Um, sorry @Contuzzi - EQ is OK, but not as good as bass traps AND EQ.
At the very least, EQ can cut out the severe peaks (20 dB is not exaggerating), allowing you to raise the overall level of the subwoofer to better match the main speakers. It's not ideal, since the overall problem of energy lingering too long remains, and it's impossible to fix nulls this way alone.
Still, EQ alone offers major benefits, without necessarily achieving reference quality.
Best,
E
At the very least, EQ can cut out the severe peaks (20 dB is not exaggerating), allowing you to raise the overall level of the subwoofer to better match the main speakers. It's not ideal, since the overall problem of energy lingering too long remains, and it's impossible to fix nulls this way alone.
Still, EQ alone offers major benefits, without necessarily achieving reference quality.
Best,
E