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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
jbhiller's avatar
jbhiller OP
1,446 posts
 
@rauliruegas ,  Always good to hear from you Raul.  I think I understand what you are saying. Specifically, you (and your thread) like to hear and see that users allow more overlap on the crossover between what the subwoofer puts out and what the loudspeaker puts out.  I appreciate that.  

I just don't prefer that sound (without using a dedicated external crossover) because I don't want the Class D amps in the subwoofers taking over too much.  I use a tube amp and unless I could cut the loudspeakers off higher with a dedicated crossover, like you suggest, I don't prefer that much overlap.  
ozzy62's avatar
ozzy62
3,390 posts
 
Personally, I'm more interested in here's a before and after thread - show us something interesting.

@golfnutz I'm pretty sure no one cares what interests you. Are you a new member of the Thread Police?

Oz


golfnutz
231 posts
 
'Pretty Sure", like Tracy Morgan 'Pretty Sure'?

jbhiller's avatar
jbhiller OP
1,446 posts
 
Oz,  be careful buddy!  Your subs don't look set up with way some may want so they must sound terrible. HA!!!!


mijostyn's avatar
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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