HammerheadAudio
Member
Are there any common mods for either of these 2 preamps besides changing tubes?
In the MPA Pro, I put in some 1960's RCA Cleartop 12au7a's.
In the MPA Gold, I put some 1950's RCA blackplate 12at7's.
The MPA Pro uses electrolytic caps all over, most being either Nichicon or Rubycon.
The MPA Gold is the same, except they are all generic branded caps from the look of it.
Both use socketed NE5532. The GOLD uses an OPA2134 (non socketed, but not SMD)
The PRO uses a TL074.
Schematic for the GOLD:
http://www.harmoniccycle.com/hc/images/sound/ART_MPA/ART-MPA-Gold-schematic.pdf
I can't locate a schematic for the MPA Pro
.
I love the way these units sound, so I am not really looking for any changes in particular, but I would like to try swapping out things and replacing things to see if I can get even more out of them for the very small amount of money I paid.
Thanks in advance!
In the MPA Pro, I put in some 1960's RCA Cleartop 12au7a's.
In the MPA Gold, I put some 1950's RCA blackplate 12at7's.
The MPA Pro uses electrolytic caps all over, most being either Nichicon or Rubycon.
The MPA Gold is the same, except they are all generic branded caps from the look of it.
Both use socketed NE5532. The GOLD uses an OPA2134 (non socketed, but not SMD)
The PRO uses a TL074.
Schematic for the GOLD:
http://www.harmoniccycle.com/hc/images/sound/ART_MPA/ART-MPA-Gold-schematic.pdf
I can't locate a schematic for the MPA Pro
.I love the way these units sound, so I am not really looking for any changes in particular, but I would like to try swapping out things and replacing things to see if I can get even more out of them for the very small amount of money I paid.
Thanks in advance!
