| That is a great amp. The seller probably considered it outmoded or underpowered, but you'll find that it's far louder than any other 300-Watt-Rated amp out there. Part of why it's great is that it's designed to cut out the lowest of the low bass frequencies, which you DON'T want on stage anyway since they often just turn to mud and cover up your own thumping groove and a lot of what's going on sonically in the rest of the band.
The 100 Watt 8-ohm section is a bit of an outmoded design, but an added bonus if you want to stack 3 cabs for an outdoor show, or run an 8 ohm "floor monitor" to your drummer if your band is running its own simple PA setup. Then you only need to worry about vocal monitors.
The other thing about the (still in production and not cheap) and the discontinued 400RB is that their construction is more robust, repairable, and better sounding than modern printed circuit board amps. They do tend to hiss a little and you'll hear a little thump from your speaker drivers when you power down, but those are the only two negatives I find about them. I got my 800RB with a rack case and a minty vintage GK210T cab for $399, which is comparable to your bargain. I think they usually ruin closer to $350/400 used. Which is still one of the best bargains out there.
Let's see a photo!
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egad, a base tone denotes a bad age!
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Say it ain't so!
