Tweeter Level Resistor Placement In XO

[TubaV]

I built these using SB13PFCR25-8 and Peerless DX 20BF00-4. A former member of the forum helped me with the XO even though no measuring/modeling capabilities here. These seem to be pretty well behaved drivers. I know many will beat up on my XO due to lack of measuring/modeling but I am well pleased with the sound. I would like to mount the XO inside the box but the board is too large partly because I used a variable L-pad. Would the best way to adjust tweeter level be to add the resistor before the XO in the tweeter circuit? Credit to Michael Chua for the cabinet design used in his Sparrow. It seems to fit the SB13 well even though he used the 4 ohm version. Thanks for any and all suggestions.
https://meniscusaudio.com/wp-content/uploads/2020/03/SB-Acoustics-SB13PFCR25-8-Data-Sheet.pdf
Peerless DX20BF00-04 Tweeter

 

[Galu]

The attenuating resistor should be placed in front of the components in the tweeter filter.

 

[PeteMcK]

re: add the resistor before the XO - no, between the XOver and the tweeter

 

[Galu]

Won't that change the crossover frequency?

 

[PeteMcK]

Not if he's using an L-pad... if a single resistor then, yes, before the XOver

 

[Galu]

That's the idea, he is replacing the L pad.

 

[PeteMcK]

The symmetrical values of the crossover components makes me suspect that 'Nominal' impedance has been used in the calculations, rather than actual....

 

[TubaV]

Thanks for your feedback. Any suggestions on improving and/or starting over on the XO?
Thanks again.

 

[Galu]

If you are "well pleased with the sound" you could just sit back and enjoy your speakers. 😉

As you are aware, you would need measuring/modelling capabilities to, perhaps, do better.