The UAD Marshall Silver Jubilee plugin was developed by Softube. They worked with Tony Platt (from AC/DC and Iron Maiden fame) to capture this legendary guitar amp accurately. The Silver Jubilee was essentially a JCM 800 with a modified high gain preamp. The Jubilee cabinet had 4 Marshall Vintage 30 (Celestion) speakers.
There were 2 sets of mics used, a condenser set and a dynamic set, each with 2 close mics and 2 room mics. One of Tony Platt’s tricks was to add a delay time to the 2nd room mic. This was applied to guitar solos in the late 80s to make them wider.
The Low/High switch toggles the power amp output. High is pentode, and Low is triode. The triode offers a darker sound by lowering the amp’s output power to half. The Presence knob acts as a treble boost. It uses a technique reduces the negative feedback form the power amp section, that is applied to the higher frequencies. The Bass/Middle/Treble knobs are pretty standard EQ options. The Output knob controls the volume of the power amp.
The Light next to the Lead Master knob will toggle from Normal to the Lead channel. And the knob will control the volume level of the Lead channel. The Rhythm Clip light will turn on the clip mode, which has been described as more of a JCM 800 type distortion. The Input Gain sets the amount of gain fed into the preamp. On the hardware model, you pull the Input Gain knob to set Rhythm Clip.
Additionally, you get a mixer section that offers control over the mics. You can select Dynamic (Shure SM7b, SM57, Neumann U87, Telefunken ELA M 251) or Condenser mics (Neumann U67, U87, Coles 4038, SE Electronics RNR-1). There’s faders to adjust the mix of each mic, as well as the ability to pan each. The 4th mic allows you to set a feedback (room delay) time as well as the amount of feedback. There’s a noise gate and a master output as well.
Here are some audio examples using a 2005 SG with Burstbucker pickups and a 1995 Stratocaster with stock pickups. Mostly default presets were used, but a few may have been tweaked a bit to reduce clipping.
Check out our review of Amplitube’s Mesa Boogie emulation.
The UAD Marshall Silver Jubilee plugin is a solid choice if you are just starting out and don’t have a ton of guitar amp emulators. Keeping the Input Gain low and using the Output to control the Master volume will allow you to get really pristine cleans. Cranking the Gain will give you some nice dirt. The Lead channel can even hold it’s own in the metal world. Slash used this amp, as did Joe Bonamassa, so that gives you an idea of its diversity!