Best cut off frequency for subwoofer

[boyzone]

All sifus,

I just completely installation on my power amp with DIY mode.
Get a 2nd hand MA 502 power amp and bridge the output to push on my 8 inch subwoofer in tube.
Now my question is:

What is the best cut off frequency ( LPF x-over ) for my subwoofer?
Pls advise.. Thanks.

 

[Zenn]

also depends on your mids high pass frequency. usually as starting point, sub's low pass frequency and mids high pass frequency is the same. u can try something like 60hz. but since your sub is only 8inch, maybe need to go higher la, 75 or 80hz. from there u can play a bit, whether overlap or have a gap between the two frequencies.

 

[appleyard]

uhhmm... actually an 8 is not considered a subwoofer. But my guess is between 80-100hz

 

[boyzone]

going for 8 inch is because of space limitation at my trunk.
Anyway, what is 8 inch woofer Hz range? Is it able to go as low as 30Hz?
Pls advise.. Thanks.

 

[Zenn]

in theory it can reach 30hz but u wont be able to hear or feel it much...only large subs in large boxes can play low frequencies efficiently without damaging the sub.