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#2850096 - 04/17/17 03:37 PM QSC Introduces K.2 Series Loudspeakers
slowtraveler Offline
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#2850106 - 04/17/17 04:05 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: slowtraveler]
MotiDave Offline
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I saw this. look forward to KC reviews ... did not see ship dates in the info I saw.
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#2850113 - 04/17/17 04:25 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: MotiDave]
Reezekeys Offline
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Interesting. The weight looks the same (at least for the 8). The amp modules went from 500 + 500 watts which was already ridiculous, to 1800 and 225. Will this make a difference in the real world? I know the point is to keep the amp way below clipping, but it seems to me that a single 8" speaker would melt before you'd clip an amp putting 500 watts into it. Probably a 10" and 12" too.

The improvements seem to be the scenes & presets, which they cribbed from EV, correct? I know someone else had a little LCD on the back. The "music player" input went from RCA jacks to a 3.5mm stereo jack and is now it's own channel (instead of sharing the B/line input). And, the 8" model can now work as a stage monitor. All worthwhile improvements feature-wise but I wonder how different it actually sounds from the 1st gen. I'm not expecting a night & day experience there.

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#2850116 - 04/17/17 04:34 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: MotiDave]
mate stubb Offline
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Correct the beaminess and high volume harshness, and I'd love them. Would like to see frequency response charts!

I see they are not wasting power on the horns like previous models. 1800W bass, 225W horn.
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#2850163 - 04/17/17 10:49 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: mate stubb]
Jazzmammal Offline
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C'mon, where are they getting 1800 watts to the bass? Really?

They must be measuring some ridiculous peak that lasts a nano second to get that number if it exists at all.

Bob

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#2850165 - 04/17/17 11:10 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: Jazzmammal]
mate stubb Offline
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The figures are stated to be peak, so continuous or rms power is maybe half that.

600W to the bass, 110W to the horn. The actual figure that matters is 127 dB max output.
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#2850187 - 04/18/17 06:03 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: mate stubb]
Delaware Dave Offline
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Loc: Take a guess ....
IIRC, the K8,10 & 12 were 127dB,129 and 131 respectively. The K2 series is 128,130 and 132. So 1dB increase across the board. My ELX112P is 132dB.
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#2850190 - 04/18/17 06:11 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: Delaware Dave]
BigJPatton Offline
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More power! we have plenty already, so this looks great for the PA people, but ho-hum for a keyboard monitor.

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#2850202 - 04/18/17 07:50 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: BigJPatton]
Outkaster Offline
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Can't wait
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#2850204 - 04/18/17 08:06 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: Outkaster]
Theo Verelst Offline
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So, take a nice saw wave at 1 kHz, put a watt meter between the K and the mains, or measure the (AC) voltage and current on the speakers, stand back, I don't know a few yards, or as far as the front row is and check it out how much power (or dBs) you really want. And at what distortion (harmonic, transient intermodulation, phase, digital, etc etc)...

T.

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#2850362 - 04/19/17 03:26 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: Theo Verelst]
Donsta Offline
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#2850374 - 04/19/17 05:28 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: Donsta]
Donsta Offline
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Also this. "Looks like According to QSC, the K.2 Series will be available in select markets in mid-May 2017. Estimated US street prices are $649.99 for the K8.2, $699.99 for the K10.2, and $799.99 for the K12.2."

Late summer for the rest of us.

http://www.prosoundnetwork.com/new-products/qsc-announces-k2-series-loudspeakers/47340
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#2850429 - 04/19/17 09:44 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: Jazzmammal]
The Real MC Offline
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Originally Posted By: Jazzmammal
C'mon, where are they getting 1800 watts to the bass? Really?


Yes really. Class D amplifiers have pretty much replaced older designs - they run very cool, they're much lighter, and can put out very high power per square inch.

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#2850578 - 04/20/17 06:59 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: The Real MC]
Ensenada Guide Offline
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I know qsc. makes your keyboards sound really good
what so special about this speakers??
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#2850584 - 04/20/17 07:20 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: Ensenada Guide]
AnotherScott Offline
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Originally Posted By: Ensenada Guide
I know qsc. makes your keyboards sound really good
what so special about this speakers??

Nothing. Not that there's anything wrong with them either. But there are lots of good choices in the same size/price range. I think QSC got the reputation by getting there first. Maybe someone else can confirm, but I think they may have been the first major brand to use Class D amplifiers in this kind of gear, which allowed for better performance in smaller/lighter speakers. But now you can get the same benefits from EV, Yamaha, JBL, RCF, etc. And many people prefer some of those to QSC.
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#2850653 - 04/20/17 12:07 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: AnotherScott]
Mark Schmieder Offline
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Here's a good article about Class D amplification from Sound-On-Sound:

http://www.soundonsound.com/techniques/what-class-d-amplification

We use Class D in most of our touring speakers, and I think it has now worked its way down to almost everything we make at almost any size (except maybe ones that have external power supplies).

