Hi Colin, I just hooked up the k-10's and am very happy with the 
low noise coming from them with no signal playing.  If I turn up 
the volume controls on the back all the way, I can hear a slight 
hiss, but I would never leave them at max volume for obvious 
reasons.  I have played a variety of music through them and am 
really happy with the results here at my place.  The speakers 
have x l r connectors, quarter inch, and RCA phono jacks which 
are the one's I am using for line in.  I can't get much 
separation here the way things are, but it will only be better 
when I finally get things situated.  73, Jim

----- Original Message -----
From: Colin McDonald <[log in to unmask]
To: [log in to unmask]
Date sent: Fri, 5 Oct 2012 11:25:29 -0600
Subject: Re: OT, Qsc k-10 speakers?

I haven't used these particular QSC speakers.
I have used qsc power amps before and they always sounded pretty 
good for
live environments.
These k10's or k12's sound like they are good for small to medium 
PA
applications.
One thing you have to be aware of though is that signal to noise 
ratio in
powered PA speakers will be significant compared with your 
average home
stereo equipment.
A 1KW amplifier is rather liberal of them since the only way you 
can get 1kw
of program power out of them is with a pile of drive and a huge 
amount of
distortion...
They'll probably sing along at a few hundred watts without too 
much trouble
though.
However, the noise will be pretty obvious in a typical home 
listening
environment.
In order to get output like that, the amplifiers have to be class 
D digital
amps, and though they sound very clean up to a certain point, 
that clean
audio comes with a price on it.
The noise is usually a hiss that can be heard even when the 
speaker is
sitting idol.
You don't hear that in live venues due to other ambient noise.
So, if your intension is to use them for home listening, you may 
be
disappointed.
However, if your intension is to use them for live work, then 
they'll
probably fit the bill nicely.  They sound like they are fairly 
small and
pack a punch.
I've used a number of different powered cabinets such as the 
yorkville
200P's, 550P's and 750P's.  These range from a 15 inch driver and 
1 inch
tweeter on the 200P's with a 200W amplifier, to the 750p's which 
have a 15
inch driver and 2 inch tweeter and 750W of output.
I've also used samson powered speakers which are garbage in my 
opinion.
Also, I've used some JBL's in the past which sound pretty nice, 
though not
quite as nice as the yorkville gear.
I wasn't actually aware that QSC had gotten into the powered 
cabinet market.
They may be one of the first to address the signal to noise ratio 
in their
class D amplifiers, and if so, all this talk of noise may be a 
moot subject.
I'll do some more reading on them and see what I can come up 
with.
What is the price point like on these?  That, like with most 
music related
gear, is usually a fairly good indicator of quality and 
usability.
A typical decent 1kw powered cab should cost somewhere in the 
range of $1000
to $2000.  That large range being due to features and actual 
program power
etc.
The program power rating is what the speaker will actually 
produce given
typical line level drive.  More like an RMS rating.


73
Colin, V A6BKX
----- Original Message -----
From: "Jim Gammon" <[log in to unmask]
To: <[log in to unmask]
Sent: Friday, October 05, 2012 12:35 AM
Subject: OT, Qsc k-10 speakers?


 Hey Colin, off topic, but have you ever heard or heard of QSC
 k-10 or k-12 speakers? They are PA speakers but can also be used
 to play music.  They are I guess large book shelf speakers, but
 have handles on one side and the top.  They have a hold in the
 bottem that can accommodate those tripod stands that go from
 about 4 feet to probably 7 or 8 feet high.  Each speaker has a
 1000 watt power amp in it and has several types of input on the
 back as well as some low and high frequency controls and volume.
 Just wondering if you know about them? 73, Jim