Bassblaster
Super Member
at this point im almost sure the 800 was simply a cheaper version of the 880.I own the 880 but have never owned the 800 but from what I have read here, the only difference between the two is the 800 uses the extra circuit boards for the external voltage taps for the matching tuner and cassette tape deck. They look identical from the front.
From what is known, the tuner and cassette deck are not 120 volt and do not have conventional wall plugs so the 800 supplies the 15-24 (or whatever) volts it puts on the connectors in the rear.
The 880 does not have this option but it still uses the same STK-0080 amplifier blocks. Even though the meters say 100, the STK reference book I have says these 0080 amp blocks are only rated at 80 watts.
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STK-0080's are rated at 80W at somithing like 0.02% THD. they will put out 100W but distortion starts to hit the 1% range then. if i could find it i would post it but i saw a guy on YouTube a while ago and he benched the STK-0080 at just a hair over 100W on 55V rails. Not Bad.