Driver Attenuation Circuit (wattage)

[BLoo]

I am going to include a Driver Attenuation Circuit in my system to tune my tweeter down but i only see 10-12 watt non-inductive resistors. Do i need to stack these to support the tweeters wattage?

Ex.
Aurum Cantus G2 tuned down to 90 db (-6db)
40 watt tweeter would require 4x resistors in parallel?

thanks for your info!

[Æ]

I am going to include a Driver Attenuation Circuit in my system to tune my tweeter down but i only see 10-12 watt non-inductive resistors. Do i need to stack these to support the tweeters wattage?

Ex.
Aurum Cantus G2 tuned down to 90 db (-6db)
40 watt tweeter would require 4x resistors in parallel?

thanks for your info!

You should be just fine, it's the woofer, lower frequency music that dissipates the most heat, uses the most power.
Initially, you could hook up your crossover externally so the you could monitor it's performance. Touch all the crossover components while playing some seriously loud music and feel if any of the capacitors, inductors and resistors are getting too warm or hot.

I personally wouldn't worry if the resistors I use are non-inductive or not. The amount of inductance in a crossover type wire wound resistor isn't significant at all, not at audio frequencies.

[billfitzmaurice]

I am going to include a Driver Attenuation Circuit in my system to tune my tweeter down but i only see 10-12 watt non-inductive resistors. Do i need to stack these to support the tweeters wattage?
!

The actual power seen by a tweeter averages no more than 10% of system power. That's why crossover resistors aren't made with high power ratings.

[Dirk]

Æ has a good point about building the XO out of the box. This is a REALLY good idea if you happen to be hand-rolling your crossovers without the help of a measurement rig.

[BLoo]

Æ has a good point about building the XO out of the box. This is a REALLY good idea if you happen to be hand-rolling your crossovers without the help of a measurement rig.

I'm working on an answer to your response to my last question. Currently my plan is:
AC G2 tweeters
AC 165 woofers

XO @2500hz 2nd order Buttersworth:
Jantzen Foil Inductors
Jantzzen Z-Superior Caps

Attenuation for tweeter -6 DB
Mills Resistors

Zobel network: have not figured out how needed this is yet.

[Dirk]

I'm working on an answer to your response to my last question. Currently my plan is:
AC G2 tweeters
AC 165 woofers

Okay, this should work.

XO @2500hz:
Jantzen Foil Inductors
Jantzzen Z-Superior Caps
Mills Resistors

Foil inductors? Seriously? Unless you NEED insanely low DCR (which you don't), you're wasting a shocking amount of money on the foil inductors. Expensive does not mean better performance. Likewise, if you're set on the Z caps, don't bother using them in the lowpass network. They're not in the signal path and it'll be another place you can save your money.

Zobel network: have not figured out how needed this is yet.

Add one on the woofer. This is not negotiable if you're doing textbook crossovers because the textbook values never account for the rising impedance of the woofer.