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KEF KC92 and Kube MIE subwoofers

Wow if the KC92 has the exact same performance as the KF92, doesnt this mean that this is sort of failure for a new product?
 
Opal said:
Wow if the KC92 has the exact same performance as the KF92, doesnt this mean that this is sort of failure for a new product?
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It depends on how many new units are sold. My guess is "many".
 
As i mentioned the only review on youtube figured out that it can pusch Single frequenzy more than just a sweap. My kube 12b don t do it, hopefully Ben can check it on his kc92 and kf92. Sadly i didnt test it last ywar on my kf92 before i sell it
 
Vacceo said:
At any rate, even if the new subwoofer feels quite underwhelming, I wonder how much further the original design could be pushed.
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I dont think that much more, the didn't change that much that subwoofer and the Reference 8b is a very rare subwoofer to see, here in this forum i don't remember anyone with that sub, also in fb groups...
 
Leon7791 said:
As i mentioned the only review on youtube figured out that it can pusch Single frequenzy more than just a sweap. My kube 12b don t do it, hopefully Ben can check it on his kc92 and kf92. Sadly i didnt test it last ywar on my kf92 before i sell it
Click to expand...
Yep, Joe was right in his video review! When pushing single tones for short durations, I was able to hit my calibrated 85 dB target. This is a plot of a variety of 1/3rd octave tones from 20 to 80 Hz:

ThirdOctave.png


Originally I ran longer sweeps (1M sequence). So the KC92 can have decent output at 20 Hz, just not sustained at a constant SPL for very long. Now I really want to check out Edge of Tomorrow to see how it performs!
 
ban25 said:
Yep, Joe was right in his video review! When pushing single tones for short durations, I was able to hit my calibrated 85 dB target. This is a plot of a variety of 1/3rd octave tones from 20 to 80 Hz:

View attachment 371102

Originally I ran longer sweeps (1M sequence). So the KC92 can have decent output at 20 Hz, just not sustained at a constant SPL for very long. Now I really want to check out Edge of Tomorrow to see how it performs!
Click to expand...
Oh i see, was masurements method error, yeah music is not constant anyway

btw, subj do you hear an improvement over the kf92?
 
ban25 said:
Yep, Joe was right in his video review! When pushing single tones for short durations, I was able to hit my calibrated 85 dB target. This is a plot of a variety of 1/3rd octave tones from 20 to 80 Hz:

View attachment 371102

Originally I ran longer sweeps (1M sequence). So the KC92 can have decent output at 20 Hz, just not sustained at a constant SPL for very long. Now I really want to check out Edge of Tomorrow to see how it performs!
Click to expand...
Interesting and how about the kf92?
 
Vacceo said:
Some people around here had considered that KEF should go for a bigger KC driver setup, something akin to Arendal with dual 12's. It would definetly be interesting.

At any rate, even if the new subwoofer feels quite underwhelming, I wonder how much further the original design could be pushed.

@ban25 , thanks for he information! Now that you're using two subs, how was the improvement on the overall sound? More even response? Also, for reference, what is the area of your listening space? And as purely personal curiosity, how are infrasonics in the whole pack? I can guess they can be measured but not really punching (thinking of Edge of Tomorrow intro).
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I'm very pleased with the results from DLBC Multi-Sub. As you can see below, it was able to fill a null at 30 Hz and 50 Hz. It's more consistent overall as I walk around the room and much easier to listen to. The listening space is 30 ft x 16 ft, open on one side to the kitchen, which is the same size again. The other side is a glass door opening out to a terrace. Ceilings are 10 ft and 13 ft. Overall, it's a pretty challenging space, but Dirac is doing a good job.

DLBCMultiSub.png
 
ban25 said:
They both sound exactly the same to me. I even tried swapping their positions and I can't hear any difference.
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I would expect the p flex to give more linear movement or somethin' but apparently because the design is the same they didn't use that for any useful, distortion is the same too?
 
BrokenEnglishGuy said:
I would expect the p flex to give more linear movement or somethin' but apparently because the design is the same they didn't use that for any useful, distortion is the same too?
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Distortion was ever so slightly lower on the KC92, but easily within the margin of error.
 
BrokenEnglishGuy said:
I dont think that much more, the didn't change that much that subwoofer and the Reference 8b is a very rare subwoofer to see, here in this forum i don't remember anyone with that sub, also in fb groups...
Click to expand...
I'd say so too; there comes a moment that no amount of DSP will give you beyond material constrains.

ban25 said:
I'm very pleased with the results from DLBC Multi-Sub. As you can see below, it was able to fill a null at 30 Hz and 50 Hz. It's more consistent overall as I walk around the room and much easier to listen to. The listening space is 30 ft x 16 ft, open on one side to the kitchen, which is the same size again. The other side is a glass door opening out to a terrace. Ceilings are 10 ft and 13 ft. Overall, it's a pretty challenging space, but Dirac is doing a good job.

View attachment 371104
Click to expand...
Thanks for answering!

I can see a very good response around 20 Hz, and that means there should be quite a nice amount of push left for infrasonics.

Really good looking response.
 
Vacceo said:
I'd say so too; there comes a moment that no amount of DSP will give you beyond material constrains.
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The problem with kef subs is they did a very small subwoofer and that's. Why not a normal size subwoofer with unusual 12'' woofers? 11''? idk.
 
BrokenEnglishGuy said:
The problem with kef subs is they did a very small subwoofer and that's. Why not a normal size subwoofer with unusual 12'' woofers? 11''? idk.
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Most of KEF's speakers, especially their Wireless LS60, LS50 Wireless and LSX have a really room friendly and 'lifestyle' design.
So if they're moving more towards this audiophile lifestyle and design focussed market it only makes sense to build small unintrusive subwoofers.

It would be nice if they had a more hometheatre focussed product range with 12", 15" or even 18" subs like Perlisten but that's apparently not their target audience.
I'm sure that most KEF customers are fine with the output capabilities of those KEF subs for the typical room size and listening levels
 
Oh yes i use two KC92 with my LS60 they keep up , with music content :) I play as loud as I ever want to.

In a HT setting I would go for something else :D
 
juliangst said:
Most of KEF's speakers, especially their Wireless LS60, LS50 Wireless and LSX have a really room friendly and 'lifestyle' design.
So if they're moving more towards this audiophile lifestyle and design focussed market it only makes sense to build small unintrusive subwoofers.

It would be nice if they had a more hometheatre focussed product range with 12", 15" or even 18" subs like Perlisten but that's apparently not their target audience.
I'm sure that most KEF customers are fine with the output capabilities of those KEF subs for the typical room size and listening levels
Click to expand...
KEF has a quite wide range of speakers including THX-rated ones. It wouldn't be out of place to have a "KC122"

Mnyb said:
Oh yes i use two KC92 with my LS60 they keep up , with music content :) I play as loud as I ever want to.

In a HT setting I would go for something else :D
Click to expand...
Probably with the right settings, those two subwoofers can be quite adequate for a mid and small HT room.
 
Vacceo said:
KEF has a quite wide range of speakers including THX-rated ones. It wouldn't be out of place to have a "KC122"


Probably with the right settings, those two subwoofers can be quite adequate for a mid and small HT room.
Click to expand...
I agree. The Reference 8b is quite outdated. They need something with 10-12" drivers that has balanced inputs.
 
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