Kone Driver

[Adimar Poynter]

Butthis doesn't make sense to me, it's a FRFR speaker. Of course you don't get all of the other features if you plug in another amp, but do you really think that this will only work with a kemper and nothing else?

I own a KPA toaster format, with a Camplifier retrofitted power amp.

Would the Kone work with that? Or only with native powered KPA?

I'm thinking about switching the speaker only in the cabinet I currently use...

The Kemper Kone driver appears from a distance to be a fairly standard Celestion with a whizzer cone. The dust cap is a larger one glued into the whizzer rather than right at the end of the coil like other makers do it (i.e. Eminence with the 12LTA). The industry's whizzer "full range" 12" speakers are somewhat similar in response, with a high end dropoff from 9-12kHz and some interesting resonances in the upper midrange\low treble. And the dispersion characteristics of whizzer speakers IME can be extremely beamy in the trebles.

The driver in one NAMM video appears to have an interesting surround, more like a woofer. If memory serves, the surround is much like the one on the F12-X200; I wonder if the Kemper Kone is basically a F12-X200, but with a whizzer cone instead of a tweeter? But one thing is for certain; the Kemper Kone is NOT a stock green F12-X200 as some have speculated (as the Kone does not have an integrated tweeter and crossover).

I would guess also that the Kemper Kone driver would be quite usable as a limited treble semi-FRFR without the Kemper DSP, if Celestion did not engineer in some strange driver EQ stuff to help Kemper with dispersion or DSP tricks. The driver would probably have the dispersion issues you get with whizzer cone speakers however, which apparently the Kemper DSP helps to tame.

Hear what Chrsistop is saying about the kemper kone starting at 2:00 and special about frequency at 3:40

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Honestly, I don't see why anybody would want to use these speakers/cabs with anything other than a Kemper. Sure, they're just standard passive speaker cabs, but what sets them apart is that Kemper has designed software for the the profiler to achieve specific sounds with these units. If you're running something other than a Kemper, there are options out there that will yield much better results.

Not meaning to be contentious, but you can take IR's of a system without a microphone. For example, some folks have taken IRs of EQ devices such as the Fishman Aura stomp boxes. But if you are copying the audible response of a driver you are emulating, how can you prevent using a mic in the process? I suspect the Kemper system might be using flat response mics and infinite baffle setups perhaps in an anechoic chamber to get neutral uncolored IRs of the speakers being emulated (this would prevent a cab from coloring the tone, that will happen when the Kone is placed in a cab).

One way of doing what Kemper is doing with the Kone (basically making one driver sound like a different one) is to use IRs and other DSP to make the Kone as close to a FRFR as possible, and then apply a second one to make the pseudo FRFR have the response of the driver being copied. Or use a IR pulse already EQd to emulate the reverse response of the Kone, and use that to make an IR with the driver being copied.

It's important to notice the difference here, because if you capture an IR of a Celestion speaker and just use it on a speaker, it is unlikely to be the same as the Celestion, because the speaker you are using has a different character.

Instead, based on the characteristics of the Kone, the Kemper uses DSP in order to impart certain characteristics to the signal being fed to the speaker in order to achieve a similar response to the speakers it models.

For some odd reason, my Roccat Kone XTD gaming mouse likes to disconnect by itself when I plug in, disconnect, or otherwise manipulate other devices that are attached to my computer. That includes such mundane things as touching a cable to a USB port (without even plugging it in) or probing a USB battery charger connected to the computer with a multimeter. It isn't happening that often, but it's annoying me enough to ask this question (and Google hasn't been very useful here).

When this happens, the mouse seemingly turns itself off and Windows gives me a "USB Device Not Recognized" error. Clicking the mouse restores the connection. On rare occasions, my Roccat Isku keyboard will reset itself as well. No other USB device I use exhibits this behavior.

The nature of this behavior makes me think the problem lies in the mouse not tolerating noise from the electrical ground of the computer. Aside from replacing the mouse, is there something I can do to address this problem? What might be the cause?

If this helps, the computer is a Sager NP8255-S (Clevo P157SM) running Windows 8.1 Pro. Updating the mouse's firmware did not help, and all drivers are up to date. Roccat Talk is installed and up to date as well. Event Viewer doesn't show any relevant events.

This indeed sounds very much like a problem with noise or (not certain about the correct English term here) erroneous voltage on the different shield wires around the computer. The usual debugging sequence for something like this is as follows (assuming you are in an area with separate Ground and Neutral wiring and have a general clue about working on electrical devices):

If this doesn't point to a problematic peripheral, the last thing I'd try is to run grounding wires from all components (PC, Monitor, Switch/Networking gear, peripherals and especially your USB hubs) to a central grounding point. Do not do this by yourself if you are not familiar with working on electrical systems. But this will offer the best and most robust way of getting unwanted currents out of your setup.

In Control Panel -> Power Options, click "Change plan settings",then "Change advanced power settings",in the dialog box expand the entry "USB settings", and set"USB selective suspend setting" to Disabled.

I've been having ongoing issues with USB 3.0 storage devices disconnecting while transferring data. Longer cables are more susceptible to this issue, while shorter cables are better behaved. Wrapping a cable in aluminum foil, funnily enough, prevents it from disconnecting. As this is independent of the actual device connected to the computer, it is clear that the computer is at fault, being abnormally sensitive to electromagnetic interference.

By extension, it would be logical to conclude that the computer's sensitivity to EMI is causing it to disconnect USB 2.0 peripherals when subject to interference spikes such as those generated by electrostatic discharge. The relatively long cables used by Roccat tend to amplify the issue as they can act as antennae and couple noise onto the USB ports.

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Malatino says a chunk of the grant money will go towards a new batch freezer to continue making his homemade Italian ice. The one he had before, broke. However, he needs more grant money to do that. The price of a new batch freezer around $12,000.

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