The QSC K.2 series on-axis frequency response graphs are here:
https://www.qsc.com/resource-files/prod ... _specs.pdf
As you can see a K10.2 on its default settings hangs in there to 50 Hz or so, and that's before you start EQing things. If that last octave on an 88 keyboard is that important to you, consider a small sub.
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cphollis - Posts: 1590
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Re: Settings on QSC 10.2 with Stage 3
cphollis wrote:The QSC K.2 series on-axis frequency response graphs are here:
https://www.qsc.com/resource-files/prod ... _specs.pdf
As you can see a K10.2 on its default settings hangs in there to 50 Hz or so, and that's before you start EQing things. If that last octave on an 88 keyboard is that important to you, consider a small sub.
Actually its -6db at 56 Hz, and -10db at 50 Hz.
You have to push the box to get stuff below 56hz. You can do it, but you eat up amplifier headroom in the process.
There is a +6db bump centered around 90Hz, the box crosses flat at 70Hz and then dives.
So it falls off pretty fast starting around C2 on your keyboard. And yes, if its important get a sub.
Last edited by cgrafx on 27 Mar 2020, 22:40, edited 6 times in total.
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Re: Settings on QSC 10.2 with Stage 3
The DI box sounds like a reasonably straight forward solution though I am not sure I understand how they work. Do they convert the sound from mono to stereo? Does an xlr connection do this- or why does the connection change from a 1/4 inch to xlr?
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Re: Settings on QSC 10.2 with Stage 3
I have tried a ton of combinations and ended up with a single QSC K10 monitor. I prefer to run stereo K10's, but it was too much to move around and the audience didn't hear the stereo. I am a huge fan of the Radial transformer direct boxes with summing. I am using a Radial JDI. Stereo out of the Nord into the JDI, merge into a single signal and into the board. This DI seems to keep the space in the acoustic pianos that I was unable to get with other DI boxes.
1. I don't like monitors over 10" on stage. Tried the EV ZLX15 and found I can't get far enough away from it.
2. The K10 has plenty of bottom end. On a wooden stage, I find the bass to need to be rolled back, especially on the digital pianos.
3. The Radial JDI I am using is the stereo version. So, when there is an opportunity to run the mains in stereo (smaller venues) I can get a clean stereo sound out front. The monitor signal is a sum of the stereo signals and sounds clean in the K10.
4. There will be something new next year to take up my extra cash.
1. I don't like monitors over 10" on stage. Tried the EV ZLX15 and found I can't get far enough away from it.
2. The K10 has plenty of bottom end. On a wooden stage, I find the bass to need to be rolled back, especially on the digital pianos.
3. The Radial JDI I am using is the stereo version. So, when there is an opportunity to run the mains in stereo (smaller venues) I can get a clean stereo sound out front. The monitor signal is a sum of the stereo signals and sounds clean in the K10.
4. There will be something new next year to take up my extra cash.
Last edited by twofarmers on 28 Mar 2020, 16:33, edited 1 time in total.
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Re: Settings on QSC 10.2 with Stage 3
twofarmers wrote:I have tried a ton of combinations and ended up with a single QSC K10 monitor. I prefer to run stereo K10's, but it was too much to move around and the audience didn't hear the stereo. I am a huge fan of the Radial transformer direct boxes with summing. I am using a Radial JDI. Stereo out of the Nord into the JDI, merge into a single signal and into the board. This DI seems to keep the space in the acoustic pianos that I was unable to get with other DI boxes.
1. I don't like monitors over 10" on stage. Tried the EV ZLX15 and found I can't get far enough away from it.
2. The K10 has plenty of bottom end. On a wooden stage, I find the bass to need to be rolled back, especially on the digital pianos.
3. The Radial JDI I am using is the stereo version. So, when there is an opportunity to run the mains in stereo (smaller venues) I can get a clean stereo sound out front. The monitor signal is a sum of the stereo signals and sounds clean in the K10.
4. There will be something new next year to take up my extra cash.
...it is starting to make sense...can I get away with going directly to the K 10.2, rather than through a board? So there is a stereo JDI and a mono? I take it these are passive DI boxes? Does it end up sounding somewhat close to what it does with headphones in stereo?
This is all very new, and I genuinely appreciate your insight.
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Re: Settings on QSC 10.2 with Stage 3
Yes, you can get away with going directly to the K10.2, simply plug your TS (1/4") cables into the back and away you go. A small mixer will help with gain staging, but it's certainly optional. You don't need a DI box, but may want one.
