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) |
|@10K ||@47K ||@10K ||@47K |
|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 |
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