General passive-line level filtering issues. (BD-Design)

by PeterSt. ⌂ @, Netherlands, Tuesday, February 12, 2008, 09:53 (5890 days ago) @ Cappy

Stephan,

You said:

"The biggest amplitude is in the bass - so if there occurs clipping it
will happen there first and produce harmonics. So I filter the main-amp at
the input, that it has to produce no bass."

I'm not sure how your system is set up but for most of us we have speaker
level outputs into solid state bass amps. There is a passive filter
between the main amp and bass amps. So the bass that the main amp is
producing is into a very easy, high impedance load. The bass character is
heavily influenced by the main amp, but the main amp will never strain to
produce bass frequencies.

It works very well unless there is too much low frequency noise in the
system, since any noise will be amplified by the main amp and bass amps.

Hi,

I agree with this. Additionally it may be good for understandings that the amplitute -like Stephan mentioned- from bass waves is not larger at all (opposed to the higher frequencies). For this matter IMO clipping won't be a problem, or no "additional" problem anyway. What would be true though, is that bass waves sustain longer, and therefore require more power in one go (large elco's etc.). But, power for what ? these waves are just passed through to the bass amp, and no large stiff diaphragm has to be sustained in any position etc. by the main amp. So indeed, there is no load.

Peter

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