I've owned JLA, Rel, M&K Martin Logan and others. I've heard SVS, Rhythmik, others. The best combination IME which I currently own are JLA Fathoms with an outboard Jensen high to low output converter.
Also, any sub can be difficult to integrate if you don't know how, and without measuring to aid with dialing in, it's nearly impossible to get seamless integration. Then of course, final tuning with your ears.
Also, any sub can be difficult to integrate if you don't know how, and without measuring to aid with dialing in, it's nearly impossible to get seamless integration. Then of course, final tuning with your ears.