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Model 9
Model 9
1992-2002
Reference poweramps consisting of two huge boxes per channel. One box is the amp itself, the other is a combination of a BPS and switched power supply that feeds it. Therefore, this BPS was not optional like the others. Unlike what you might think whem looking at them, they don't deliver that much power: 350 watts per channel. That's only 100 watts more than the model 6. They do draw more current though: 500 watts idle per channel and 1200 watts maximum. That's per channel!
Even though these amps reportedly sounded amazing; both delicate and refined as well as powerful and colourful, there seemed to be a problem with (a part of) the switched power supply. It has some parts in common with the model 10 that I owned and besides my own model 10's power supply problems, I've heard of and read about a few other occasions where (part of) the switched power supply broke down. I think there may have been a reliability issue in a batch of parts of the power supply but this is not confirmed. Nevertheless, when working, these amps are amongst the very best available. A recent response from a long time user indicates that the model 9 can also be utterly reliable. He has never had a problem in many years of use.
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Model 9ti
1992-2002 (estimate)
More modern version of the Model 9 above, with several circuit changes. Not sure though about the exact differences, or what's inside those tubes... could be batteries but I'm leaning more towards power transformers and no batteries at all.
Model 9ti HC (High Current)
1992-2002 (estimate)
Same as the Model 9 above, but with double amount of power transistors allowing double power output but also double power consumption: 1000 watts per channel idle and I don't dare guess what they take in at maximum power.