The DI box helps with splitting the signal(s) so that you can feed both your personal monitors/amplification as well as FOH PA. This way, you can turn up the volume on your personal monitors/amplification without affecting the FOH PA level. Radial Engineering makes amazingly great products, BTW. DI boxes don't sum stereo into mono, generally speaking. In the example above, the K10.2 is doing the summing with its A and B inputs.
The reason you'd get a stereo DI is that you prefer to play in stereo. The Jensen transformers you read about do make a difference to my ears -- smoothing out some of the harsher transients and warming things up a small bit.
While we are on this topic, the Radial Key Largo is an amazingly useful bit of kit if you want to mix multiple keyboards.
The DI box helps with splitting the signal(s) so that you can feed both your personal monitors/amplification as well as FOH PA. This way, you can turn up the volume on your personal monitors/amplification without affecting the FOH PA level. Radial Engineering makes amazingly great products, BTW. DI boxes don't sum stereo into mono, generally speaking. In the example above, the K10.2 is doing the summing with its A and B inputs.
The reason you'd get a stereo DI is that you prefer to play in stereo. The Jensen transformers you read about do make a difference to my ears -- smoothing out some of the harsher transients and warming things up a small bit.
While we are on this topic, the Radial Key Largo is an amazingly useful bit of kit if you want to mix multiple keyboards.
I think I have gear issues ....
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cphollis - Posts: 1590
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Re: Settings on QSC 10.2 with Stage 3
Just to clarify, I meant from the DI box to the speaker without going through a PA. I currently have the keyboard connected with the 1/4" and that is the issue. The piano sounds are lacking when compared to the sound I hear through headphones. I am trying to find a relatively inexpensive way to duplicate that sound.
This is just for playing at home for now....
Would a DI box help with that...would it help a little bit, or a lot?
This is just for playing at home for now....
Would a DI box help with that...would it help a little bit, or a lot?
Last edited by Bizscott on 28 Mar 2020, 18:20, edited 1 time in total.
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Re: Settings on QSC 10.2 with Stage 3
Bizscott wrote:Just to clarify, I meant from the DI box to the speaker without going through a PA. I currently have the keyboard connected with the 1/4" and that is the issue. The piano sounds are lacking when compared to the sound I hear through headphones. I am trying to find a relatively inexpensive way to duplicate that sound.
This is just for playing at home for now....
Would a DI box help with that...would it help a little bit, or a lot?
A DI box is not magic, its function is to change the impedance of a signal from single-ended (generally hi-z) to balanced low-z. There will be some colorization that occurs through the DI depending on the design and components used in the box.
If your just playing at home, what is wrong with using headphones? They will give you the most detailed sound for the least amount of money.
And NO you cannot replicate what you hear in headphones with a single speaker as there is no stereo field (That requires audio to be sourced from two different locations). Headphones will provide the widest and most detailed stereo field under all circumstances. If you want to get in the general ballpark of headphones, you will need two speakers ideally at ear level on opposite sides of your head. As the speakers move away from your ears and interact with more of the surroundings the stereo field and detail will get more smeared, less spacial and less detailed.
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- cgrafx
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Re: Settings on QSC 10.2 with Stage 3
Basically it would be nice to find a way to.play with/for my kids and bring out a decent, reasonable stereo sound without having to buy another k 10.2. I'm trying to get closer to the sound one hears in the demos....I recognize that these are done professionally but closer would be nice.
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Re: Settings on QSC 10.2 with Stage 3
Bizscott wrote:Just to clarify, I meant from the DI box to the speaker without going through a PA. I currently have the keyboard connected with the 1/4" and that is the issue. The piano sounds are lacking when compared to the sound I hear through headphones. I am trying to find a relatively inexpensive way to duplicate that sound.
This is just for playing at home for now....
Would a DI box help with that...would it help a little bit, or a lot?
If you are playing from home, you could plug in direct from the instrument to speaker like we've mentioned. You certainly don't need any kind of volume for home playing.
In place of a DI box, I would recommend a small mixer like the Yamaha MG06 or Mackie 402VLZ4. You can plug the L and R outputs from your Nord into separate channels and then sum them to mono to the speaker. You also have some tone control, gain staging and headphone output if you want to listen privately in stereo. You can also connect other sound sources such as additional instruments, computer or phone/tablet to play along with songs.
As you grow and add another speaker to your arsenal, the mixer is ready for you. Inexpensive and a good investment.
Mike from Central NJ, USA
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Tools: Ten fingers, two feet, middle-age brain, questionable judgement and taste
Current Nords: Piano 5 73, Electro 6D 73
Ownership History: Electro 2, Electro 3-73 SW, Electro 3HP, Electro 4D, Stage 2EX 76HP
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Rusty Mike - Posts: 915
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