High Pass filter subwoofer integration


Currently using a subwoofer with my two speakers that go down to 25hz. The variable low pass on my subwoofer is 40 Hz-120 Hz. I am thinking of going with a high pass filter to relieve the speakers of the very low end and to get a better integration. HSU makes a high pass filter but I am concerned that It might degrade the sound. Any thoughts would be helpful. My room is not large, about 12x15 with 8 ft ceilings.
johnc5

Showing 3 responses by martykl

I use an NHT x-2 between an ARC LS 25 and VT 130SE for this purpose and hear no deterioration. That said, you (or other listeners) might hear something that I don't.

Marty
I should probably have added that -prior to the NHT - I used the low cut in my Velodyne SMS sub controller for this purpose. That device operates in the digital domain and subjects the signal to A/D/A conversion which was audible to me. Therefore, I switched to the NHT for low cut in the main signal path while retaining the high cut function of the SMS to roll off the top end response of my subwoofers.

Marty
Dgaylin,

Can you see anything on your measurements that might correlate with the "boominess"? The beauty of the NHT (apart from the fact that I can't tell it's there) is that it will allow you to roll off your mains when the room becomes a problem. IME, boominess usually occurs somewhere between 80hz and 150hz. You can use your SMS to roll in the sub at a frequency above the problem and EQ it away. At the same time, use the x-2 to roll off your mains for most effective integration.

If the "boom" problem proves to be higher in frequency than you like to cross, bassbusters will usually provide another effective solution that allows bringing in the subs at a lower frequency.

Good Luck

Marty

PS More expensive x-overs, like more expensive pre-amps may offer more features, higher cost parts, etc. Will you hear a benefit? That depends on you, your system, your room, etc. etc.