Why would you want to use di-pole's?

U

uncle eric

Guest
Just like to hear some general thoughts on this provocative subject. How many of you guys are using di-poles and why?
 

Phil Hinton

Editor
Staff member
I am using Boston pro THX dipoles at the moment.

I have to say that i prefere the more dispersed rear channel sound, it just sounds so much more natural for rear pans and stereo effects.
With direct radiators(mono poles) the sound is far to directional IMHO, and on rear pans the image tends to fall apart for me.

Oh eric, these are going soon and I will need Tripoles for the rear channel, [email protected] afford the SS150, so what do you recommend to use with the 1510's. I did think about the gallos, but as you can tell from the above, i prefere the dipole tripole approach.
 

baileych

Standard Member
Because I prefer the sound.

(The answer to any personal HiFi question :p)

I think that they suit some particular setups (e.g. mine) where the room (for WAF/GAF reasons) cannot be setup like the ultimate audio audition room.

I used to use direct radiators (B&W DM601S2) behind the left and right corners of the sofa. However, because the sofa is quite close to the rear wall these ended up being very close to the sofa. This resulted in the effects being localised too strongly to either the left shoulder or the right shoulder.

Also because I am much further from the front speakers than the rear ones front to back panning had that 'oh, now the sound is moving to the rear speakers' effect.

I find now with mission 78ds speakers mounted on left and right walls (if only the rear wall wasn't a window I could move to 7.1 ...) that the integration with the front speakers (despite now being a different make etc.) is much better and effects pans from left to right (or vice versa) at the back are more even.

If I could move the sofa forward (reducing effective size of room :( so that rear direct radiators could actually form a stereo image, unlike when they were too close to the sofas, then some of the problems which prompted me to switch to dipoles [should say bipoles] would probably go away.

I do find that dipoles [bipoles] are not as diffuse as some make them out to be. If you believe the hype surrounding some models you'd have thought that you couldn't tell where the sound was coming from. Of course this isn't true, and you wouldn't want it to be - all that surround processing wasted! A sound from a dipole [bipole] behind your left shoulder sounds like it's coming from somewhere over your left shoulder, it's just that it doesn't sound like sound coming from directly over your left shoulder.

Charles.
 

buns

Banned
simple, because, at the time when i purchased, i didnt know much so i just did as advised! I dont know anything other than dipoles for rears

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Mark Ward

Active Member
Direct firing surrounds are too directional for me too. My TDMs were a revelation to my then Denon AV-A10SE setup. I actually gained a decent soundstage with depth. I'm a 98% Movies 2% Music person and the diffuse sound is exactly right for me.

However... Now I have a Lex I'm curious to try direct radiating speaker all around again.

I would imagine in the perfect room environment you could achieve the very best results with direct firing, but with the limitations most of us have to live with di-poles cover up a lot of the flaws in the soundstage caused by speaker positioning compromises.

Mark.
 
S

Stewart C

Guest
I use my M&K SS-150THX in tripole mode (I know this is a dipole thread) but in tripole they operate in dipole too.

The dispersion is superb I don't like a too direct radiating surround effect as I feel it is far too processed and unnatural.

The tripole gives me a certain degree of directionality but the dipole speakers give me the feeling that all things around are caving in on my head.

Regards
 

Rob

Active Member
I too use 2 sets of TDM34s, although I run my back pair as bipoles. Problem is, you are supposed to sit in the 'null' with dipoles. Not a problem for side mounting, but pretty much impossible if you are using 2 back speakers. I'm very happy with the results.

I've tried monopoles all round, but just don't like them. I find the effects too distracting, The idea is that your attention should be focused toward the screen, ie the front of the room with the rear used mainly for effects/ ambience etc. (my opinion anyway!)

Rob.
 

Steve.EX

Active Member
Similarly i too use two pairs of TDM 34's and would not change them for anything less!!!. I have tried/owned quite expensive mono-pole speakers for rear/back duties and prefer di-pole by a clear mile.

Steve.
 
D

Dom H

Guest
I find 2 direct radiators placed inline, about 1m above ear level, toed in ever so slightly to give the perfect compromise between directionality and ambience.

Plus it helps the 'top half' of my room is fairly hard surfaced helping ambience while the bottom half has lots of soft furnishings/diffusion to benefit the mains.
 

Jase

Distinguished Member
I was using Kef THX dipoles until recently but have switched to M&K S85´s (pointing backwards and at an angle to disperse the sound off walls). The dipoles did a very good job at dispersing the sound well, quite liked them to be honest. Hope to get some M&K tripoles next & get the best of both worlds.:)
 

buns

Banned
Has anyone tried using monopoles firing into a corner? I cant remember who suggested it to me, or perhaps i thought it up myself (it sounds daft enough!).

