What is the best way to tame a slightly bright speaker?


I know the answer is get a speaker that isn't bright,  but I've got a pair of TAD Evolution Ones that I like quite a bit except that the magnesium midrange and beryllium tweeter are just a little bright for me.  I'm driving them with a D'Agostino Classic Stereo, which I needed to drive my old speakers but I don't need all that muscle for the TADs (89db sensitivity, 4 ohm impedance {doesn't drop below 4 ohms}) recommended power 50 to 250 watts. 

I'd like to get  an amp that does voices especially well.  I know somebody posted recently that a subwoofer solved his brightness problem and I may look into that at some point.  Any and all suggestions are welcome.
128x128tomcy6
Buy a nobsound volume control . I guarantee your speakers will not be bright once installed . 
@tomcy6 I use a BAT 51se for my preamp. I think the sound is just slightly dark, and would offset a pair of slightly bright speakers. I found mine used for about $3K.
I have very revealing speakers that tend to sound bright with substandard recordings. I bought a schiit loki  and it works very very well.  For $149 it’s definitely worth a try.Also you could maybe try swapping out the diaphragm for a non-metallic diaphragm.Also some people mentioned padding  down the crossovers and others cautioned against it. I would definitely try it just record the values of the stock configuration that way you can always put it back.