L Pads

I used to think that I was throwing away voltage sensitivity, but an L Pad can greatly benefit the tweeter or mid impedance . The MTM . +6 Db is a good place to start.

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This is called a conversation starter.

Ready, Go

Interestingly I just recently measured a flattening impedance on the tweeter of a beyma coaxial I’m playing with through use of an LPad circuit. I hadn’t posted as I wanted to confirm I had measured correctly (DATS) and have been waiting for some backordered resistors to give it another look.

And by adjusting the Rs and Rp values you can (slightly) move the Zin, from which to set capacitor value.

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Conversation? Gross. I’m just here to give thumbs up and hearts. :laughing: (satire)

Kinda the backbone of passive filter operation: Reduce sensitivity until the resulting overall response is satisfactory.

IMO, this is the L-Pad’s best party trick. It won’t make a tweeter’s Fs peak go away, but it’ll usually lower it “enough”

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Pounding the squigglies flat with notch filters and HP/LP filters also throws away voltage sensitivity. Depending on how things go, you may not even need to use a padding resistor or L-pad, either before or after the HP/LP filters. Bottom line is that the woofer sensitivity after BSC determines your overall base level of sensitivity,. So, instead of suggesting that an L-PAD is perhaps throwing away sensitivity, you could turn this around and blame the woofer for throwing away sensitivity by not being sensitive enough. Does that make sense?

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It does. I am enjoying learning about passive filters and I am amazed at how good these TV speakers are sounding all because of the crossover and my persistence and your help and some dumb luck.

I’m always surprised at how much the “dumb luck” factor comes into play when I get a speaker to sound good. (Although “work helps luck”! )

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