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M&K MX-350MKII THX

Discussion in 'Home Cinema Speakers' started by gwbailey, Sep 26, 2001.

  1. gwbailey

    gwbailey
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    Does anybody know how close the MX-350MKII THX (sound wise) is to the MX-150MKII THX? I think spec wise they're pretty much the same other than their power! so I'm wondering if the 350 is worth the extra cost. Even more so if I plan to use two (which I probably will in the future) but my problem is that my room is only 4m & 3m. So which would be better, two 150's, one 350 or even two 350's, maybe two Paragidm servo 15's would be better still?(I know Nic rates them very high!) I don't know about the Servo 15's as I've never seen any where I live.

    Also, I've just had a demo on a MX-350 MKII THX, and the bloke said that the MX-350 was firing out of PHASE with the front three (M&K 150P THX) speakers! what does that mean?

    Am I right in thinking that they've changed over the RCA jacks on the back of the SUB, so that the POSS goes into the NEG and vice versa?

    If so why? what would you gain?<br />And is it common?

    Cheers,
     
  2. Dan_BlitzedS14

    Dan_BlitzedS14
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    There's more than enough difference to justify the extra cost, that's for sure. The extra power of the MX350 gives much better control over the sound, wheather it be at high or low volume. MX350 allows you to tune the bass to the room more effectively, using the cut-off adjuster on the back. It also has a "bass extension" switch.

    Ultimately, the best set up there would be 2 MX350's, but in a room of your size I would say that 1 would be fine. I generally think 2 subs are better than 1, but in your case I would certainly go for the MX350 just on the basis of the extra control and the finer adjustments that can be made when setting up. Once you have 1, you can then decide if you want to add another at some time in the future.

    If a speaker is "out of phase", it means the timing is out. With a sub sat system, this means that the bass arrives at your ears after the rest of the frequencies, so bass will sound like it's slow and lagging behind the rest of the music/soundtrack.

    To change the "phase" you can change the possitive and negative connections at either the speaker end, or the amp end. In this case though, due to the M&K S150P's being Active and given that they only have a single RCA input, or Balanced input, for connection straight from the Processor (instead of speaker terminals), the way to change the phase is by use of a switch on the back of the subwoofer itself. It is a simple "up" or "down" positioned switch and makes it easy to set the phase correctly. Play some music you know very well, something that has a steady beat, sit in your listening position and if the bass feels like it's lagging behind, then it's out of phase, so move the switch into the opposite setting.

    It's very common. All subs can have the phase adjusted in some way. In car hifi, it's common to have a speaker on one side out of phase with the speaker on the other side. This is obviously an extreme case due to limitations of positioning in a car. If you saw the M&K S150P's with the grills off, you will have noticed small rectangular pieces of foam between the drive units. This is to prevent "off-axis lobing", which results in "sweet and sour" spots in the room where the sound becomes dead and flat because it appears out of phase with the sub. Just thought you might like to know. <img src="biggrin.gif" border="0">

    Hope this helps.
     
  3. gwbailey

    gwbailey
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    Thanks Dan, You're right I would like to have two 350's but they might be much for my small room!

    Probably buy one first then see how it goes....

    As for "out of phase" I'll give it a try when I've saved up enough pennies to get the 350!

    I wonder how many people on here have their subs "out of phase"?

    Cheers,

    [ 30-09-2001: Message edited by: gwbailey ]</p>
     
  4. Lowrider

    Lowrider
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    I don´t know any of those speakers, what I know is that the image ang quality of the sound improved a lot when I added a second speaker...
     
  5. Lowrider

    Lowrider
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    Of course I mean subwoofers <img src="graemlins/blush.gif" border="0" alt="[Blush]" />
     

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