I don't usually build passive speakers but this time circumstances demand a passive crossover and an adjustable L-pad so bear with me if it is a bit on the silly side!
The problem is all the L-pads I can find are 8 Ohm but the tweeters I'd like to use are either 4 or 6 Ohm.
With that in mind do I use 8 Ohm or the tweeters actual impedance when calculating the high pass portion of the crossover?
Or should I use a series resistor to bump the tweeter impedance up to 8 Ohm after the L-pad?
The problem is all the L-pads I can find are 8 Ohm but the tweeters I'd like to use are either 4 or 6 Ohm.
With that in mind do I use 8 Ohm or the tweeters actual impedance when calculating the high pass portion of the crossover?
Or should I use a series resistor to bump the tweeter impedance up to 8 Ohm after the L-pad?
I think I'll end up doing that but just out of curiosity what would happen if I were not to use a series resistor?
I would quite like the opportunity to use the voltage that would be lost across that resistor for the tweeter if at all possible.
I would quite like the opportunity to use the voltage that would be lost across that resistor for the tweeter if at all possible.
The L-pad set for no attenuation and full attenuation results in load presented to the high-pass section equal to (respectively) the impedance of the tweeter and 8 Ohm. If the tweeter impedance is 6 Ohm, then you could design the filter with Z = 7 Ohm with probably very little error.
Maybe you would run into problems if the order of the high-pass section is greater than 2nd.
Maybe you would run into problems if the order of the high-pass section is greater than 2nd.
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