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If I wanted to increase the volume of the tweeter very slightly, which resistor would I decrease the value on, and by how much?
I was thinking R3 to 5 ohm, or R2 to 50 ohm? thanks
Follow Ups:
Try a 4 ohm resistor at R3.
Thanks for the suggestion guys, I'm really only looking for roughly a .5dB
increase. Tried silver caps and wire to accentuate the sparkle with no luck.
As a 1st approximation, since R2 is in parallel with C1/C2 changing it's value at high frequencies would have minimal effect. [Logic: As you probably know, for parallel impedances Z = (Z1*Z2)/(Z1+Z2) and if Z2 < < Z1 then Z=Z2. Assume Z1 is the resistor and Z2 is the impedance of the C1/C2 then in fact at high frequencies Z2 < < Z1].
Changing R3 would also have minimal effect for the same reason -- it is in parallel with C1/C2. I would estimate that either change you propose would increase the tweeter output by about 0.1-0.3 db depending on the frequency. This may be what you are looking for. Raising the value of C1/C2 would actually be a more effective way to boost the tweeter output but of course this will effect the crossover frequency. I would recommend an analysis of the effect on the crossover frequency before deciding which way to go. A spice model might help.
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