JBL L80T Scroe with Pics and Questions

[Zilch]

Is there a way I could filter the tweeters to roll off at around 19/20K? Preferably something I could wire inline (without touching the nice JBL crossovers) I swear I perceive higher frequencies, and it's just too much auditory information. I'd guess these are responding up to about 25K... or maybe I've just lost my marbles.

A low value inductor (0.05 mH or less) in series with the tweeter will roll off the UHF. R2/R3 and R4/R5 are the attenuation L-pads for the mid and tweeter, respectively:

http://manuals.harman.com/JBL/HOM/Technical Sheet/L80T ts.pdf

 

[echase55]

A low value inductor (0.05 mH or less) in series with the tweeter will roll off the UHF. R2/R3 and R4/R5 are the attenuation L-pads for the mid and tweeter, respectively:

http://manuals.harman.com/JBL/HOM/Technical Sheet/L80T ts.pdf

You guys rock! :thmbsp:

Two stupid questions:

1: Does it matter which leg of the circuit the inductor is on?

2: Is there a resource to learn about inductor roll-off characteristics? I imagine that they don't just cut off completely at a certain frequency, but instead apply some sort of slope to the curve... I'm thinking inductance determines location of the drop, but what determines the degree of slope?

Sorry to ask so many questions. I feel like Jhonny #5 in Short Circuit...
"Need more data!"

 

[Zilch]

You guys rock! :thmbsp:

Two stupid questions:

1: Does it matter which leg of the circuit the inductor is on?

2: I'm thinking inductance determines location of the drop, but what determines the degree of slope?

1) No.

2) It's a first-order lowpass, and the slope is 6 dB/octave.