Speakers to alleviate room anomolies


I have a suckout of 8db from 58 -70 hertz which is taking the life out of the music. I currently have Von Schweikert VR7SE an added a velodyne dd18 which took away the problem. It gave the bass energy in my room of 30 x20x10. It seems I do not need the big cabinet speakers[VR7SE] if the woofers aren't throughing enough. Speakers with active woofers like the evolution acoustics mm2 have been recommended. Any other ideas of speakers in conjunction with the velodyne dd18 to make my room sing again.
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Bob_Reynolds: I like poking fun at Duke as well. He and I go back a long time.
Just 8db suckout at a certain frequency is not enough info to sort the problem out. The 8db drop could be from bass cancellations, bass leak or an object absorbing too much. THere are other parameters Rt 60, impulse response when you are looking to solve this problem. I am no expert and currently working on room issues too. Sub is ok but probably not the best solution. Best i to get professional consultation.