Originally Posted by
Macca
The speakers already have a tweeter so I don't know what gains you are hoping to make by adding another. From the response you show it doesn't extend much higher than 20Khz anyway. Usually you would look to roll in a supertweeter where the existing tweeter gives out. Do you know the upper FR of the existing tweeter? I guess if it is quite low(15Khz) say then it might be worth trying the supertweeter. Otherwise you are just doubling up on what is there already, you'll get cancellation, reinforcement, comb filter effects. All a bit random it seems to me.