=0A=0A=A0 =0AHi Chris,=0A=0A=A0=A0=A0=A0=A0reading your response to David r=
egarding Geoffreys inquiry about a damping resistor, you say that the Rober=
ts circuit will lower the frequency response x 10 but I thought I read it w=
as x 4 or 5 for a geophone?=A0 Do you know of ANY other 'bass boost' analog=
 seismo amp? I do have Mariotti's EQ PCB unassembled,=A0but I am wondering =
what it will do for an=A0SP instrument with a natural period of 5 sec. Will=



 
Hi Chris,


     reading your response to David regarding=
 Geoffreys inquiry about a damping resistor, =
you say that the Roberts circuit will lower the frequency response x 10 but=
 I thought I read it was x 4 or 5 for a geophone?  Do you know of ANY =
other 'bass boost' analog seismo amp? I do have Mariotti's EQ PCB unassembl=
ed, but I am wondering what it will do for an SP instr=
ument with a natural period of 5 sec. Will it give me 25 sec. or 50 possibl=
y?

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