2 way dappolito with scan-speak drivers

[aries]

Hi,
like my past post suggest,i'm tihnking to build a spekaer with scan-speak drivers.
the candidates for woofer are :

- 18w8545-00
- 18w8545-k
- 18w8546

the candidate for tw is :

- d9900 revelator

it must be in dappolito configuration.
the loudspeaker must be 2 way and 3 speakers (the 2 wf crossed at the same
frequency with the tw).
this is an idea for this project.....i'm thinking about it.
someboby of you does projected a think like this with the speakers i mentioned ?
some project in web already done ?
please advise me.

thank you
regards

[aries]

Hi,
like my past post suggest,i'm tihnking to build a spekaer with scan-speak drivers.
the candidates for woofer are :

- 18w8545-00
- 18w8545-k
- 18w8546

the candidate for tw is :

- d9900 revelator

it must be in dappolito configuration.
the loudspeaker must be 2 way and 3 speakers (the 2 wf crossed at the same
frequency with the tw).
this is an idea for this project.....i'm thinking about it.
someboby of you does projected a think like this with the speakers i mentioned ?
some project in web already done ?,like this : http://www.audioxpress.com/reviews/media/AX301FL.pdf
please advise me.

thank you
regards

[Kraniet]

why do u want those drivers? any particular reason?

[Kraniet]

for example you could use SEAS CA18RLY instead i think its a better choice. in any case u should think about using the SS 9700 instead of 9900

[aries]

i like scan driver and i prefer to go with they,thank pyu.

[Martin]

SS9900 has slightly better dispersion characteristics at lower frequencies making it easier to integrate to a midbass unit.

I agree with Kraniet that CA18RLY seems a better candidate though.

[Kraniet]

ok well u could check out this project by Morello here in the forum. not a dappolito but he uses 8545 and 9700. im no big fan of the 8545 due to the highfreq breakups. as bass-drivers they do sound really good tough.. the material for the cone do leave some things to wish for when it comes to high freq..
the 8546 is something ive been interesten in for a while but i dont know.. i think the best ss bass/mid may be the sliced cone versions. only thing with them is that they have parabolic shped cones wich can be a problem when it comes to bass reproduction.

[Kraniet]

if u want something more "high tech" than CA18RLY then maybe the seas W18NX001 it seems to be the excel version and should have many of the good char from the CA18RLY but with better motor system etc..

i thing to remember though is that not all things that are high tech is high tech.. price dont tell if its good or not..

[dawen]

not all things that are high tech is high tech

Du får gärna utveckla det här

[Kraniet]

not all things that are high tech is high tech

Du får gärna utveckla det här

ok what i mean is that price dont always tell if its good or bad. many things in this world of HiFi that is branded as "high tech" simply are not.

scan speak do make good drivers and the SD-system is a good magnet system that produces low distorsion. but seas drivers a in many cases just as good and some even better i should think.

but this isnt really interesting when mauro isnt interested in other drivers than SS.

edit: i should say though that the scan speak tweeters are very good. the bass-drivers are a little pricy though in my opinion..

[aries]

an example of the speaker in speaaking is http://www.audioxpress.com/reviews/media/AX301FL.pdf

[Kraniet]

cant get that link to work

[Kraniet]

can say that ive had the same ideas a couple of years ago, to use 8545 and 9700 that is, for av dappolito. i bought the drivers but didnt really like them that much and i really didnt like what they did to my economy since then ive realized that u can get pretty much the same sound from other drivers.. theres alot to gain from "easy" drivers with nice freq-curves. with the right driver half the job is kind of done..

did get that pdf down ill have a look..

[aries]

http://www.audioxpress.com/reviews/media/AX301FL.pdf


is ok,i have no problem to donwload it.
try to search it on www.google.com , digit "mtm-18 loudspeaker kit"

bye

[Kraniet]

ok now ive read it.. seems like a good design with some flaws though. maybe a bigger box would be good. i would move the ports to above/below the tweeter (adding bracing to the box). then of course i would think of some other woofers.. for midrange i belive the 8545 is better than the k version (with its kapton voice-coil its more suited for bass) but still i would think of some other woofer. 8546 perhaps or some of the sliced cones. maybe the 15W/8530K00 is of interest? i think that is a much better choice for midrange. they sound really good and the low sens(85.5db) should be so much problem in a mtm.

[aries]

yes but there are not the values of crossover components!!

help....

[Piotr]

ok well u could check out this project by Morello here in the forum. not a dappolito but he uses 8545 and 9700. im no big fan of the 8545 due to the highfreq breakups. as bass-drivers they do sound really good tough.. the material for the cone do leave some things to wish for when it comes to high freq..
the 8546 is something ive been interesten in for a while but i dont know.. i think the best ss bass/mid may be the sliced cone versions. only thing with them is that they have parabolic shped cones wich can be a problem when it comes to bass reproduction.

Kraniet,

what is it that makes you feel that a parabolic cone is no good for low frequency duty?

/Peter

[Kraniet]

ok well u could check out this project by Morello here in the forum. not a dappolito but he uses 8545 and 9700. im no big fan of the 8545 due to the highfreq breakups. as bass-drivers they do sound really good tough.. the material for the cone do leave some things to wish for when it comes to high freq..
the 8546 is something ive been interesten in for a while but i dont know.. i think the best ss bass/mid may be the sliced cone versions. only thing with them is that they have parabolic shped cones wich can be a problem when it comes to bass reproduction.

Kraniet,

what is it that makes you feel that a parabolic cone is no good for low frequency duty?

/Peter

the cone is automaticly less rigid when its in that form. så u should expect more flexing when playing bass. a straight cone is much more rigid. a parabolic shape do tend to give smoother high freq though..

[paa]

Some info about the 717 MTM speaker:
http://www.radagast.org/~dplatt/speakers/
http://www.radagast.org/~dplatt/speakers/techdocs.html

[Kraniet]

yes maybe you could build according to this..



Cabinet: 7.5"x20"x21" (approx)

[aries]

i already know it.....but i want to compare with other projects.

[Kraniet]

have you tried asking in http://www.diyaudio.com/ ?
another swedish forum is HifiForum where you might have some luck.
in any case i would rather build with 15W/8530K00 for better midrange sound if i were to use scan speak at all that is.

[aries]

yes i heve asked there but nothing to do...........
i'm searching for a d'appolito with two 17cm scan and one revelator tw.

thank you

[paa]

Have you seen these too:
http://www.northcreekmusic.com/NorthCreekKits.html

[aries]

yes but there are not the crossover schematics

[paa]

And these:
http://www.solen.ca/ssur.htm