Fri Jun 24, 2011 7:31 am
Hello Giuseppe,
If I understand correctly, it sounds like you're sending some notes ONLY to the sub. If so, it will not play the overtones of those notes above the sub's cutoff frequency, so the notes will sound more like "thuds". Any note sent to a sub should also go to "normal" speaker(s), which will then play the higher frequencies, the overtones, of that note.
There are many ways to do this, which you will find in other posts. I connect my DefTech Reference as follows: L and R outs from my audio interface/sound card to the sub low level L and R inputs, then the sub L and R low level outs to my amplifier inputs, then the corresponding amp outputs to a pair of speakers. If your speakers are powered, you would go directly to them from the sub low outs, skipping a separate amp. The sub plays frequencies below the cutoff you set (I think mine is set at 80?) and the other speakers play the frequencies above the cutoff, for all notes. I also balanced the output levels of the speakers, and did some voicing to reduce standing wave resonances in my playing space.
I have other speaker pairs, so I route all 16/32 foot ranks to my sub/speaker group, and other ranks among other groups. Others prefer to split ranks, with the low notes going to sub/speakers. Or making an aux mix-down group for the sub. Hauptwerk allows lots of alternatives.
I was completely disappointed when I first connect my sub, because I had sent low notes only to the sub, and higher notes to other speakers. Low notes were dull-sounding at best, and more like thuds. Other forum members kindly pointed me to my current routing approach, and the sounds are wonderful for all notes, wonderfully deep and full.
Hope this helps.
Barry