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Autoformer in crossover design help needed

P

pesoo

New Member
Hi guys im a bit stuck in designing a crossover
I have a 3 ohm 6w field coil fullrange driver which i would like to match with a Philips 25w 8 ohm woofer
Im using a 25w mono tube amplifier to power them
So i would not damage to fullrange im also using an autoformer in the crossover the af is 2;1 i believe as it reduces 220 to 110 voltage.
I would like the crossover frequency to be somewhere between 350 to 450hz..but using any method i can think of i can not figure how to calculate the design and the filter values
Ps the autoformer shows 10 ohm resistance with a multimeter, the fullrange shows 2.8 ohms and the woofer 6.5ohms with multimeter.
Absolutely any help or advice would be much appreciated
 
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pesoo said:
Hi guys im a bit stuck in designing a crossover
I have a 3 ohm 6w field coil fullrange driver which i would like to match with a Philips 25w 8 ohm woofer
Im using a 25w mono tube amplifier to power them
So i would not damage to fullrange im also using an autoformer in the crossover the af is 2;1 i believe as it reduces 220 to 110 voltage.
I would like the crossover frequency to be somewhere between 350 to 450hz..but using any method i can think of i can not figure how to calculate the design and the filter values
Ps the autoformer shows 10 ohm resistance with a multimeter, the fullrange shows 2.8 ohms and the woofer 6.5ohms with multimeter.
Absolutely any help or advice would be much appreciated
Click to expand...
search engine crossover builder there are great programs to do all the math for you.
 
Hi guys i need help in a crossover design
I have a field coil 3 ohm 6w full range which i would like to match to a 25w 8ohm woofer
Using a tube amp 25w
I ll need to add an autoformer to protect the fullrange alone but the impedence imbalances have confused me
The autoformer is 2:1 as it aas used to reduce voltage from 220v to 110, it shows 10 ohms on the multimeter..the fullrange shows 2.8 and woofer 6.5 ohms
Any help would be much appreciated
 
I just need to know if i add the impedence of the autoformer to the full range to put in for calculations or not? So 8 ohms and 13 ohms
 
AK asks that you post just one thread on a topic - dupe thread posts merged into 1st thread.
 
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