FMOD ™ Inline Audio Crossover Low Pass Filters (Gold Finish)
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FMOD ™ Inline Audio Crossover Low Pass Filters (Gold Finish)
Product Details
🇺🇸 MADE IN THE USA 🇺🇸
Standardized at 22K ohms and a -3db frequency point.
Refine your bass and eliminate unwanted high-frequency interference with the Harrison Labs Low Pass FMOD. Featuring a precise 12 dB per octave slope, these passive RCA line-level crossovers (sold in pairs) are the ultimate solution for filtering out mid-range "vocal bleed" before it reaches your amplifier. By acting as a high-quality inline filter, the Black Label FMOD ensures your subwoofers deliver a tighter, more focused low-end response for a cleaner audio experience. These filters are available in a premium Gold finish or the sleek Platinum Edition (silver) finish, offering the same high-performance engineering in a sleek silver look to match your system’s aesthetic.
Choosing the Right Low Pass Frequency
For peak system performance, selecting the correct frequency is essential. If you are undecided between two frequency values for your low pass crossover, the professional recommendation is to err on the side of the lower value.
Selecting the lower frequency provides a tighter safety margin, ensuring your subwoofers only reproduce the deep bass frequencies they are designed to handle. This results in a more refined output, improved signal clarity, and superior protection for your subwoofers and amplifiers.
Harrison Labs · FMOD Series
Color Code Guide
Every FMOD inline crossover filter is marked with a color band mapped to a standard crossover frequency. Red labels are high pass, black labels are low pass. Tap a band to see its exact −3dB spec at 10K and 47K ohm loads.
20Hz crossover
black band · high pass only
Low Pass
Not offered in this band
High Pass
25Hz @ 10K Ω
17Hz @ 47K Ω
30Hz crossover
2 black bands · high pass only
Low Pass
Not offered in this band
High Pass
37Hz @ 10K Ω
26Hz @ 47K Ω
50Hz crossover
brown band
Low Pass
54Hz @ 10K Ω
46Hz @ 47K Ω
High Pass
62Hz @ 10K Ω
43Hz @ 47K Ω
70Hz crossover
purple band
Low Pass
76Hz @ 10K Ω
64Hz @ 47K Ω
High Pass
87Hz @ 10K Ω
60Hz @ 47K Ω
80Hz crossover
2 purple bands
Low Pass
86Hz @ 10K Ω
74Hz @ 47K Ω
High Pass
100Hz @ 10K Ω
68Hz @ 47K Ω
100Hz crossover
no band
Low Pass
108Hz @ 10K Ω
92Hz @ 47K Ω
High Pass
125Hz @ 10K Ω
85Hz @ 47K Ω
150Hz crossover
2 blue bands
Low Pass
162Hz @ 10K Ω
138Hz @ 47K Ω
High Pass
187Hz @ 10K Ω
128Hz @ 47K Ω
200Hz crossover
blue band
Low Pass
216Hz @ 10K Ω
184Hz @ 47K Ω
High Pass
250Hz @ 10K Ω
170Hz @ 47K Ω
300Hz crossover
2 white bands · high pass only
Low Pass
Not offered in this band
High Pass
375Hz @ 10K Ω
255Hz @ 47K Ω
500Hz crossover
white band
Low Pass
540Hz @ 10K Ω
460Hz @ 47K Ω
High Pass
625Hz @ 10K Ω
425Hz @ 47K Ω
1kHz crossover
light blue band
Low Pass
1.1kHz @ 10K Ω
920Hz @ 47K Ω
High Pass
1.25kHz @ 10K Ω
850Hz @ 47K Ω
2.5kHz crossover
light green band
Low Pass
2.7kHz @ 10K Ω
2.3kHz @ 47K Ω
High Pass
3.13kHz @ 10K Ω
2.13kHz @ 47K Ω
3.5kHz crossover
gray band
Low Pass
3.78kHz @ 10K Ω
3.22kHz @ 47K Ω
High Pass
4.37kHz @ 10K Ω
2.98kHz @ 47K Ω
6.5kHz crossover
orange band
Low Pass
7kHz @ 10K Ω
5.98kHz @ 47K Ω
High Pass
8.12kHz @ 10K Ω
5.5kHz @ 47K Ω
How to read this: the color ring indicates the Harrison Labs standard crossover frequency at the −3dB point, standardized at 22K ohms. Expect an 8% (LP) / 25% (HP) increase at 10K ohms, and an 8% (LP) / 15% (HP) decrease at 47K ohms.
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