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
Google the reviews, goes both ways. If this is a deal where you cannot demo the equipment do not do it. I have listened to the Spectral Mit combo in years past. My impression was that it was great for people with high frequency hearing loss.
I use a full Spectral system - 30SS preamp, 260 power amp and 4000 pro CD player. I am pretty convinced of the system as a totality. I am not sure how well it works if you switch and swap.

As to Jegyed's slight acerbic comment. As most of the people who can afford high end will be beyond the first flush of youth they will, inevitably, have begun to experience high frequency loss. However, my experience with Spectral is nothing to do with the high frequencies. Rather it is a density of tone, a richness, that I have not heard anywhere else. Simply put it sound like music.
I'm not sure that Jegyed was being intentionally 'ascerbic', though it read that way.
I too have been in that camp of folks who did NOT like the HF presentation of Spectral, thinking it really forward and bright sounding. 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?

Larry