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One for Nick Rhodes or Ron Locke

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

  1. fatrich

    fatrich
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    Hi<br />Nick i know you know quite a bit about kef speakers i will be ordering kef thx speakers this weekend and my question is about the rears the tdm34ds, my room is 12ft6 by 9 ft wide it is a dedicated cinema room i am thinking of using the tdm34's at the side and maybe another pair at the rear of the room iyho do you think the room is too small, and knowing you have two pairs of rears what do you suggest is the ideal height, one last thing am i right in thinking that you have to reverse the speakers on the rear ie right on the left and left on the right why is this ?

    cheers Nick or Ron

    regards

    richard
     
  2. Ron Locke

    Ron Locke
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    Hi,

    The room size looks OK, obviously the levels can be brought down on your processor if you feel they are too much. We also give you the ability to reduce the bass lift via the LF- terminal, this will counteract the bass lift associated with placing speakers on the walls.<br />You are right to presume the rear wall speakers are reverse phased (left to right, and right to left) and should ideally be placed at the same height as the side pair (approx 6ft).<br />I'm sure you know the physics behind dipole speakers, and rest assured that at the THX ranch (USA) they use the TDM34DS as thier reference rear speakers.

    Best Regards

    Ron
     
  3. Nic Rhodes

    Nic Rhodes
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    Richard

    Happy to contribute where I have something to say that will benefit the greater pool of knowledge. I have been quite active on the KEF front recently. Perhaps those freebies from Kef worked!

    One of the beauty things about UniQ is there ability to sound right wherever you place these things. Plonk say a KEF Ref. 3-2 L and R and they will start to sound great. This just doesn’t happen with ordinary speakers. Dipoles are supposed supply sound in an all-enveloping non-directional way. The UniQ does this brilliantly in a dipole. I think this is the reason why this particular model is lauded with praise from all camps, not least THX.

    Dipole placement isn’t that crucial IMHO.

    For the sides:<br />I like the null opposite the listener position. These I like about 2-3 foot above ear level when listening position .I reckon the listening position is 3 foot off the ground. If the sides are placed forward or back from the listening position, say for domestic reasons, and then it is worthwhile pointing the null at the listener if possible. Currently I have the dipoles on a stand at ear level, because of domestic reasons (moving house, every thing in chaos) it still works fine. The wonderful 3d imaging of the UniQ makes this okay. In this respect, non-UniQ speakers just can’t compete. It may not be high on the standard listening judgements for assessing loudspeakers but once you have experienced it, it is difficult to go back again. It is a persuasive argument for UniQ.

    The rears I like at a similar height to the sides and placed at 150 and 210 degrees if the centre is a 0. Does this make sense? The phase of the rears needs to be reversed.

    For a dedicated Home cinema room I would go with 2 pairs of Dipoles, particularly if the room were small, this is when they are much better than direct radiating speakers are. If someone has an interest in multi-channel music then there is some justification for a pair of direct speakers at the rear. Both systems work, it is more a matter of priorities.

    There are no problems re the size of your room. Dipoles though deployed in larger rooms, actually work better than the direct radiating equivalent in smaller rooms. This is especially the case if the listening position is less than 5 foot from the side / rear speakers. This is common in the UK.

    Hope this helps, let know how you get on. I hope you get you dipoles quicker than I got mine! (Sorry Ron, couldn’t resist!).<br /> <img src="biggrin.gif" border="0">
     
  4. Ron Locke

    Ron Locke
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    The brackets for the TDM34's are included in the price and are packed in the same box.<br />The Brackets for the TDM23C and F are £39.99 MSRP.<br />These are available from your nearest authorised KEF THX dealer.

    Best

    Ron
     
  5. fatrich

    fatrich
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    Thankyou gents for the information, i do intend to bracket the front L & R to the wall and the centre on top of the rack and bracket the tdm34's to the sides and rear do you know how much these brackets cost.

    many many thanks again

    regards

    richard
     
  6. fatrich

    fatrich
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    Nick
    My new kef's have arrived today at the shop will pick them up on Saturday just going back to the side and rear speaker positioning you mention about placing them at certain degrees if you have time can you explain it in leymans terms

    much appreciated

    richard
     
  7. Nic Rhodes

    Nic Rhodes
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    Richard

    All I was indicating was if they are on stands and the flat (null) isn't immediately pointing towards you then you might benefit from pointing them at you. If they are going on the wall, don't worry, it just doesn't matter that much.

    Let us know how you get on when they have run in.

    Regards

    Nic

    PS Hope you like them!
     

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