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The TS-9 would be discontinued in 1985 due to underperforming sales, but not before a variant was released called the ST-9 Super Tube Screamer.
The original Maxon OD-808 used MC1458 op-amps, essentially a dual 741, which is much lower fidelity than the ones used in the later Tube Screamers.
Additionally, the “STL Super Tube” was the same circuit as the ST-9 Super Tube Screamer except that the variable-frequency boost was cut-and-pasted after the clipping stage instead of before.
In 1986, the Master Series was discontinued and the “Power Series” was introduced, more commonly referred to as the “10 series”.
This is probably because Ibanez was in a hurry to get it to market and they couldn’t wait for the new PCB design to be finalized, so they just used Maxon’s existing design for the first run.
In 1982, Ibanez rebranded their series of effects pedals with the “9” suffix (e.g. The TS-808 reappeared as the TS-9 Tube Screamer, dropping “Overdrive Pro” from the name (which curiously would later be reused for the Maxon OD-820 Overdrive Pro).