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I finally added a second REL Sub

It's taken me years to get to this point.  Subwoofers were 2-channel system blasphemy when I was coming up in the hobby.  As of today, I now have 2, REL T9is.  They are providing sub-bass and filling out the picture for Klipsch Cornwall IVs.  Even with a loudspeaker as massive and efficient as the Cornwall IV, they fill things out nicely.  

How pleasing it was to hear the two in unison.  I run them so low on crossover and volume that the only thing you hear is sweeter more extended highs against a fuller picture down low.  They are simply not audible in their own right.  Yes, it's true--good sub bass management helps treble and midrange.  

As a hack musician of 20 years or so, I can tune them by ear when I hear a well recorded kick drum, bass guitar and horns.  I tried tuning with mics and software but the good ol' ear does very well here.  

If you're on the fence about one or maybe a second you owe it to yourself to try it.  Is SWARM next? Doubtful.  This is, however, very pleasing indeed. 
jbhiller

Showing 1 response by mijostyn

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mijostyn
8,570 posts
 
@james633 , You have exactly the right approach. All systems using subwoofer miss more than 1/2 the benefit by not using a high pass filter on the main speakers. It can be as simple as adding a series capacitor to the input of your amp. You just have to know the input impedance of the amplifier. f = 1/2piRC  or C = 1/2piRf.  R is in ohms and C is in Farads so you have to convert to micro and picofarads. Order the right cap from Digikey. They might cost you $10 at most. 

Next you can get either an analog or digital 2 way crossover and bypass whatever comes in the subwoofer. I like 12 dB/octave in analog crossovers. I use 48 dB/octave digital. 
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