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Harrison Labs FMOD Inline Crossover Pair 20 Hz High Pass RCA

Overview
FMODs are packaged in pairs and can be combined with other FMODs to obtain bandpass ranges or with other types of crossovers.
Part # 
266-246
Weight: 0.09 lbs.  
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Part # 266-246
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Product Details

Harrison Labs FMOD Inline Crossover Pair 20 Hz High Pass RCA
What is an FMOD? The FMOD is an active crossover simulator. It is better than a much more expensive electronic crossover that requires power to operate. FMODs are packaged in pairs and can be combined with other FMODs to obtain bandpass ranges or with other types of crossovers to change the slope and crossover frequency point. FMODs feature a 12 dB per octave crossover slope and are compatible with all RCA type input amps...simply place the FMOD in-line with the patch cable running between the source (head unit) and the amplifier. 24 kt gold over brass construction, 10 volts maximum RMS input. One-year manfacturer warranty. Made in the U.S.A.


Product Specifications
  • Crossover TypeHigh Pass
  • ConfigurationInline Line Level
Harrison Labs FMOD Inline Crossover Pair 20 Hz High Pass RCA
  • BrandHarrison Labs
  • Part Number266-246
  • UPC844632053115
  • Product CategoryIn-Line Crossovers
  • Unit of MeasureEA
  • Weight0.09 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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Harrison Labs FMOD Inline Crossover Pair 20 Hz High Pass RCA

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Harrison Labs FMOD Inline Crossover Pair 20 Hz High Pass RCA

How much attenuation at 20hz? And...

I'm wondering if this is -6dB@20hz? -3dB@20hz? Begining to rolloff at 20hz?Also, can these simply be placed in series to increase the slope? Is a pair in series a 24dB/oc slope, or something else?Thank You,Eric
Asked by: mdocod
A high pass filter at 12db per octave almost always has a minus 3db down point at the crossover point. This is so the low pass rated also at the same crossover point assuming a 12db per octave---will sum the two filters providing a smooth transition from woof to mid/tweet. In your case--plan on -3db at 20Hz-- -15db at 10hz. The whole point is to reduce "subsonic" noise from distorting the sound without any noticeable sub-woof loss. I don't know what the slope would be if loaded in series or parallel. Stay within the +10db limit at this filter's input. Good project!
Answered by: Joe from San Francisco
Date published: 2013-09-12

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