By design this is a series crossover with identical values for both the woofer and tweeter - can I use a thicker gauge inductor on the woofer for a lower DCR than the tweeter inductor in this case? Here is a quote from Jeff's write up -
"I wanted to see if it were possible to create a successful design using what I call a “balanced Series Crossover”. In my “balanced Series Crossover” the second order filter values for both the highpass and lowpass sections are identical mirror images of each other"
The schematic calls for .80mH air cores - and I'm looking at what PE has. Can I use the Dayton 14AWG(257-316) w/a DCR of .22 on the woofer and either the the Jantzen 18AWG(255-242) w/a DCR of .43 or Dayton (257-822) w/a DCR of .44 on the tweeter? Or would that throw of the "balanced series crossover"?
"I wanted to see if it were possible to create a successful design using what I call a “balanced Series Crossover”. In my “balanced Series Crossover” the second order filter values for both the highpass and lowpass sections are identical mirror images of each other"
The schematic calls for .80mH air cores - and I'm looking at what PE has. Can I use the Dayton 14AWG(257-316) w/a DCR of .22 on the woofer and either the the Jantzen 18AWG(255-242) w/a DCR of .43 or Dayton (257-822) w/a DCR of .44 on the tweeter? Or would that throw of the "balanced series crossover"?
Hey,
The best way to answer this is to use XSim (easiest) or VituixCAD and simulate it yourself.
Good crossover designers incorporate the DCR into their simulations though, so proceed carefully with anything from Bagby. In particular take a look at the transfer function and make sure you don't screw up the overall speaker impedance. If you reduce DCR, which then causes you to get more output, of course it will sound different! 😉
One special case is using DCR in the baffle step compensation calculations. If you must have resistance, the coil is the place to have it.
The best way to answer this is to use XSim (easiest) or VituixCAD and simulate it yourself.
Good crossover designers incorporate the DCR into their simulations though, so proceed carefully with anything from Bagby. In particular take a look at the transfer function and make sure you don't screw up the overall speaker impedance. If you reduce DCR, which then causes you to get more output, of course it will sound different! 😉
One special case is using DCR in the baffle step compensation calculations. If you must have resistance, the coil is the place to have it.
You want the lowest DCR possible in a series xover. The L1 in the main 3 component leg that is across from the tweeter needs to be as low as possible. This will hand off to the woofer, and attenuate it if it has a higher DCR, as well as shunting the lows away from the tweeter.
Whatever you use, use 2 of the same, and as large of a gauge as possible, or it will pad down the woofer output. I would advise against 20 or 18awg coils. 16awg or larger should be fine. They don't make Laminate coils in smaller than 1.0mH due to how they function, so stick with air cores.
Whatever you use, use 2 of the same, and as large of a gauge as possible, or it will pad down the woofer output. I would advise against 20 or 18awg coils. 16awg or larger should be fine. They don't make Laminate coils in smaller than 1.0mH due to how they function, so stick with air cores.
Thanks, Wolf. That was the answer I was hoping for, while also not the answer I was hoping for. Brings cost up a good bit, but it is what it it is, I guess.
A low DCR inductor for L1 helps to protect the tweeter in a series crossover. Jantzen do make some iron core inductors with very low DCR but I've always used large wire air core for this application. IIRC when I tried the Tributes I used 15AWG.
