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  1. Hi all, I'm in need of help in regards to swapping the tweeters in my Aaron ATS-5 main speakers. This all started when Ditu's Aaron HMF-600's became available for sale and I was the intended buyer until I wrote my car off the following day and funds aren't there atm! Anyway I had been trying to decide for some time about swapping the tweeters out for the Vifa XT25 which Aaron actually use in there top end (Hyperboloid) model. The only thing I would like more with my ATS-5's is the tweeter although it is nice and mellow for my liking (newly owned them since 98!) they seem roll off at the top end just a little to much and I would like to try the XT25. The Dali's I bought are just to bright for me and although they have great detail they are very fatiguing but also are only bookshelf speakers so maybe its a combination of that? My friends Jamo are similar to me in that they are to bright and although this can seem good for HT with movies it is a killer on my ears very quickly. I thought that if the Vifa's fit the cutout no probs or with little mod I'd be willing to buy a pair and make the crossover separate to match. Aaron use all electro caps so no big dollar stuff needs to be applied but I will need help for what crossover components to use? I have photos of my model of ATS-5 but believe the standard tweeters were crossed at 5khz (as are the HMF's). I can supply pdf's of their crossover layouts as they provide them on there website. Vifa sell a couple of different models in the XT25 though and I'm not sure which ones to use? They have the XT25TG30-04 and the XT25BG60-04 but was thinking of using the TG30? My speakers have the specs are- Freq Resp- (28Hz - 23kHz (+/-3db) Power-(30 - 200 watts) Sens-(93db) Imp-(6 ohms) and the design is of (Low Q Ratio)! Not sure the 93db sensitivity is correct but they are efficient and at least over 90db using fabric cone surrounds! Can a 4ohm tweeter be used with the 6ohm system no problems though as this is out of my knowledge base? I thought of just copying Aaron's crossover design from there HMF-600 Mk1/Mk2 which is also at 5khz with also what I think is a filter for the resonant freq? Anyway all or any feedback is much appreciated and can add links, schematics or pics if needed. Thanks, Brett
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