NXT.......rubbish??....THINK AGAIN!

tino84 · « **Reply #1620 on:** 17 Feb 2012, 09:01 am »

Quote from: zygadr

The way I see it is that we MUST mount the above exciter (no choice anyway due to its very heavy weight)to a back spline or supporting brace and then attach the panel to the array of exciter feet.
This way there will be no added mass to the panel and the exciter's voice coil will not be under strain providing the panel is supported in a frame of some sort.

do you mean a way like this?

http://imageshack.us/photo/my-images/408/1002513w.jpg/

http://imageshack.us/photo/my-images/837/1002514p.jpg/

zygadr · « **Reply #1621 on:** 22 Feb 2012, 01:27 am »

Sort of.............but vertical.

tino84 · « **Reply #1622 on:** 3 Mar 2012, 01:36 am »

so, I don't know if any of you is listening some metal.

this kind of music has a problem: compression.

f.e:

http://i43.servimg.com/u/f43/17/03/84/13/clip_a10.png

this "thing" causes NXT to clipping sometimes.

does anybody had have the same problem?

doug s. · « **Reply #1623 on:** 3 Mar 2012, 02:25 am »

Quote from: tino84 on 3 Mar 2012, 01:36 am

so, I don't know if any of you is listening some metal.

this kind of music has a problem: compression.

f.e:

http://i43.servimg.com/u/f43/17/03/84/13/clip_a10.png

this "thing" causes NXT to clipping sometimes.

does anybody had have the same problem?

that kind of "music" has a lot more problems than compression, imo!

for compression - dynamic range expanders - makes the soft passages softer; the loud passages louder. best installed in a preamp tape loop, so as to be out of the signal path when not in use:

doug s.

zygadr · « **Reply #1624 on:** 6 Mar 2012, 04:03 am »

I don't listen to ''metal''. My taste lies in classical, jazz and some occasional percussion.

ALL of the above will cause NXT and even normal speakers to clip if you attempt to playback anywhere near ''realistic'' listening levels.

Hi powered P.A. speaker bins and megawatt amplifiers do a better job at avoiding this problem, but the''WAF'' usually won't accomodate beasts like that

tino84 · « **Reply #1625 on:** 11 Mar 2012, 01:52 am »

but NXT in my case, clip not near realistic listenings level, but lower.

my previous wharfedale didn't clip at the same recording, so I wanna to be sure if it is a material matter, a technolgy matter or recording matter. (and now, if something like a behringer mdx would help or not)

DDT · « **Reply #1626 on:** 30 Mar 2012, 09:32 am »

Recently I heard this kind of speakers and I want one for myself.
Can I build exciter motor, is there any blueprints?
Anyone build exciter with parts salvaged from classical speaker?
Is there a plan for building from scratch?

space2world · « **Reply #1627 on:** 17 Apr 2012, 09:10 am »

Hello guys,
I am very interested in using these exciters for speakers.
But this times its very hard to get the HIAX25C15-8/SF so
I am sking you what are you using for the exciters?

Thanks.

tino84 · « **Reply #1628 on:** 18 Apr 2012, 10:23 am »

you can try here

http://www.sietrade.com/shop.asp

this italian reseller is also signed in another forum, and he told us that nxt from parts-express are NOT original- NXT (a sort of clones).
(this won't mean they don't sound good you know, but they aren't signed as NXT )

space2world · « **Reply #1629 on:** 18 Apr 2012, 11:01 am »

Funny, this Italian seller is selling also HIWAVE exciters the same
as parts express!!! By the way the top off the line model HIAX25C15-8/SF is only
available in huge quantities by custom order and four times less expensive then on the list of
this Italian seller. 158EUR for one exciter is a little too heavy...

So he is saying that parts express sells HIWAVE products that are not NXT licensed
and he does sell HIWAVE whit NXT license. Thats rubbish.....

I just want to know which one do you use? HIWAVE,....???

space2world · « **Reply #1630 on:** 19 Apr 2012, 04:48 pm »

NXT === HIWAVE

Has someone tried the HIAX25C10-8/HS exciter.
I am puzzling how much less efficient this one is in comparison to the HIAX25C15-8/SF model.
What would you say if I used 9 of them for one panel 200cm x 60cm, would that be 90dB????

tino84 · « **Reply #1631 on:** 21 Apr 2012, 08:39 am »

I was talking about those:

http://www.pov.us/myuploads/white-exciters.jpg

that I see PE doesn't sell anymore. those are NXT clones.

