I currently have 2x DIY subs, one with an Rlp15 (tuned to 15.5hz) and one Rlp18 (tuned to 22hz). I finally decided to measure their freq. response, and ended up with this:
Both subwoofers together:
Rlp18 with phase180
Rlp15 and Rlp18 (With Phase 180)
I got a nasty peak at 26.6hz. I think this can be fixed, just by lowering the SPL on both subwoofers at 26.6hz, on my DCX2496.
It also seems that the Rlp18 has the best freq. response when it's phase is set to 180. But it still drops like a rock below 26.6hz.
Rlp15 + Rlp18 (Phase180) seems to at least have potential for SOME lowend. But from 26.6hz - 40hz there seems to be a null.
I don't know what else to do than to move the subs, until I get a decent flat response from 26.6hz and up to 80hz.
But what im having problems finding out, is where all the SPL goes from 26.6hz and below! I should have good output at least down to 15hz (even though the Rlp18" is just tuned to 22hz.. even that subwoofer should have good output to 20hz). I suspect that there may be something I have configured wrong on the DCX2496 - since it drops like a rock under 26.6hz. On the DCX2496 the Rlp18 is configred to: "BUT48" and "20hz". All my subwoofers are connected to "INPUT C" on my DCX.
Any ideas what might be wrong ? :dontknow: