which 5" unit to fountek jp3.0 ribbon

[wuffer]

i cant decide wich unit i should use for my next project...
i have looked at peerles sds/hds.. vifa and seas..
it going to be 2 units and the ribbon in the middle
any good ideas??

 

[Snickers-is]

The CA15RLY is my personal favourite. Use slightly larger cabinets than recommended by Seas. I have used as large as 17,5 litres vented pr driver, but that may make the drivers a bit unstable if you use "only" two drivers.

 

[wuffer]

yes i have looked at that unit... im going to supply with a sub or 2

 

[Snickers-is]

I am using 4 pcs of the L15RLY on each side, but have tried the setup with CA15 too. Those two are quite similar in the bass region. It does definately not need a subwoofer.

 

[wuffer]

thanks.. but im going for only 2 units in D'Apolitto design.. and then i decide if im going to use a sub or not...

by the way. how about ribbons and active xo?? is it possible??

 

[planet10]

Jordan JX92 or CSS WR125....

dave

 

[wuffer]

Jordan JX92 or CSS WR125

i dont now those units.. where can i get them and why should i pick those???

 

[planet10]

http://www.creativesound.ca/details.php?model=WR125ST

http://www.ejjordan.co.uk/drivers/jx92.html

An externally hosted image should be here but it was not working when we last tested it.

dave

 

[wuffer]

thanks.. i like the jordan but i dont wanna use 700 euro on 4 units..

 

[planet10]

Except for the top end (and giving up 1.5 dB in sensitivity) the CSS is a stiff competitor to the Jordan and at $280 USD for 4 a whole lot more cost effective.

dave

 

[wuffer]

the seas is the best offer for me... that i can get here in denmark.. but im still open for suggestions

 

[Snickers-is]

I recomment you to not run an active filter on a true ribbon. I have tried it myself on my meassuring amplifier and that did not go so well, even without signal input. (A Cambridge P500). It was on an Aurum Cantus G3Si. The ribbon flexed into the grille on the tweeter and lost its saw tooth shape.

 

[wuffer]

thanks.. then i must learn a little more about crossovers before i do something...

any links i should look at???

 

[AJ]

wuffer,

I've been using an active XO with a Fountek JP2 tweeter with no problems at all. I have a ~25mf series cap on them to block any DC and low frequencies. You just need to take precautions and don't try to cross them too low.

 

[wuffer]

okay can you explain where to put those caps??
how is the fountek jp2.0 i can se i can get it at the local pusher for about 90$ more for both..

i was thinking of the active xo from lcaudio..

http://lcaudio.com/index.php?page=13

 

[AJ]

wuffer,

Just place the cap somewhere between the amp and the driver in the positive (red) wire of your speaker cable. I'm listening to them in a temporary setup with an Audax PR170M0 driver on a narrow open baffle, so it's easy to just plug it in. If you're building a real box, you'd probably want to put it inside.

An externally hosted image should be here but it was not working when we last tested it.

How are the JP2's? I love 'em! I have a pair of JP3's as well and I like the JP2 much more. It's quite effortless and very, very smooth. For the price, it's a great tweeter.

 

[wuffer]

thanks.. the jp2.0 looks great.. maybe i should give it a listen...

 

[Snickers-is]

Then maybe you should also look at the NeoCD 2. It has a slightly heavier ribbon, but it can take much more power and the impedance peak should not be of any problem with active cross over.

The capacitor must be in series with the tweeter like a first order passive cross over. Make sure to have it large enough so you do not have any phase distortion within an octave or two from the cross over frequency.

 

[wuffer]

okay.. its just a little more expensive than the jp2.0..
maybe i should just make the passive xo.. im just a beginner dont wanne smoke the tweeter first time i turn on the music

 

[dkxdn]

Has any one listen to the Fountek JP2.0 agains the new NeoCD2.0 ?