Do you use a Subwoofer when listening to stereo?

Hello hsw,

     Are you stating that you're using a pair of subs and you're hearing or measuring a bass mode between 60-70 Hz at your listening seat? If so, this just means that at least one of your subs are positioned poorly in your room and in relation to your listening position (LP).  Apparently, your LP is in close proximity, or smack dab in the middle of, a bass room mode which is heard as a bass peak, dip or null.
     When utilizing 1 or 2 subs in a room, and the 'sub crawl' method is used to properly position them in the room and in relation to the LP, one of its major advantages is that this method ensures that there are no bass room modes in close proximity to the LP.
      I suggest you google the 'sub crawl method', utilize it to sequentially locate both of your subs.  Then adjust the volume and crossover frequency controls on both to the lowest settings you can while still maintaining bass performance that sounds good to you (it's solid, powerful, smooth, fast, detailed, dynamic, tonally accurate and it sounds natural).   Only once these steps have been completed,  would I recommend measuring your room to verify results.
     One or two subs in a room, provided they are optimally positioned in the room and in relation to the LP utilizing the sub crawl method, are capable of providing good bass performance, that is bass mode free, at a single designated listening position.  If you walk around the room away from the LP, however, you'll notice there are still numerous bass modes at specific spots in the room, heard as bass peaks, dips and nulls. 
    Utilizing 4 subs in a room in a distributed bass array (DBA) configuration in a room are also capable of providing good bass performance that is bass mode free.  But its main advantage is that it'll do so throughout the entire room and not just at a single LP. 
     If you walk around the room away from the LP after a 4-sub DBA  is installed, such as an Audio Kinesis Swarm or Debra DBA system, you'll notice there are no bass modes of any type perceived at any specific spots throughout the entire room.  

Later,
 Tim
    
    

No, and I never will. Now I do use one in home theater and that's where it stays. I'm not into the boom boom boom when listening intently to my stereo. 

No, and I never will. Now I do use one in home theater and that's where it stays. I'm not into the boom boom boom when listening intently to my stereo.

You might want to open your mind a bit on this.  Properly integrated subs can positively transform a 2-channel system.  Companies like Wilson, Vandersteen, etc. don’t offer subs just to add “boom boom boom.”  IME, once you’ve heard a system with good and well-integrated subs you don’t want to listen without them anymore.  They add much, much more than “boom boom.”

No, and I never will. Now I do use one in home theater and that's where it stays. I'm not into the boom boom boom when listening intently to my stereo.

With 4 subs there's no "boom boom boom" in my room.  If that's all you're hearing when you're listening to movies you could benefit from more subs and/or better setup and/or room treatments.  It's kind of like saying "I don't play vinyl because of the noise".

A. TWO Channel Mode/Use of Home Theater:

a1. AVR sends full frequency signals out front left and front right ONLY.

a2. no center, no surround, no sub signals from the AVR outputs.

a3. ALL Imaging is Phantom, created by AVR front left and front right. True whether you do or do not have a sub or two included in 2 channel mode. More below.

a4. programs that ’arrive’ in surround may/often sound better if you try/change to 2 Channel, thus more important than you might think.
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B. SUB(s) ON SURROUND ONLY (sub out, mains only for 2 channel (video or music).

b1. choose mains with enough bass when in 2 channel mode

b2. single sub, non-directional can more easily be successful when on only in surround mode

b3. easiest wiring, simply sub out of AVR to sub, done.
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C. SUB(s) ALWAYS ON (any Surround AND on for 2 channel).

c1. stereo pair of subs, directional, near mains

c2. all imaging is Phantom, any location of low bass fundamentals and overtones will reveal directionality, which you WANT.

c3. Now you need to take your AVR’s front left and front right to a CROSSOVER: ALWAYS send some to the sub(s); ALWAYS send the rest to the mains.

c4. Crossover can be separate component OR built into the sub(s). IF crossover is in the sub, then you have to get to the mains from the subs. This is another reason to use a stereo pair of subs located with the mains.

c5. Any crossover should be ADJUSTABLE for 5.1 or 2 channel

c6. self-powered subs produce the bass, which means the AVR’s amp and front speakers have an easier job to do

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D. SIZE OF MAINS SETTING

d1.Telling AVR the size of your mains effects surround modes only. It always sends full frequency out front left and front right in 2 channel mode.
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E. CENTER CHANNEL SPEAKER REQUIRED for ANY SURROUND MODE

e1. the programs coding, and the AVR's coding removes all the DESIGNATED audio information from the front speakers. Thus, a CENTER SPEAKER is definitely needed, no matter how good you mains are. You cannot make Phantom Center Dialog if the information does not exist in the front outputs.

e2. center channel is ALWAYS OFF during 2 Channel Mode, imaging from front and subs more important.