick question-What if the back of the driver is in fact touching the wrapped insulation will this cause problem with performance.I think mine just touches which would in fact block the hole in the mid q insert any thoughts before I laminate thanks..Sawz.
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