Hi Colin, thanks for the info on the powered systems. I haven't taken on
out of the box though after reading your email, I am going to hook them up.
When I listened to one at the store the other night the surrounding noise
level was low and I don't recall hearing much if any hiss from the amp. You
have my curiosity peaked now. I had planned to just leave them boxed until
moving them to the new place. Far as price, everyone seems to be seeling
them at around $749 but I got them from the Guitar Center for $693 each with
my wife and I each using an online coupon to get 15 percent off the original
price. Hopefully they have addressed your noise concerns. I plan to run
them off the preamp out's of my old Sony amp. 73, Jim
-----Original Message-----
From: Colin McDonald
Sent: Friday, October 05, 2012 10:25 AM
To: [log in to unmask]
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
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