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Multi-Way Conventional loudspeakers with crossovers

KEF LS50
KEF LS50
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Old 4th February 2019, 08:32 AM   #171
Toaster is offline Toaster  United Kingdom
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...but the Q100 and R100 drivers are not be same. The R100 driver does appear to be the same as that in the LS50.
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Old 4th February 2019, 08:36 AM   #172
Zvu is offline Zvu  Serbia
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Q100, R100 and LS50 are more alike than not. There are differences of course but they share a common lineage - as Jack Oclee-Brown said it.

I imagine that differences are more in distortion performance than frequency response domain. LS50 has that treatment of suspension to battle resonance, Q100 doesn't have that etc.

Last edited by Zvu; 4th February 2019 at 08:39 AM.
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Old 4th February 2019, 08:42 AM   #173
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I very nearly bought a pair of R300s to play with, but I have far too many projects already. Although entirely OT, I will mention in passing that I now have a pair of second-hand ATC SCM40As, which seem to have retired me from big speaker projects- apart from a pair of SEAS L26ROY subs to go with them! Really excellent speakers with built-in amps. The modern KEF coax speakers I've heard do sound very good at their various price points though.
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Old 4th February 2019, 08:46 AM   #174
Toaster is offline Toaster  United Kingdom
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Second-hand Q100s or second-hand or end-of-line R100s look like great value either used as-is, or as the basis for a project.
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Old 17th March 2019, 12:00 AM   #175
Zvu is offline Zvu  Serbia
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LS50 woofer and tweeter response on axis, no crossover in factory cabinets, 1m distance. Gated of course:

IMG-c19c67e98e1390d1de94af7c1e2e88eb-V.jpg

IMG-1e559fe86a529f4c0d62b63e87356386-V.jpg
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Old 6th April 2019, 04:37 PM   #176
Tournesol is offline Tournesol  Belgium
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After little time listening to various sources with my brand new Kef LS50 wireless, and after the first surprises to hear what came out of such small speakers, I'm VERY disappointed.

No "substance" anywhere, it lacks a basement in the low medium, the treble is aggressive, there is a bump in high treble, it sounds distorted, I always want to lower the level, yet far from to be high. But it does not help.
I do not understand the so much praise comments that can be read everywhere.

The voices are the worse. While, with my big system (JBL driver +spherical massive wood horn), the singer stay just in front of you, with an animal presence on his feet,
well in front of the speakers, here, the voices seems to come from somewhere in the far away space. While, on my big system, the cymbals are huge and you can feel the violent hit of a strong stick on an heavy piece of copper, here, they sound microscopic and thin and like hit with a little stick made of cristal.

It may be due to the class D amp, if they are very analytical, they often give the feeling that it lacks "material", the amp class AB in the treble that sounds aggressive (I'm used to current feedback amps)?
Finally, it is expensive for a bar of sound that I just feel good enough to listen to the TV.

No miracle, at the end ! Size matters.
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Last edited by Tournesol; 6th April 2019 at 04:44 PM.
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Old 6th April 2019, 05:22 PM   #177
Juhazi is offline Juhazi  Finland
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"While, with my big system (JBL driver +spherical massive wood horn)"

Comparing sound of that to LS50 is not fair, horn sound is very different from "normal" speakers. Lack of low base I share, but that applies to every small 2-way speaker.

Have you measured room response of your big speakers and LS50?
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Old 6th April 2019, 05:56 PM   #178
mitchba is offline mitchba  Canada
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KEF LS50 (David) Versus JBL 4722 Cinema (Goliath) Speaker Comparison with Binaural Recordings - Reviews - Audiophile Style

The biggest difference I noticed is the directivity differences between the two speakers, which one can hear on the binaural recordings.
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Old 6th April 2019, 06:19 PM   #179
Tournesol is offline Tournesol  Belgium
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Quote:
Originally Posted by Juhazi View Post
"While, with my big system (JBL driver +spherical massive wood horn)"

Comparing sound of that to LS50 is not fair, horn sound is very different from "normal" speakers. Lack of low base I share, but that applies to every small 2-way speaker.

Have you measured room response of your big speakers and LS50?
No, I have spend too much time to measure my big system when I was designing-it: tired, now.

Those Kef are is a self powered closed system: I plugged them, and... did not enjoy after the first surprise. My listening room is... as it is.
Worse: I prefer listening to my 150$ PC speakers. Not detailed at all, but, at least, balanced: full range (no tweeter) + little sub.

I will try to build an amp in order to can use my big sub with those: will see, but don't have a lot of hope. Fundamental of voices are not so low in frequencyand I will not gain a lot of "presence".
Kef made a mistake, IMHO, in offering a unbalanced system: when you lack of bass, you have to cut the trebles. Those speakers have lot of qualities, but they certainly do not desert the rave comments that I have read about them: they just sound ... unrealistic and unpleasant.
My purpose here is to moderate those comments by a more realistic report.
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Old 15th April 2019, 10:47 PM   #180
mdelrossi is offline mdelrossi  United States
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Tournesol,
How long have you played the LS50w's?

They really need a long break-in, correct placement, and trial and error with the app settings, go into the Expert mode.

And yes a Sub is extremely helpful.

Good liuck.
mdr
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