I had an EAD TheaterMaster 8 paired with a Citation 7.1 amp. Upgrading the amp to an EAD PowerMaster 1000 brought noticeable benefits in sound and clarity. Upgrading the preamp to a TheaterMaster 8800 brought smaller benefits in sound quality but did provide component video switching and other benefits. I would upgrade the amp 1st unless you need the other inputs and processing provided by newer preamps.
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