Spectral preamps


I've read that Spectral AMPS must be used with Spectral preamps and MIT interconnects and speaker cables.

Does the same rule apply to Spectral PREAMPS? Can they be used on their own with other manufacturers' amps?

I assume the same rule applies for amps and preamps, but just checking. Thanks in advance.
bigamp
Thank you all for the helpful advice. Based on what I've read, Spectral looks like a good option for a number of reasons. I will try to listen to their gear at a dealer. It's good to know that I can start with a preamp and go from there; I'm considering the 30SL pre and 260 stereo amp.

Paul (Punwin), are you using the MIT Z Powerbar with Oracle Z3 powercords? If so, I'd be curious to hear your thoughts on how the Powerbar may affect the sound, and whether you have compared it to other power products. Thanks!
Spectral is to be used in a complete system. You really have to go all or none.

I was going to try a Spectral preamp as well---but its just not an optimal setup without the amps.

There are benefits to this---but the big problem is if you decide to change routes, your entire system has to be put up for sale.

As far as sound---its whitish to me and sterile as an entire system. That is why I was hoping just a preamp could be a great solution.
>>> "This, to me, was a product, after having been so anxious to hear it left me very disappointed...to the point of wondering what 'all the shoutin' was about.' For those fans of Spectral, is there some magic combination of equipment that shows off what Spectral can do? "

Yes and it includes high quality speakers - w/o a reference to what you heard we fans can't be really sure why you heard what you heard. So, for example, if you are used to speakers which tend to emphasize treble because they are meant to be paired with amps that roll-off highs (perhaps because the amps can't get the highs right), then switching to electronics that can get the treble right may sound too bright, and rightly so.

So when anyone says I heard X COMPONENT and the sound was such and such, there really is not enough context around it to say anything. Suggest you also discuss this at the [unofficial] Spectral forum at http://whatsbestforum.com
I just switched from an Nagra preamp and am to Spectral 30ss and 260 amp. More transparent and I can hear small changes in cable/source. Not standard solid state. Very liquid, open, defined stage. I'm very happy with the change.
Here is the technical reason why Spectral electronics MUST be used with MIT cables:
Spectral's designers believe that for best sound, amps and preamps must be able to pass ultra-wide bandwidth, in the Mega Hertz range.
Their preamps have no RFI filters and their power amps have no filter (zobel) networks at the output, therefore, Spectral gear depends on outside filters to be unconditionally stable, hence the recommendation to use MIT cables.
MIT cables include "networks" at both ends, these are actually RFI filters, which prevent oscillation and filter out-of-band noise.
In summary, anyone who chooses to ignore Spectral's recommendation is doing so at his own (and hist tweeter's) risk.
Enjoy the music!