So long as you can maintain solid connections and minimize voltage drop through the cord, i don't see any problems with doing so. After all, other than an extra point of connections, it would be the same thing as running longer Romex to a closer outlet.
As to mating an amp to a preamp from the same manufacturer, i typically find this to be too much of a good thing. That is, the engineers / designers that built the gear typically have a specific sound or type of circuit design that they like to use. This typically results in a "house sound". Compounding multiple components with the same house sound can result in an over-abundance of that sonic signature. That is, unless you REALLY like that sound. As such, i typically find better results by mixing and matching components.
Others may bring up the point that one has a better chance of finding "system synergy" by using gear that was designed to work together from day one, but as mentioned above, i find that there are potential drawbacks. Obviously, how noticeable this is will depend on the individual components and / or manufacturer of the gear. Cosmetically speaking, it's typically hard to beat using the same manufacturer for multiple pieces of gear, but in my book, cosmetics come second to performance. Sean
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