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Jase

Distinguished Member
Originally posted by buns
Has anyone tried using monopoles firing into a corner? I cant remember who suggested it to me, or perhaps i thought it up myself (it sounds daft enough!).

Its not as daft as you´d think, certainly worth a try, long as the speakers aren´t right in the corner, have them a couple of feet away. Mine are sort of firing at the corners. Works pretty well.:)
 
E

eyerish

Guest
Hi all!
I`m using B&W DS#6 THX dipole surrounds and I can only say that they sound fantastic when given the right space from rear wall and directly in line with listener. Now I have a problem though. Changing living room to dedicated HT room from 5.1 to 7.1 sound. Damn chair will only be 2 feet from rear wall, and window on one side and arch on the other so can`t put them there. Will use dipoles for surround back with polarity reversed. Any one any ideas on other makes and models to try out.
 

dts_boy

Well-known Member
i'm another using m&k ss150 in tri-pole operation. i did spend the time however, experimenting with the different se up options and in my case it sounded best as a tripole. its just a little more atmospheric when you can't pin-point the sound coming from the rear left/right channel!
 

Phil Hinton

Editor
Staff member
Eric,

I am interested in hearing your Reply to this thread, and what your reasoning behind Not liking di-poles, If you have a spare 5 mins.;) :D
 

russraff

Member
I used to have Boston THX surrounds, but sold them a few weeks back. I now have an NHT speaker package that has direct rear speakers. I have always had dipole rears, and to me the direct rears are much better: more focused as you'd expect. Certain films, normally score heavy like LOTR, are more "alive" in the room.

Russell
 
S

stranger

Guest
Originally posted by baileych
Because I prefer the sound.

(The answer to any personal HiFi question :p)

I think that they suit some particular setups (e.g. mine) where the room (for WAF/GAF reasons) cannot be setup like the ultimate audio audition room.

I used to use direct radiators (B&W DM601S2) behind the left and right corners of the sofa. However, because the sofa is quite close to the rear wall these ended up being very close to the sofa. This resulted in the effects being localised too strongly to either the left shoulder or the right shoulder.

Also because I am much further from the front speakers than the rear ones front to back panning had that 'oh, now the sound is moving to the rear speakers' effect.

I find now with mission 78ds speakers mounted on left and right walls (if only the rear wall wasn't a window I could move to 7.1 ...) that the integration with the front speakers (despite now being a different make etc.) is much better and effects pans from left to right (or vice versa) at the back are more even.

If I could move the sofa forward (reducing effective size of room :( so that rear direct radiators could actually form a stereo image, unlike when they were too close to the sofas, then some of the problems which prompted me to switch to dipoles would probably go away.

I do find that dipoles are not as diffuse as some make them out to be. If you believe the hype surrounding some models you'd have thought that you couldn't tell where the sound was coming from. Of course this isn't true, and you wouldn't want it to be - all that surround processing wasted! A sound from a dipole behind your left shoulder sounds like it's coming from somewhere over your left shoulder, it's just that it doesn't sound like sound coming from directly over your left shoulder.

Charles.
the mission 78DS are bi-poles.
 

Phil Hinton

Editor
Staff member
Eric,

Once again, a fine post with well thought out arguements, and as always you are tempting me to experiment, and spend MORE money:eek: So that will be two more 1510's then:eek: :rolleyes:
 

JSW

Well-known Member
Hi Eric, same sentiments as THX 1138 but in our small/average sized living rooms especially ones with minimalist furniture, wouldn't di-poles be better suited to us ??

Im considering getting the Mordaunt Short THX 506's so would like more views on this.
 

Phil Hinton

Editor
Staff member
I think the MS 506 will be a good addition to your system, but experiment first.

I like dipoles, but have two kef speakers spare and tried to experiment a little with the Monopole idea, I am still undecided and have asked eric to take a look at some photos of my room and give me some ideas on placement..

If I like the result then I may go and buy two more 1510's for the rear duties. I will wait and see what my experiments uncover.

But I would always say, what sounds right to you, is right.
 

Nic Rhodes

Distinguished Member
Another di-pole fan here, in fact I have two pairs like many here. I also have some conventional speakers for rear and side duties. I generally prefer the dipoles but I quite like the THX2 solution with dipoles on sides and conventional rears.
 

petrolhead

Well-known Member
Need education

Mono Plole - Single Speaker
Bi Pole - 2 speakers
Tri Pole - 3 speakers

But what the heck are Di Poles????:confused:
 

Phil Hinton

Editor
Staff member
Same as Bi poles, but; dipoles out of phase, Bi poles in phase.
What this means is that in dipoles the sound is diffuse and the drivers work against each other,out of phase. Bipole gives a more focused sound as the drivers work together, in phase.

Polk audio make some dipole/bipole duel units.
 

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