How much power can a BTL 18 take???

[eskii 0]

How much power should i put on a BTL 18 if i plan on running it for fairly decent lengths of time, 15-30min, at high volume. Is 4.5kw too much for that kinda usage... It'll be in a rather tight ported box

[KU40 173]

You'll definitely fry it with that. Try 2000 above tuning, way less below.