preamp knobs?

  • Thread starter Thread starter elicantu
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elicantu

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i recently got a pro mpa art 2channel tube preamp
could someone tell me the HPF knob does and what the PHASE button does?

i think i have some idea what the phase button does like reverses the polarity of something but what does that mean? how does it affect the sound?
 
The HPF should be a high pass filter. Uses, if you are recording something that has no usable information in the lower register you would omit this part of the frequency spectrum using a shelved eq from whatever point you choose and thus would let the higher frequencies pass. hence high pass filter! Mostly used for keeping rumble and handling noise out of the scource. The phase reverse does just that, reverses the phase. Uses, 2 mics picking up the same scource at different distances may be subject to phase cancellation as one waveform reaches the first mic at a diferent part of the cycle that the second mic recieves and when put together there is phase cancellation. the second mic can then be phase reversed to compensate for this. But by no means is that a panacea for incorrect mic placement to begin with but is only a quick fix.
 
peter i think i get what you are trying to say
does it have to do with standing waves at all?
 
peter i think i get what you are trying to say
does it have to do with standing waves at all?
It works around the same priciple of one syne wave's relationship to another in time. But the term standing wave is used to express additive or cancelling phase issues from a reflection of the source wave (either electronically by an impedance mismatch, or airborn by the sound bouncing off of a close surface), as opposed to the waves of two seperate sources of the same material...
 
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