Quote:
brucek wrote:
 Agreed, and the BFD is a very inexpensive device that doesn't enjoy circuits with creative pathways for noise immunity, but it does a very passable job in this low frequency application. The noise floor also isn't anything to write home about, but subwoofers aren't victims of the bandwidths involved.
Evidenced by the thousands of satisfied users of the BFD who have not witnessed any low frequency noise from their systems, I think it's safe to say you have a faulty unit or you have it in the feedback destroy mode......
brucek |
I think in this case, the coupling need not be a low frequency signal, but could be the frequency content contained in the rise time or rep rate of a digital signal and appearing in the <100hz range. Its good to know there are so many that dont have this problem so hopefully I do have a unit with the odd ground connection failure from a poor solder joint or something. The first thing to try to eliminate the possibility of the automatic filters causing the problem which I have not done yet.
thanks again