PDA

View Full Version : 250 ti crossover ( Lpad ? )



gerard
11-18-2004, 04:46 PM
Hello

Still need some helps ...

I am working on my diy project 250 Ti and I will choose regular 250Ti crossover ( not dc coupled ) .

Can someones tell me why there is no Lpad to set up speaker and thre is those bridging bars ?

Does someone also have any size value for the closed box for 108H and 104H ?

gerard.

Robh3606
11-18-2004, 05:08 PM
They use fixed attenuators instead of an L-Pad, it should be in the brochure. The L250 schematic shows them very clearly.


Rob:)

gerard
11-19-2004, 03:13 AM
Soory


may be I was unclear ;

Why ot using Lpad , it is easier than fixed attenuatoe ? any reason ?

Gerard

Robh3606
11-19-2004, 09:48 AM
Oh

They use the fixed resistors because the pot's can get noisy over time. They oxidize with time so you have to put the wipper through it's full range a couple of times to remove it. They can actually drop a drivers level over time.

Rob:)

gerard
11-19-2004, 10:19 AM
Thank you rob3606 !


I will do that !
No idea for the 104H and 108H enclosure ?
regards
Gerard

4313B
11-19-2004, 10:50 AM
104H = 80 cubic inches

108H = 0.25 cubic feet

LE14H-1 = 4.2 cubic feet

gerard
11-20-2004, 03:49 PM
Ok Giskard tahnk you

Now an other question because I need to buy the xover components :

I will use a 035Ti instead of 044ti in the 250Ti crossover I want to build .
At the end it looks like the 250 ti bq component !,
Should I change the Hf and uhf values of the crossover or not ( 250ti cross 5.2khz , 250ti bq 5.5 khz ) not so big difference ?
If yes Any idea of those new values ?

Forgive my lack of knowledge please !
thank's
gerard .

Guido
11-26-2004, 10:28 AM
Gerard, this might be interesting for you!

It is an auction for 2 original and never used 250ti crossovers incl. schematic.

http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&category=21997&item=3856129992&rd=1

gerard
11-29-2004, 01:09 AM
guido


Thank you so much , Guido . It seems very interesting to me .

I am also looking for 104 H and can't find any on ebay , I found some 104H2 but I am afraid to not have the best result .... I have seen it overpowered the other spakers on a thread, otherwyse I will go to 104h2 and try to add an attenuation ! .Le 5 !!! , I believe 104 H would be better for a vintage speaker ...
I have seen 093 might be ok but also noone in ebay .

Any advise ...

Best regards

Gerard

Guido
11-29-2004, 03:29 AM
Gerard,


I can't help with the 104H but other members sure can.

I can offer my help if the german seller of the xovers make problems with shipping to morroco.

gerard
11-29-2004, 05:50 AM
Guido

Thank you for your help .
In fact I am dealing withan Us companie who got headquarter in Germany so I can manage to send the goods in germany and forward it to morocco if necessary also I will be in dusseldorf next week !.

jst ask in an other thread about bi wring , Should I connect 2 cable + to 1 output from amp and 1 on each plug of filter and sthe same for - ?

Best regards

Gerard