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Old 1st February 2006, 09:31 PM   #1
benny27 is offline benny27  United States
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Default need help with crossover for PMT1

I am some what new to diy speakers and crossover design is over my head.

so I would like to buy a premade crossover.
but do not know what to get.
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Old 1st February 2006, 09:35 PM   #2
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One of the problems with premade XO's is that they don't take into account the actual impedance of the drivers at the XO. They are rated for 8 or 4 ohm but it's not often what the drivers are at the XO. So it changes where the XO point is and can sometimes overlap or create a drop out in the response graph.

What slope of XO are you looking for?
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Old 2nd February 2006, 07:23 AM   #3
benny27 is offline benny27  United States
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Quote:
Originally posted by Cal Weldon
What slope of XO are you looking for?
no idea about the XO slope.
I am not going to have a sub
I am going to use

Vifa P21WO-20-08 woofer http://www.partsexpress.com/pe/pshow...number=297-310
Vifa D26TG-35-06 soft dome tweeter http://www.madisound.com/cgi-bin/ind....6719&pid=1328
in the box shown at http://www.linkwitzlab.com/proto.htm#PMT1

I could put a crossover together if I had a prts list and a good diagram.
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Old 2nd February 2006, 08:48 AM   #4
sreten is online now sreten  United Kingdom
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Click the image to open in full size.

/sreten.

note that the 0.2 R is the DCR of the 3.3 inductor
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Old 2nd February 2006, 08:53 AM   #5
sreten is online now sreten  United Kingdom
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Quote:
Originally posted by benny27

I am not going to have a sub
Huh ?

No sub with an actively equalised small open baffle ?

I don't think so, are you sure what you are planning will work ?

/sreten.
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Old 2nd February 2006, 01:32 PM   #6
benny27 is offline benny27  United States
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Quote:
Originally posted by sreten
Click the image to open in full size.

/sreten.

note that the 0.2 R is the DCR of the 3.3 inductor
that is good but I have no idea what parts to get for all the 4.7, 0.2, 3.3.....

Quote:
Originally posted by sreten


Huh ?

No sub with an actively equalised small open baffle ?

I don't think so, are you sure what you are planning will work ?

/sreten.

I do not have the $$ now for one.
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