About the F-MODS
Simply plug F-MODS crossovers in-line with the patch cords feeding your amplifier. They filter out unwanted frequencies, with a 12 dB per octave slope. Low-pass models let frequencies below the cut-off point through and filter out the highs. High-pass models let frequencies above the cut-off point through and filter out the lows.
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More details on the F-MODS
Overview: The F-Mod (filter module) is an active crossover simulator, made by Harrison Laboratory, that connects in-line with your RCA patch cords. They require no power, and can be combined with other types of crossovers to change the slope and crossover frequency point. F-Mods have virtually no noise or distortion, and do not cause turn-on thumps. F-Mods can handle a maximum signal of 10 volts RMS, and have a slope of 12dB per octave.
Construction: The F-Mod is made of brass with 24 kt gold plating.
Color Codes: The manufacturer's label is silkscreened on the barrel of the device in two colors. A red label indicates a high pass filter, while black indicates a low pass filter. A colored ring near the male RCA end of the barrel indicates the frequency of the filter (-3dB). There is a frequency increase at 10K ohms (8% Low-pass, 25% High-pass) and a frequency decrease (8% Low-pass, 15% High Pass) at a 47K ohm load. A high-pass F-Mod and a low-pass F-Mod can be combined for bandpass operation.
Frequency Codes: The available F-Mods frequencies are:
|Frequency||Band Color||Frequency (Low Pass)||Frequency (High Pass)|
|50 Hz||Brown||54 Hz||46 Hz||62 Hz||43 Hz|
|70 Hz||Purple||76 Hz||65 Hz||87 Hz||60 Hz|
|100 Hz||No Band||108 Hz||92 Hz||125 Hz||85 Hz|
|200 Hz||Blue||216 Hz||184 Hz||250 Hz||170 Hz|
|500 Hz||White||540 Hz||460 Hz||625 Hz||425 Hz|