External Crossover


On the advice of SVS I changed my setting on my subwoofers from 50 hertz to 63 hertz. In addition, I turned the volume up. The change opened up the soundstage, more detail, better /more defined bass. Not a night and day difference, but easily heard. Now I'm looking into purchasing a JL Audio CD-1.
Two questions:
1. Are there other external crossover units that I should consider?
2. Should I expect similar results as when I changed the low pass filter from 50 hertz to 63 hertz with the external crossover?
ricred1
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I use a Behringer DCX 2496 modded by Audiosmiles, over in the UK. Best $1k crossover you can get.
Bob and Cerrot,

Thanks for the response. I've already called HSU and left them a message. I will follow-up tomorrow.
IMO, the first question you need to figure out is whether you want to go analog or digital. Digital XOs offer many advantages, but some folks don't want to there. DSP of low frequencies (including digital room correction) offers IMO the opportunity for a huge improvement in sound, particularly for those using subwoofers who can also benefit from improved integration of sub and main speaker.
I talked to HSU today and they told me, "an electronic crossover would be of no benefit to my system due to the fact that I'm using a Integrated amp."