People get too hung up on technology. It's how you use it that counts. Even solid state can sound as good as tubes, but at greater cost. Same with amplifier classes. Class D gets a bad rap because a lot of companies execute it poorly.


Edited by Mark Schmieder (04/20/17 12:07 PM)
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#2850664 - 04/20/17 12:54 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: Mark Schmieder]
MotiDave Offline
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my knock on K10, which I first caveat that it is a fine speaker, was it doesn't have as flat of a freq response as some others (jmo). it is, again to me, a bit shrill in the mid-upper band and others fell "fuller", "warmer", pick the adjective you prefer.

Maybe K10.2 improves performance? that's the report I'm waiting to hear from early adopters. I like the form factor and look, not sure I need all the settings it affords but maybe it allows one to dial that fuller thicker sound I was seeking.
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#2850687 - 04/20/17 02:35 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: MotiDave]
cphollis Offline
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The original K series have been around for a L-O-N-G time and have been very successful. Meanwhile, everyone else caught up and started to surpass them, especially in wattage.

Yes, I know that watt ratings are relatively irrelevant metrics, but that's how marketing works, sort of like automotive horsepower. That being said, when it got loud, I could drive the original 1000w K series to clip and distort on sharp transients. Not a big issue, but more watts should help.

I went and checked out the frequency response curves. The K8.2 is relatively flat (and thus interesting), the K10.2 and K12.2 less so, hence less interesting.

For me, the K8s have been the best of the bunch: best sounding, most convenient, etc. But it didn't have the floor monitor wedge, which has been fixed with the K8.2, so that's nice.

Over the years, I've been happy with the K series. I would expect people to be happy with K.2 series as well.
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#2850704 - 04/20/17 05:07 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: cphollis]
cphollis Offline
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Sorry, have to add, the idea of a 2000w K8.2 is just too tantalizing to ignore. 1000w in a tight 8 inch with DSP was the bomb. 2000w? More bomb.

Gonna have to buy me a pair just because.
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#2850708 - 04/20/17 05:59 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: cphollis]
mate stubb Offline
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Originally Posted By: cphollis

I went and checked out the frequency response curves. The K8.2 is relatively flat (and thus interesting), the K10.2 and K12.2 less so, hence less interesting.


I went looking for these graphs a couple of times. Pray tell where did you find them?
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#2850713 - 04/20/17 06:21 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: mate stubb]
MotiDave Offline
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Originally Posted By: mate stubb
Originally Posted By: cphollis

I went and checked out the frequency response curves. The K8.2 is relatively flat (and thus interesting), the K10.2 and K12.2 less so, hence less interesting.


I went looking for these graphs a couple of times. Pray tell where did you find them?
i didn't find them either though that should not surprise many. I'm wondering if the DSP/EQ/shape options will allow one to get a flatter response that would suit rich lush keys. K10.2 would be in my sweet spot if it can ride alone.
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#2850718 - 04/20/17 06:48 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: MotiDave]
sleepngbear Offline
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I'm a little floored that they changed the power split between woofer and tweeter as dramatically as they did from the original K series. Conventional wisdom says you need more juice pushing the lower frequencies, so I always questioned why the 500-500 distribution. So I'm glad about this change, and very curious to hear a A-B comparison.
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#2850719 - 04/20/17 07:17 PM Re: QSC Introduces K.2 Series Loudspeakers [Re: sleepngbear]
AnotherScott Offline
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Originally Posted By: sleepngbear
Conventional wisdom says you need more juice pushing the lower frequencies, so I always questioned why the 500-500 distribution.
I think that Class D amplifiers had generally been designed as single units that contained identical stereo pairs. So essentially, the original K contained a single 2-channel 500 w/ch amp... which meant that most of the capacity of one of the amps went unused. So I think more than looking impressive on paper, it was more a matter that, if you wanted 500 for the woofer, dual-500 was probably just the most cost effective way to design it at the time, even though you were largely "wasting" the capacity of the 2nd 500 watt amp (and same for everyone else who did the same thing). I guess that's changed.
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#2850778 - 04/21/17 05:32 AM Re: QSC Introduces K.2 Series Loudspeakers [Re: mate stubb]
cphollis Offline
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Originally Posted By: mate stubb
Originally Posted By: cphollis

I went and checked out the frequency response curves. The K8.2 is relatively flat (and thus interesting), the K10.2 and K12.2 less so, hence less interesting.


I went looking for these graphs a couple of times. Pray tell where did you find them?


Right here

https://www.qsc.com/resource-files/productresources/spk/k.2/q_spk_k2_specs_en.pdf
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