Quote:
blaser wrote:
 Dear Wayne,
Since I have built my dual 18s subs, I have powered them with about 4KW RMS. The subs can go very loud and deep. I once changed the setting of the BFD to +4dBu, but I noticed there was a hiss coming out of the subs when the amps are maxed out.
I have discussed this matter with some known names in this industry and we concluded that the +4dBu setting will have greater dynamic range, but when using a strong amplification, the noise will become audible...and therefore I had to apply the -10dBu setting to have the noise down.
But thanks to the equ. flexibility, one can have any desired output level. In my case, I applied +3 db at 25.9 Hz with the widest Q of the BFD 2496, and this raised the output by 3 db everywhere.
So I guess this can be the trick, people who desire to raise of cut the output level could chose to do as I did, take FRs, LFs and it is magically done  |
Hi Ahmed,
I can't be 100 % certain but I think the hiss you were experiencing wasn't caused by the BFD per se. I'm blaming your amps instead.
I can say it because I too own one.
I too get a hiss unless I lift the ground on the amp. The TA2400 has a switch for this but for some strange reason it doesn't necessarily work. So try it first but if it doesn't work, just tape the ground prongs (yes, I know it CAN be dangerous) on the wall socket or buy a so-called "cheater plug" (it is possible that they aren't available there).