Wide dispersion rear surrounds

[cavedriver]

Go for omnidirectional if you want maximum dispersion! I'm hoping to test some Duevel Planets next week, but note they are towers:

Duevel Planets - omnidirectional highend audio home speaker

the only one high-end audio horn-speakers with a perfect omnidirectional character, like the acoustical ideal of a point source, with a new quality of natural music reproduction.

www.duevel.com

 

[jhaider]

Go for omnidirectional if you want maximum dispersion! I'm hoping to test some Duevel Planets next week, but note they are towers:

Duevel Planets - omnidirectional highend audio home speaker

the only one high-end audio horn-speakers with a perfect omnidirectional character, like the acoustical ideal of a point source, with a new quality of natural music reproduction.

www.duevel.com

I used to use KEF speakers firing up for sides and rears. I found with the fairly narrow dispersion coax they were too easy to locate when used normally. I stopped that when immersive came onto the scene and switched to wider dispersion speakers, because intuitively it seemed wrong to have upfiring bed speakers and discrete heights. Admittedly I never actually tried it.

 

[Dj7675]

Good idea. I would have to cut back to the cost and go with the JBL CBT50LA-1. The 70 are just too rich for me blood.

May I ask what your other speakers are and how they work together tonally?

I am using the CBT50LA-1 for front wide and they work nicely.

I'm really glad you pointed that out. Crowns fan noise spec is 45dB @ 1m so I didn't give it a second thought. MLP is 2m; do you think it would be noticeable?

I have been playing around with a Crown DCI 4|300 with a 708i. Like already noted, it really isn't an option to put in a room with you due to the fan noise. For the CBT 50 I am just using a Buckeye NC252 based amp to run them and works great. Using the CBT50 as front wide right now and to test how they sounded, I ran then with stereo music to test and even in their very wide location sounded very good with music (lacked low end as would be expected). I then tested them with 4 subs with stereo music and they sounded really quite good.

 

[Chromatischism]

Go for omnidirectional if you want maximum dispersion! I'm hoping to test some Duevel Planets next week, but note they are towers:

Duevel Planets - omnidirectional highend audio home speaker

the only one high-end audio horn-speakers with a perfect omnidirectional character, like the acoustical ideal of a point source, with a new quality of natural music reproduction.

www.duevel.com

The current immersive audio formats call for direct radiators, though.

 

[sarumbear]

Yeah. I don't think those measurements are representative of actual use.

How so? Can you elaborate what was wrong with the measurements?

 

[Chromatischism]

How so? Can you elaborate what was wrong with the measurements?

They weren't done on-wall, were they? I didn't see that they were. I think on-wall use smooths out the response. I'm not saying they become completely flat studio monitors, but they even out some.

 

[sarumbear]

They weren't done on-wall, were they? I didn't see that they were. I think on-wall use smooths out the response. I'm not saying they become completely flat studio monitors, but they even out some.

Mounting on wall will simply increase the bass due to disappearance of the baffle effect as the speaker works in 2pi space. What you think does not follow laws of physics.

What about the extremely narrow beam angle, will that change by mounting on a wall? This is what the company says.

Patented Hemispherical Soundfield Technology (HST)​

Infinity’s engineers have developed and patented Hemispherical Soundfield Technology (HST) to eliminate the detrimental acoustical reflections typically associated with wall-mounting loudspeakers. With the HST design, a rear-facing woofer is scientifically positioned at a given distance from the wall while companion dual high- frequency drivers with advanced waveguides are each placed on either side of the angled front panels. This combination of driver positioning and waveguide pattern control provides remarkably balanced coverage across a 180-degree hemispherical listening area without the typical “hot and cold” frequency response inefficiencies found with mounting traditional loudspeakers on the wall. The end result is a loudspeaker with extremely flexible on-wall placement capability while maintaining consistent performance over a wide area even when listening from far off to one side.

https://www.infinityspeakers.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw307c64f0/pdfs/INF_Reference_RS152%20English.pdf

And this is what the coverage is, and not even symmetrical.

This speaker is not suitable for anything but certainly not for surround.

 

[ta240]

Ascend audio Sierra lx?

 

[Chromatischism]

Mounting on wall will simply increase the bass due to disappearance of the baffle effect as the speaker works in 2pi space. What you think does not follow laws of physics.

You're forgetting that the bass driver is facing the wall. I don't think this speaker acts the same when mounted as intended.

 

[sarumbear]

Ascend audio Sierra lx?

Quite a decent bookshelf from a decent manufacturer who are not afraid to back up their engineering with measurements. They even offer to give the measurements of the speakers that you purchased.

 

[Chromatischism]

Quite a decent bookshelf.

Thanks, that is the first time I have seen those. They must have been posted at Ascend, where I don't have an account. I'm not a fan of the narrowing, then widening, then narrowing, but it's otherwise good. I feel that the widening from 2-4 kHz might be mistaken by some as an "airy" tweeter and misattribute it to some inherent property of the ribbon material, but that's for another thread. I see Dave has attempted to compensate by raising, then lowering, the on-axis sound, which is well-done.

 

[sarumbear]

Thanks, that is the first time I have seen those. They must have been posted at Ascend, where I don't have an account.

They are from the manufacturers website.

I'm not a fan of the narrowing, then widening, then narrowing, but it's otherwise good.

That happens outside the 120 degree dispersion. It’s rare that you need a wider angle at a HT setup.

 

[Chromatischism]

Oh my god, they finally reimagined their website! It was long overdue. Normally Dave only posted about them in the forums so it's nice to see this.

Also, my mistake on the ribbon – these are the non-ribbon model. The response tricked me...hmm.

 

[Chromatischism]

Makes me want to do a speaker shootout. Sierra LX vs Paradigm Founder 40B vs Arendal 1723 Monitor S vs Buchardt S400 MKII. I don't plan on this ever happening as it would require maxing out my credit card, but I can dream!