Subwoofer high-pass filter frequency

[Facet]

I need advise.

I am considering a subwoofer with 25-120 KHz +/- 3dB and a 70 Hz high-pass filter frequency. My front channel speakers frequency response is 75 to 20 KHz. Does it mean that my sub will cut off at 70 Hz before the floorstands will kick in at 75 Hz?

Thanks in advance.

 

[Sheep]

I need advise.

I am considering a subwoofer with 25-120 Hz +/- 3dB and a 70 Hz high-pass filter frequency. My front channel speakers frequency response is 75 to 20 KHz. Does it mean that my sub will cut off at 70 Hz before the floorstands will kick in at 75 Hz?

Thanks in advance.

Which subwoofer is this? If it has a response to 120Hz you just have to adjust the crossover knob to 80Hz(its good to overlap a little). Or, if you have bass management in your receiver/prepro, you can select an 80Hz cutoff frequency in there, and turn your subwoofers crossover knob all the way up.

SheepStar

 

[j_garcia]

A crossover is not a brick wall. The sound will begin to lessen starting at 70Hz and as it goes lower, the sound level will drop off, but they will still be playing sounds down to at least 40Hz, depending on the slope of the crossover. Adjusting the sub's x-over will not affect the crossover point of the main speakers, only the frequency sent to the sub, so that means you will need to manually blend them together to get the response you are after. "Overlap" is a function of the crossover, and manually adding overlap may NOT be a good thing. The best way to adjust this will be with an SPL meter and test tones, or as Sheep mentioned, let the receiver handle the crossover.

 

[bobbydigital]

the high pass filter is is applied to the high pass outputs which are there if you are using a second amp to run your mains. You input the left/right channels to the sub via low level rca jacks, the sub then filters the low frequencies out ( in your case 75 hz and lower i think) and then you output the higher frequencies from the HIGH PASS output red/white rca jacks on the sub to your other amp.
If your not using another amp you dont need to be concerned about the high pass filter.