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SOLD Fdeck HPF-Pre Series 3

Discussion in 'For Sale: Effects and Pedals' started by twinfallsbass, Jun 13, 2018.


  1. twinfallsbass

    twinfallsbass Supporting Member

    Jan 24, 2005
    Somewhere in AZ
    Price:
    $85
    Location:
    Arizona
    77C1F6E1-1111-4283-8FB6-8425AF1ED22F. 9C7600A7-B503-4387-868D-83332AE3685A. F731E03F-0D5D-4FE1-AFC1-8471F494844F. C38FAE3A-9436-4EA1-915E-F50390E91A02.
    Hi. For sale is my only used twice HPF-Series 3. Near mint condition and includes original operating instructions. These are all the rage right now and a VERY useful tool in your signal chain. Only getting rid of because I bought a Broughton HPF. Below are the specs. These never last long here on the classifieds, first come first serve. $85 shipped to lower 48.

    “ The "12+12" filter curve is two filters in one. The first filter has a fixed corner frequency of 35 Hz, and 12 dB/octave slope. The second filter is adjustable from 35 to 140 Hz, and also has a 12 dB/oct slope. Thus it always has 24 dB/oct slope below 35 Hz. I designed the Series 1 and 2 filter (same circuit in both) for double bass amplification, to tame the infrasonic "thump" produced by the acoustic instrument, which interacts poorly with the low frequency excursion behavior of ported speakers. Interest in a 24 dB/oct filter came from electric bassists who are experimenting with the latest high-performance speakers, to avoid driving the system at frequencies below the port tuning frequency. I designed the "12+12" filter with the same input conditions and "front panel" as Series 2, so that either could be used for double bass

     
  2. Brennan

    Brennan Supporting Member

    Sep 29, 2004
    Minneapolis
    Pm sent
     
  3. twinfallsbass

    twinfallsbass Supporting Member

    Jan 24, 2005
    Somewhere in AZ
    No International shipping, sorry.
     
  4. s_wood

    s_wood Gold Supporting Member Supporting Member

    Mar 23, 2003
    Delaware (USA)
    PM sent
     
  5. twinfallsbass

    twinfallsbass Supporting Member

    Jan 24, 2005
    Somewhere in AZ
    Sold