THANKS, for your interest . . ( Replies, Welcome !! ) I assure you of personal experience (music production), that the following info will provide you with a satisfying result; based on the Marshall 1959/ 1987 amplifiers. That said, I have ultimately gained the sound-knowledge of these musical machines; whether such be 6L6, or EL34-based TONES. Otherwise, for practical reasons I choose to record through the orig. Line 6 Pod HD Pro modeler, as well . . Example : I have created a personal program patch which, has an uncanny sonic-resemblance to those particular EL34-loaded amps. An alternative speaker cabinet *(1x12) was substituted for the typical, matching 4 x12 (due to overall, sweeter tonality). Provided below, are the exact settings I employ for recording purposes : Vintage, Marshall-Style Amplifier 1.) Distortion/ Tube Drive : 84%, Bass 51%, Mid 2%, Treble 41%, Output 75% 2.) Dynamics/ Blue Comp : Sustain 14%, Level 98% 3.) Dynamics/ Boost Comp : Drive 70%, Bass 50%, Comp 5%, Treble 40%, Output 53% 4.) Brit P-75 : *112 BF Deluxe, 421 Dynamic 5.) Volume A : -3.0 dB, Pan A/ L 96% 6.) Volume B : +1.0 dB, Pan B/ R 91% 7.) Studio EQ : Low Freq. 700 Hz, Low Gain -1, High Freq 200 Hz, High Gain -1.1, Gain -0.4 8.) Reverb : '63 Spring, Decay 19%, P. Delay 21 Ms, Tone 27%, Mix 84%, 9.) FX Loop : Send -25.0, Return +14.0, Mix 92%.