Monitor 5 Series 2 components confusion
pkquat
Posts: 748
I am in the process of rebuilding my M5 series 2 crossovers. I removed the caps and resistors. The inductors are still attached to the board, but they are only linked to open wires now. Will these wires and board affect the readings? I was surprised by the values. I thought the values would be the M7 series 2 high pass, and 5B low pass.
I did a search for the schematic, here and google, but did not find one. I thought someone had drawn one for the series 2. I think it was a jpg.
Using the the M7 Rev2 schmatic as a reference, the values are listed below (assumed nominal/measured).
C1 = 12 / 13
C2 = 34 / 33
C3 = 8 / 8
R1 = 2.7 / 2.7
L1 = .27 / .28
L2 = 1.75 / 1.8
Both inductors values don't seam to make sense with the rest of the components. Has anyone checked these values before?
I did a search for the schematic, here and google, but did not find one. I thought someone had drawn one for the series 2. I think it was a jpg.
Using the the M7 Rev2 schmatic as a reference, the values are listed below (assumed nominal/measured).
C1 = 12 / 13
C2 = 34 / 33
C3 = 8 / 8
R1 = 2.7 / 2.7
L1 = .27 / .28
L2 = 1.75 / 1.8
Both inductors values don't seam to make sense with the rest of the components. Has anyone checked these values before?
Comments
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Are you planning on new inductors? If not just get the same value caps and go. Polk is well known for changing up on the fly so you never know.
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I am not planning on new inductors. I know they change things up, but often there are common combinations. These values are quite different, and well outside a 10% range. I would think sonically they would be radically different. Maybe it is only shifting the crossover point. If so, why?
I wish I had a program to calulate the crossover curves. I've assumed the 34 uF, 1.55mH and 27uF, 1.75mH combinations produced similar curves. This is a 34 , 1.75mH combination.
