DIY Speakers - JM Labs - Help!

[mark.carline]

Well i am about 90% certain i want to build another pair of DIY speakers and before I do I wanted to run them past a few people on here that maybe able to help with what I am thinking of doing.

I am thinking of building a three way system that is similar to the following JM Labs high end units:

Alto Utopia Be
http://www.focal.tm.fr/gb/home/utopiabe/altobe.htm

or:

Diva Utopia Be
http://www.focal.tm.fr/gb/home/utopiabe/diva.htm


So far I have decided (around 90% certani) on the tweeter and midrange units and so the drive units I have in mind are as follows:

TWEETER:
JM Labs - TC120 TD5
http://www.focal.tm.fr/gb/compo/tweeter/tc120td5.htm

MIDRANGE:
JM Labs - Audiom 6 WM / 6W4411
http://www.focal.tm.fr/gb/compo/midrange/a_6wm.htm

WOOFER:
Not really decided on this yet but a choice of either two of these:

a) JM Labs - 11K7512
http://www.focal.tm.fr/gb/compo/woofer/11k7512.htm

or:

b) JM Labs - 10W6411
http://www.focal.tm.fr/gb/compo/woofer/10w6411.htm

I have the following questions for anyone on here that can help.....

1) Does anyone have the exact cross over circuit diagrams used in the "Alto Utopia Be" or the "Alto Utopia Be" JM Labs speakers??

2) Does anyone here own or heard the above two woofer units that can comment ?

3) Can anyone recommend or send me any free speaker design software (email address below) that will allow me to model the cross cover with the specs from the above driver units??

4) Box design. Currently I am thinking about having one totally sealed box split in two (one for the woofer and the other for the midrange / tweeter). Is this best ??

Thanks to anyone that can help!!

Mark.Carline@btinternet.com

[sreten]

http://www.falcon-acoustics.co.uk/specsum.htm

the C800/II seems nearest to your plans.

Can't find documentation of these designs.

A good way of splitting one box is using an inverted
midrange and tweeter and putting an angle into the
top of the box.

sreten.

[Taco]

HobbyHIFI (german diy magazine) has made a 3-way using the 6w audiom and 10w and a raven r2/ tc90-td5

Tigra

very good speaker design software (Microsoft Excel sheet).

Unibox

[mark.carline]

thanks for that information...

If anyone else has built or knows the cross over units used in these speakers above I would love an email or just post on here.

thanks

mark.carline@btinternet.com