holdsworth
Well-known member
After Toquay kindly gave me a link to download the original Mark IVa instruction booklet (thanks for that!) I have been trying out the sample settings, which are totally different to the Mark IVb booklet.
The first sample setting I tried 'Classic LA' completely blew me away! After dialling it in I understood the true sweetness of tone this amp was capable of, and it dawned on me that I had been dialling it in all wrong for the type of sweet sustain I was after. I ignored Mesa's advice to stay below '7' for drive and '8' for gain, and in doing so completely over-saturated the tone (which most users are doing) and neglecting the Mark IVs sweet mids!
Try this setting, and like me, you too will achieve tonal nirvana!
CLASSIC L.A
Skanky R1 Clean Sound/Grinding R2 Crunch Rhythm/Blistering Lead Solo Sound:
R1G = (p) 3
R2G = (p) 10
T = 6
B = 3
M = 6
R2T = 8
P1 = 5
P2 = (p) 5
PL = (p) 4
LG = (p) 8
T = 7
B = 4
M = 10
LD = (p) 7
R1M = 7
R2M = 3
LM = 3
Output Level = (full) 2-3
Harmonics Triode Simul-Class
Optional E.Q (use this for very heavy rhythm work and with/without E.Q for soloing!):
80 = 3/4 above centre
240 = centre line
750 = 3/4 below center
2200 = centre line
6600 = centre line
...try adding delay to the clean channel to get a perfect silvery 'Manhatten' or 'Tender Surrender' tone!
The first sample setting I tried 'Classic LA' completely blew me away! After dialling it in I understood the true sweetness of tone this amp was capable of, and it dawned on me that I had been dialling it in all wrong for the type of sweet sustain I was after. I ignored Mesa's advice to stay below '7' for drive and '8' for gain, and in doing so completely over-saturated the tone (which most users are doing) and neglecting the Mark IVs sweet mids!
Try this setting, and like me, you too will achieve tonal nirvana!
CLASSIC L.A
Skanky R1 Clean Sound/Grinding R2 Crunch Rhythm/Blistering Lead Solo Sound:
R1G = (p) 3
R2G = (p) 10
T = 6
B = 3
M = 6
R2T = 8
P1 = 5
P2 = (p) 5
PL = (p) 4
LG = (p) 8
T = 7
B = 4
M = 10
LD = (p) 7
R1M = 7
R2M = 3
LM = 3
Output Level = (full) 2-3
Harmonics Triode Simul-Class
Optional E.Q (use this for very heavy rhythm work and with/without E.Q for soloing!):
80 = 3/4 above centre
240 = centre line
750 = 3/4 below center
2200 = centre line
6600 = centre line
...try adding delay to the clean channel to get a perfect silvery 'Manhatten' or 'Tender Surrender' tone!