3db passive cut for tweeters

Hey everyone, I'm new here and began constructing my first custom mobile audio system near the beginning of summer. I am now almost complete but I do have one little nit-picky modification I would like to make to my most recent item installed (a JBL P660c component speaker set). The crossover units included with each woofer/tweeter pair has a nice feature for a 6db high-cut to the tweeter. When I installed the set and powered on for the first time I found the tweeter presence to be a bit in excess. So I hit the high cut...well that leaves things sounding a bit muffled, and also affects the imaging a bit negatively (IMO).

So I decided I want to implement a 3db cut and get the best of both worlds. My initial thought was add another 2-ohm resistor in series between the crossover and tweeter in order to cut the power in half...then I read even a passive resistor will dissipate power with it, resulting in a four-fold decrease in power, leaving back at square one with -6db.

So I'm wondering if anyone here could point me in the right direction toward rigging up something through other means. Perhaps a voltage regulator of some sort?

Try this for calculating your L-pad values:  https://www.apicsllc.com/apics/Misc/filter2.html#lpad

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Thanks! I had never heard of these types of circuits before, but that seems like it will fit the bill perfectly. I did return with some obscure values though. 0.58ohms for R1 and 4.84 for R2. Might be a bit tricky to find something like that (maybe I'm wrong). I suppose I could try and use a 0.5ohm and a 5ohm resistor. Might result in something closer to a 2.5 db cut from what I gather playing around with the calculator, but that's completely fine!