Another deep dive and completing my run of the JCM900 series, the dual reverb. This particular amp is a Reissue model made in 2013, but the circuit is the same as any normal production run JCM900 and is equipped with 5881 power tubes (as most DR’s were throughout the 90s). The tones of this amplifier are great for a certain type of music, but I can also see why some do not like this amp compared to more traditional Marshall circuits.
Additionally, there are LED clippers on the normal channel, and diodes on the gain channel too - as well as a multitude of opamp gain stages and some pre-EQing going on for the second channel. It’s certainly not as analog as other Marshall circuits and even if the diodes were clipped/removed, it’s still largely opamp powered - this amp only has one single preamp tube gain stage in it (amps like 2203’s have 3 for example). Still, I think it really rocks for 90s punk tones and other high gain, bright tone - but it wouldn’t be my first choice for classic rock or old school metal.