I am trying to find a suitable box size and LT-transform for a sealed XXLS 10" based woofer to be used fairly high up in frequency, to about 120-160 Hz, for music use mostly. I use winisdpro for modelling and I'm now trying to figure out how to design this so that I don't risk exceeding the driver's xmax. Can someone help me by explaining how I should think regarding excursion and amplifier power, what is the best solution here...? I have searched this forum and read Linkwitz, but I'm afraid I don't get it all yet ...

If I have a closed box of 40 liters I can enter a signal of 105 watts and the excursion stays below xmax all the way. If I also add an LT-transform (Fp=25Hz, Qp=0.55) then the excursion exceeds xmax already at about 38 Hz. Reducing the signal to about 25 watts makes the excursion stay below xmax until 20 Hz.

The reason is use the figure 105 watts is that I was hoping to use a certain amplifier giving 105 watts into 8 ohms, but I am in no way limited to that specific amp.

BTW: If I model a small box of 14 liters then I won't exceed xmax even when having a signal of 105 watts + LT, but that causes a small and somewhat ugly hump in the respons at about 100 Hz ... is this the way to go?

Regards,

M.A.