The Mandarin Graphic/OR120 has a very different EQ than all the modern Oranges (which are similar to Marshall's but voiced differently (cut only TMB tonestack).
The Mandarin Graphic/OR120 has a Bauxendall EQ which is a two band EQ which allows boost or cut for bass and treble bands. It also has a unique feature called a FAC (Frequency Analyzing Control), which is actually various coupling caps post distortion on a knob, very unique and cool.
So, turn the tones down and you have a mid boost, turn the tones up and you have a mid-scoop, and adjust the low-end tightness with the FAC, very cool design!
Gain-wise a tad more than a Plexi stock, but that can be adjusted etc.
OR120's also had a unique negative feedback loop (presence control with an inductor in the circuit) in their power amps that won't be duplicated via MTS and non-OR120 power amps, so that's a difference that won't be there in the MTS world.
They shipped back in the day with Fane speakers in Europe, and Eminence in the USA, though they sound great with Celestions too.
A lot of Martin Barre's vintage Jethro Tull tones were a vintage Burst into a OR120 through Fanes.
We made one for ourselves, sounds great either pushed or clean, and good for bass too.
Whoopysnorp said:
I've got a demo of the Mandarine Graphic here: http://genitalhercules.com/~mcrowe/misc_mp3/Mandarine%20Graphic%20demo.mp3
I talked too much in it, as I recall, but buried within my prattle there are some actual recordings. As far as authenticity goes, I can't say for sure because I've never played a real OR120, but I do hear bits on At The Drive In's Relationship of Command album that sound exactly like tones I get from the Mandarine Graphic, and I am pretty sure Cedric used an OR120 or similar on that album.
I also have a Stonerverb and I can tell you that it's very different from the Graphic. It still has the thick midrange sonic signature that the Graphic has, but the EQ behaves very differently (as it should because the EQ in the Graphic is a very different design). The Graphic is darker overall, and the Stonerverb is closer to sounding like what we think of today as a British/Marshallesque sound. Not to say it sounds like a Marshall, but the mids are voiced in a similar place (they are thicker and smoother in the typical Orange sound).