Check it out here : http://www.diyaudio.com/forums/solid...sound-jc1.html
No I still do NOT think it was becouse my JC1's did clip Valentine
Check it out here : http://www.diyaudio.com/forums/solid...sound-jc1.html
No I still do NOT think it was becouse my JC1's did clip Valentine
sorry you are probably right
shureI really do not think that my Parasound JC1 can clip...
I thought it best to place a few items regarding actual K2 S9900 listening experience here, just in case someone looks for more on these sublime loudspeakers. After all, this may be the last, great Northridge designed and built product in the Lansing Heritage. I know I've been visually impressed with the new K2s on my visits to Northridge, and I've been in awe of the assembly and driver manufacturing.
Anyway, at the California Audio Show in the Design Interactions room, Widget and Co. held forth with a day-long Everest II, 1400 Array, and Revel Ultima 2 Salon demo, until we prevailed on them for the K2 to get a shot after hours.
I wrote:
andOriginally Posted by Titanium Dome
Originally Posted by Titanium Dome
Out.
Ian Mac was there (hey Ian! ) and it's always a pleasure to spend time with such an affable and fun gentleman.
He wrote:
andOriginally Posted by Ian Mackenzie
Originally Posted by Ian Mackenzie
Out.
My reply:
Originally Posted by Titanium Dome
Out.
So there you have it. Of Lansing Heritage members, only a small number (not counting Mr. Widget) were present when the K2 S9900s were briefly fired up.
Bo
Ian
Dave
Doug
If Bo or Grumpy have anything to add, of course it would be welcome, as they were among the lucky few to actually hear them in this after hours treat.
Out.
Ah, there's this exchange between 4313B and Grumpy, too.
Originally Posted by 4313BOriginally Posted by Grumpy
Out.
Hello Loffen, I read this post, and then the thread at diyaudio, and have something to add to what may have happened to your speakers.
Although your JC-1 may not have been driven into clipping, and probably wasn't, the Parasound HALO JC-1 is capable of putting out and delivering 135 amperes of PEAK CURRENT! So, even though you weren't overdriving the amplifier, it did put out a massive amount of current, which exceeded what the resistors you burned up were capable of handling.
The Parasound HALO JC-1 is a massive amplifier, well made, and the HALO amps have massive power transformers, enormous amounts of filter storage capacitance, and lots of high current output devices. The HALO amps, especially the JC-1, are designed to produce high output current, and you, even though not overdriving the amp, exceeded the safe limits of certain components in your speakers.
But you have great taste in amplifiers as the HALO JC-1 is an incredible amp. However, with the Parasound HALO JC-1 output rating of 135 amperes@8ohms, it is an amp to be careful with. You did NOT clip or overdrive the JC-1, you exceeded the current carrying capability of the resistors in the passive networks. Which is why Mr. Greg Timbers offered to send you heavier duty resistors that CAN handle the current you will put through them.
scottyj
Minor point: 135A@8 ohms? That's over 1000V
135A peak? OK, I'll buy that... -very- briefly, at maybe <0.1 ohms.
Make sure to clean up the arcing from the connector after trying that
To say that it will behave as a true voltage source down to
very low impedance (it -is- rated at 1200W@2 ohms) is still
saying a lot. That it can continue to output relatively obscene
power levels when other home equipment would fail or shut down,
is a potential that doesn't give you a clue that the load could be
internally melting (with that "load" being designed with a certain
peak/crest/avg duty cycle expectation that was apparently exceeded).
-dave/grumpy
Re: K2-S9900, on my short list (regardless of $ or "type").
Dave, it is rated 135amps@8ohms PEAK so yes your correct, I forgot to add that. But, some things can't stand even momentary bursts like that, IF high enough I am sure your aware.
The HALO JC-1 is still a massive amp, by any standards.
scottyj
just not into 8 ohms ( -that- was my minor point... it would need a 1000+v power supply ) ...
the rest looks all good to me
With all this focus on amps, what would you drive a pair of K2S9900s with? This is an open question for anyone, not just those dragging out the Parasound story.
Widget would likely say Levinson or Pass, and Ian would probably say Pass as well, but they can of course speak for themselves on this issue.
There's the old joke about the guy who asks a Texan how much it costs to drive his Rolls Royce (or some other car), and the Texan replies, "If you have to ask, you can't afford it."
Well, I'm asking anyway. I doubt that I would be able to get a current Levinson, Pass, or other $$$$$ in addition to a $$$$$ pre, $$$$$ source, and K2s at the same time. OTOH, a Soundcraftsmen from 1990 isn't going to cut it either. There are a lot of pro amps that could handle the job, but NO ONE drives this kind of gear with a pro amp.
Maybe a Synthesis or two (bridged), or one of the new ATI Balanced models (or a derivative like Theta)? If you were limited to staying under $3-4k, what would you be looking at?
Out.
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