I would not expect that subwoofer to be among those that might match well with ESLs - 'fast' is not really one of their strengths.
The Rel Strata used to be recommended for the 57 regularly.
The best solution would probably be some kind of OB sub but you are likely looking at either lots of woofer area or EQ.
The Rel Strata used to be recommended for the 57 regularly.
The best solution would probably be some kind of OB sub but you are likely looking at either lots of woofer area or EQ.