This is something I have been curious about for awhile but I have been unsuccesful in finding the answer using google.
So a typical stereo amplifier like for example the Denon 720AE will reproduce frequncies down to 20hz. Then you have a speaker like the Q Acoustics 3020 that only go down to 64hz. I assumed the cross over would filter out anything below 64hz but this doesnt appear to be the case because if you set up a turntable without a subsonic filter you will see woofer excursion on the speakers which leads me to believe the frequencies lower then 64hz are not being filtered out by cross over as the speaker is attempting to reproduce them. Albeit unsuccessfully.
Can anyone explain why this is the case and if a cross over dosen't filter out low frequencies it cannot reproduce then wouldn't it be unsafe for the speaker even when you play a typical CD which still supports frequencies down to 20hz like amplifiers?
Also with home cinema amplifiers you can set a frequecy cut off which you cannot do on a stereo amp. So how do stereo amps become compatible with a wide range of speakers if you cannot set a cut off point?
So a typical stereo amplifier like for example the Denon 720AE will reproduce frequncies down to 20hz. Then you have a speaker like the Q Acoustics 3020 that only go down to 64hz. I assumed the cross over would filter out anything below 64hz but this doesnt appear to be the case because if you set up a turntable without a subsonic filter you will see woofer excursion on the speakers which leads me to believe the frequencies lower then 64hz are not being filtered out by cross over as the speaker is attempting to reproduce them. Albeit unsuccessfully.
Can anyone explain why this is the case and if a cross over dosen't filter out low frequencies it cannot reproduce then wouldn't it be unsafe for the speaker even when you play a typical CD which still supports frequencies down to 20hz like amplifiers?
Also with home cinema amplifiers you can set a frequecy cut off which you cannot do on a stereo amp. So how do stereo amps become compatible with a wide range of speakers if you cannot set a cut off point?