| You have no idea how loaded this question. The crossover point with the MiniMe is not a tactical question but actually the very strategic question of the entire speaker, let me to explain why. The woofers that I use are fairly bizarre – they are what made me to think about the MiniMe. They have diaphragms made with reinforced fabric, the outer suspension is rubber. However, the reinforced fabric is semi-soft in the similar elasticity as the outer suspension. So, it is not a piston motion (like in foolish ceramic drivers) but rather motions with a lot of break ups – the right motion in my books. But then is the kink of the driver- the dust cap. The dust cap is inverted dome of aluminum and it the way how it placed makes the dust cap as the literally keystone of the diaphragm resonance. It is sort of the resonance’s lighting rod – if you see the driver then you understand why I got enthusiastic about it. Now, the woofer goes up, let say to 4K-5K and the dust cap begin to ring. The similar effect to JBL LE8 that also has metal dust cap. Here is where I will be playing with my woofer – to tune by ears the dust cap’s resonances. You see, that dust cap ring in a very measured dosage is in fact very good (in context of these speakers) as it works like the “Oops-resonator”. I will damp the dust cap by painting the driver with volcanic ash (no speaker white cones in my home!!!). That will extend the safe operation of the driver for 500-1000Hz up but the primary tuning tool for me will be the crossover point. So, I will be searching for crossover point by just listening the Oopses with witch the woofer’s dust cap will resonate – where it will become too much Oops then I will cross right there… Well, here is the question: how the woofer’s dust cap will behave if I have 6-8 woofers per channel and the excursion of each woofer is substantially minimized? I have no answer now but I think I will found another 2K of response. Then we have the HF’s cancelation coming from the line-array configuration… It will eat the HF but will it each the dust cap Oops-resonances with the same appetite? I have no answer now… How the “not eaten” residues of the HF woofer resonances will be “subjectively friendly” to the distortions of the 70-20XR tweeter’s lower knee? I have no answer at this point. I need to found the woofers, to build the box to screw the array of the woofers and the tweeter in and start to run the crossover point up and down, to hear how it will work all together. I have no planning to cross at a specific point I will cross it wherever it will be, I anticipate that it will be somewhere between 2K and 6K, most likely a second order. |
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