Hello, It looks like your subs have a 100 hertz high pass filter. Just run your line to the input on the DD15’s and then out to your amp. You might have to look at a manual but there is a 90 or 100 crossover switch on the back. You can at least use this to see if you like the sound or if it degrades the sound in any way.
Do No Harm ... well the least harm anyway
I want to insert a high pass filter between my preamp and amp (both Benchmark) so I can limit the frequencies going to my full range speakers (Ref 3A Nefes II) to over 100Hz with a 24 db/oct. slope. The 3 possible ways are passive, active, or digitally (A to D then D to A where this is done through software). I am seeking opinions on which method would be the least intrusive to the original signal (ie. best sounding). Thanks for any replies.