Results 1 to 8 of 8

Thread: Woofer firing front and back

  1. #1
    Junior Member
    Join Date
    Jun 2017
    Location
    B.C. Canada
    Posts
    45

    Default Woofer firing front and back

    Can someone here explain the benefits of having opposing woofers like say in the esl X & the other models higher up? Does having two woofers make it harder to drive so you need more power? Is it slower because there is more mass?

  2. #2
    Super User Gordon Gray's Avatar
    Join Date
    Jan 2005
    Location
    Alto, NM
    Posts
    3,891

    Default

    Hi Flm,

    Having two woofers helps negates room nodes, standing waves and "smooths out" overall in room bass response. That's why folks often have two subs or more in one system.

    More power? Unknown. Too many factors.

    Hope that helps.

    Best,

    Gordon

  3. #3
    Super User sleepysurf's Avatar
    Join Date
    Jan 2005
    Location
    Tampa, FL
    Posts
    2,372

    Default

    I believe the new opposing woofers in the Masterpiece Series (Renaissance, Expression, etc.) are designed to function as a cardioid sub. See my previous post and following discussion here... http://www.martinloganowners.com/for...l=1#post182844

    IMHO, the bass is much better integrated with the panel than their previous hybrid models.
    Last edited by sleepysurf; 11-19-2017 at 09:31 AM.
    Squeezebox Touch/Bel Canto DAC 3.5VB + Oppo BDP-95 > Conrad-Johnson CT5 preamp and Premier 350 amp > ML Expressions 13A. Dual ML BalancedForce 210 subs. Audience Au24e I/C's, speaker cable.
    Click here to see my entire sytem. Member of the Suncoast Audiophile Society.

  4. #4
    Member
    Join Date
    May 2013
    Location
    Fremont, CA
    Posts
    110

    Default

    I would love to see ML use an open baffle design with a servo amplifier. I think it would blend better with the electrostatic panels.
    Electromotion ESL, Stage, EM-FX2, AV123 MFW-15 with Turbo Kit, Marantz AV7702MKII, Sunfire Cinema Grand 200 Five Series II

  5. #5
    Super User JonFo's Avatar
    Join Date
    Jan 2005
    Location
    Big Canoe, GA
    Posts
    3,574

    Default

    As sleepy points out, the cardioid pattern helps blend with the panels better, they also likely tweak the crossover to adjust phase of the rear-firing woofer to help cancel the lower-end of the panels rear-wave so as to mitigate the downsides of being a dipole. Which is why the new models have much 'fuller' mid-bass.

    ElectronNoob, an open baffle would just persist the downsides of dipole layouts lower in the frequency range, and would not be my choice.
    Jonathan

    System #45 (Monolith IIIx, Sequell IIb, SL3XC)

  6. #6
    Member
    Join Date
    May 2013
    Location
    Fremont, CA
    Posts
    110

    Default

    For OB woofers I think the dipole would actually be a benefit because the dipole radiation would reduce room interaction. The only real downside of OB subs is that they don't play as loud as enclosed woofers.
    Electromotion ESL, Stage, EM-FX2, AV123 MFW-15 with Turbo Kit, Marantz AV7702MKII, Sunfire Cinema Grand 200 Five Series II

  7. #7
    Junior Member
    Join Date
    Jun 2017
    Location
    B.C. Canada
    Posts
    45

    Default

    Will it keep bass more in your room and not to your neighbour's as I live in apartment?

  8. #8
    Super User JonFo's Avatar
    Join Date
    Jan 2005
    Location
    Big Canoe, GA
    Posts
    3,574

    Default

    Quote Originally Posted by Flm09 View Post
    Will it keep bass more in your room and not to your neighbour's as I live in apartment?
    Nope, bass is omnidirectional and at the lowest-end, a pressure wave, which will make things like walls vibrate.

    In your case, what you want is a receiver/processor that features low frequency containment options, such as the LFC in the Audyssey suite. That dynamically limits the low-end such that there is less low-end output during peaks (such as an action movie), without decreasing low end on softer passages. Works well.
    Jonathan

    System #45 (Monolith IIIx, Sequell IIb, SL3XC)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •