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Cubo15 wrote: @Wannabass: With an 24 dB/octave high pass set at 40 - 45 Hz, you're way more likely to overheat the driver than to see it run out of excursion any day soon. Personally I prefer to give a driver about 1.5 times the AES-power rating. Before most brands jumped to the AES power rating, average power handling values were 1.25 - 1.4 times lower as today. Meaning that the 2 times rms-rating of the past correlates to ~1.5 times AES today.
I'll try to advise in that way that it will keep your Cubo 12 safe and solid. In most situations Cubo 12 (loaded with the 12SB30) will survive on a 25 Hz high pass and still take the power from your current amplifier. Till that one day that you supply plenty of power and the turn tables put in a massive 25 Hz feed back loop. That's why I won't advise it, even though sometimes I'll use a 25 Hz high pass myself
Nice build, really like that double thickness look around the horn mouth.
Best regards
Cubo
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