Are you new to Mesa?
If so... prepare for a world of patience in finding
your tone!
For about the first 2 months I had my Recto Pre, I was changing my settings about every day. Eventually though, you just start finding these points where the settings are working for you. You'll find them too, but with time. Someone with more experience with a Mesa could probably better help you in getting
near a desired sound that I (IE, I'm looking for a sound similar to blah uses on the blah-blah album, etc). So just let people know what you're going for and they can guide you near it. But I'm still tweaking my settings about every other week (seems perfect now, but in a week it justs seems a little off, lol).
Also some just FYI... the MODERN mode isn't going to sound like the actual Dual Rectifier on modern if you're running it into a 20/20. It's basically "missing" the circuitry that makes that mode unique in the power section; to get the complete sound you would need a 2:100 power amp, because it features the circuitry to make it match the real-deal Dual Rectifier. But, this is only in note of the live-outs in the recto pre. If you run the Recto Pre on the recording-outs for recording though, the modern mode will sound pretty much like the real-deal.
I'm running mine mainly for recording and practice (since I can play it through my surround sound system). I'd have it through a cabinet and poweramp for practice and crap, but unfortunately the 2:100 isn't cheap.
Maybe for some reference... my settings on the recto pre (doing recording-out) is:
- Settings for 2nd channel on Recto Pre:
Mode: MODERN
Gain: ~3:00 (I'm running low-output pickups though, ~200ma; you'll want to pull the gain more towards 12:00 if you're running higher gain pickups)
Treble: ~1:00
Mids: ~10:00
Bass: ~12:30 (meaning between 12:00 and 1:00)
Presence: 0 (turned all the way down; I don't have experience in live-outs, but for recording, it just seems to me that turning up the presence is like turning up a "fuzz" control, or at least it isn't bringing me towards a sound I'm looking for)
Master Volume: ~10:30
Preamp Voicing: WARM RECORD
Recording Output (volume): ~2:00
If you're running just recording, the manual suggests turning the LIVE OUTPUT and SOLO to zero.
The Recto Pre also outputs at professional line level (+4dBu)... meaning you will not be able to record nice samples with the recto unless your sound card/mixing board/etc can handle professional line level as an input. I had a problem with this when I first got mine. Thing sounded like crap and I was puzzled. After some searching I learned that my sound card was normal 'consumer level' (-10dBv), and the recto was +4dBu. After getting a new sound card (Echo Mia Midi) and setting it to +4dBu input, it sounded GREAT.
However, I recently just added a compressor to my rack (which now consists of a total of the Recto Pre and Alesis 3630, lol; it's slowly growing). I really like the sound I am getting with the compressor working after the recto pre.
Really lost track of your question/comment so I'll end it here, lol... if you got any questions about the Recto Pre, just ask. I'll answer them as best I can.