I don't know where you live. perhaps,if you live in UK, you'd better buy from PE.
but if you live in EU, considering shipping and Tax, I think would be better buying from sietrade.

so, where do you get from PE the HIAX25C15-8/SF. I've seen it sold only from sietrade, and I cannot find it in PE catalog

space2world · « **Reply #1632 on:** 21 Apr 2012, 11:21 am »

""I don't know where you live. perhaps,if you live in UK, you'd better buy from PE.
but if you live in EU, considering shipping and Tax, I think would be better buying from sietrade.

so, where do you get from PE the HIAX25C15-8/SF. I've seen it sold only from sietrade, and I cannot find it in PE catalog""

I dont want to make bad advertising for sietrade but
if you take for example:
1 HIAX25C10-8/HS from parts express the price is around 14USD + shipping = Total + VAT in your country for EU
1 HIAX25C10-8/HS from sietrade 27,45 EUR + Italian VAT 23% = 33,7EUR + shipping

You can see that we have a monopoly position of sietrade here in EU...Of course they need to
make profit, you get an idea how much are the profit rates in Audio industry..3 times and more...

I will stick whit parts express, they have more reasonable prices...

Parts express doesnt sell the HIAX25C15-8/SF and never did. I contacted them and they said that they will maybe do in future. But I think they wont sell in for more then 100USD. Thats just a logical guess.

By the way has someone used the HIAX25C15-8/SF exciter???
I would really like to know the efficiency comparison and sound wise to other less expensive exciters.

tino84 · « **Reply #1633 on:** 21 Apr 2012, 11:36 am »

asking again: where do you live?

because living in Italy, if you want to buy something from PE, you have to buy 50$ and pay about 50$ shipping cost + 23% VAT at the end.
so, if you have to buy only one or two pieces, better take a look also at sietrade (or other, maybe better ask to hiwave about reseller).

I also have bought from PE (exactly 17couples of nxt-clones

), was all perfect. but If I ain't got 120€ (at least) to spend, I can buy cheaper hi-wave from sietrade (there are some for about 15€). it's up on what you need, doesn't it?

so, thanks for advice about hiax25c15-8/SF. I'll wait some news from PE about their price

space2world · « **Reply #1634 on:** 21 Apr 2012, 02:48 pm »

I am from Slovenia EU....
This is still cheaper from parts express...

Yes, I hope PE will sell this wonders someday.
If podium sound uses 5 of them for 91dB then 9 of them will make 94-95,
this you can power whit any amp.

But the interesting question is how well the little brother performs in
terms of efficiency. If you compare their data sheets you see they are comparable.
Force factor is 1/3 lower then found on HIAX25C15-8/SF and resonance freq. is 200 against 400.

Is there anything new Mr. Ziggy from your panels? Which exciters do you use? What amplifier do you use?

Thank you..

tino84 · « **Reply #1635 on:** 21 Apr 2012, 06:14 pm »

yes, would be interesting know how much different are those exciter. 94-95db would be great, as I think that db is the only weak point of NXT tech against "normal" AP.

if you live around NovaGorica, I can make you hear an exciter, as I live in Gorizia

space2world · « **Reply #1636 on:** 21 Apr 2012, 08:05 pm »

No, I dont leave near Goriza but I was a couple of times there....nice place.
I can hear the podiums in Ljubljana. There is a guy who sells them. But would
gladly hear yours too, when I will drive around Nova Gorica I drop by.)

If parts express wont sell them, maybe we can arrange a group buy.
We would need a bit more than 100-150 people for that action...
If there is enough interested maybe there can be done something.
The price would be best we can get. Direct from fabric.

el`Ol · « **Reply #1637 on:** 23 Apr 2012, 10:33 am »

They say the 1/8" of this stuff is "unformable",
http://www.taskboard.com/store.html
so it could keep its shape good enough for a DML speaker.
For this price it would be no problem for someone in the US to try.

space2world · « **Reply #1638 on:** 24 Apr 2012, 07:32 am »

""They say the 1/8" of this stuff is "unformable",
http://www.taskboard.com/store.html
so it could keep its shape good enough for a DML speaker.
For this price it would be no problem for someone in the US to try.""

Interesting. Is this plastic or??? I would like to know how heavy it is?

el`Ol · « **Reply #1639 on:** 25 Apr 2012, 08:41 am »

Quote from: space2world on 24 Apr 2012, 07:32 am

Interesting. Is this plastic or??? I would like to know how heavy it is?

They just say it is wood fiber and it is light.