Two subs vs two towers.

Discussion in 'Archived Threads 2001-2004' started by Chris PC, Jun 1, 2002.

  1. Chris PC

    Chris PC Producer

    Joined:
    May 12, 2001
    Messages:
    3,975
    Likes Received:
    1
    Trophy Points:
    0
    If placeing two subwoofer in two different locations is not optimal because of cancelations, then what about my two towers that go down to 32 hz -3dB? I know I've asked this before but now its bugging me. Sometimes I hear the bass notes well, and other times not. I guess i should experiment with placement?

    If two subs in different locations has drawbacks, then why get towers that go so low? Aren't I dealing with the same problems?
     
  2. Michael R Price

    Michael R Price Screenwriter

    Joined:
    Jul 22, 2001
    Messages:
    1,591
    Likes Received:
    0
    Trophy Points:
    0
    This is why it's usually best to set your speakers to small and produce the bass from one place. Yes, there will be bass interactions between your towers.

    People don't just buy towers for the bass. But that's another story which has been argued to death lately.
     
  3. Wayne A. Pflughaupt

    Joined:
    Aug 5, 1999
    Messages:
    6,123
    Likes Received:
    40
    Trophy Points:
    6,610
    Location:
    Katy, TX
    Real Name:
    Wayne
     
  4. Chris PC

    Chris PC Producer

    Joined:
    May 12, 2001
    Messages:
    3,975
    Likes Received:
    1
    Trophy Points:
    0
    Fair enough. And I know I have been responsible for arguing this two. The point is, I often listen to my towers without my subwoofer. This means that people who own tower speakers but do not own a subwoofer will always have less than optimal bass. I find that goofy because tower speakers are always sold in pairs with two sources of bass.

    To me, this conflicts at least partially with the argument that you should have towers which have low bass response, those towers will have potentially ragged response down there because of their different locations.

    Can you use an EQ to smooth out the sound of a pair of towers? Are there any thing worth looking at to try to minimize the affect of the less than ideal bass response of two towers?
     
  5. Wayne A. Pflughaupt

    Joined:
    Aug 5, 1999
    Messages:
    6,123
    Likes Received:
    40
    Trophy Points:
    6,610
    Location:
    Katy, TX
    Real Name:
    Wayne
     
  6. BruceD

    BruceD Screenwriter

    Joined:
    Apr 12, 1999
    Messages:
    1,220
    Likes Received:
    0
    Trophy Points:
    0
    To take a slightly different tack than Wayne, you could use an active electronic xover just before the main L&R amp inputs that splits the signal into two parts, 1) the high-pass to the main L&R amp inputs, and 2) the low-pass to a Parametric EQ and then on to the sub(s).

    I've been doing this with my main speakers - Dynaudio Contour 2.8 towers - and an M&K sub for the last 3 years with great success. This works great for both 2-channel music and HT.
     
  7. Chris PC

    Chris PC Producer

    Joined:
    May 12, 2001
    Messages:
    3,975
    Likes Received:
    1
    Trophy Points:
    0
    Lets assume a system with no subwoofer. I am curious mainly about a pair of towers alone and no subwoofer. I guess I should have stressed I am talking about towers alone that go low. NO SUBWOOFER. I already know the way to EQ the subwoofer, as I asked you folks those questions many times and you've all given me more than ample suggestions and I thank you for that [​IMG]
    Its just that I listen to my fronts alone sometimes and quite frankly, I am just generally curious about how towers are supposed to work alone. We'll use my towers for example, PSB Image 6T. If they are rated down to 32 hz -3 dB but you place them as most people place a pair of speakers, you really aren't getting the best bass because of the cancellations and interference of the two towers at, say, between 30 and 100 hz etc. So I guess regardless of whether or not your position options are limited, you should still try to experiment with your towers.
    So with that in mind, I am just wondering how best to flatten your in room bass response from a pair of towers such as mine.
     
  8. BruceD

    BruceD Screenwriter

    Joined:
    Apr 12, 1999
    Messages:
    1,220
    Likes Received:
    0
    Trophy Points:
    0
    Chris,

    My Dynaudio's have the same -3dB at 32Hz and the reason I use the sub is because you can't get great bass and imaging simultaneously from the optimum main speaker location for imaging.

    As a benefit, the xover helps increase the clarity from the main's mid-bass/mid-range driver because it reduces IM distortion from the bass/mid-bass driver by filtering out the low bass.
     
  9. AntonS

    AntonS Stunt Coordinator

    Joined:
    Dec 18, 2001
    Messages:
    164
    Likes Received:
    0
    Trophy Points:
    0
    Why do you think the low waves that the towers produce would be cancelled? The waves are coming forward from the same plane. There is no way they can cancel themselves. You got cancellations if the waves are reflected (let's say from the back wall) and will be coming the other way towards the speakers in the opposite phase. But you can have the same effect with a single bass source (subwoofer).
     
  10. Chris PC

    Chris PC Producer

    Joined:
    May 12, 2001
    Messages:
    3,975
    Likes Received:
    1
    Trophy Points:
    0
     

Share This Page