So, here's some more info on the First Sound preamp I'm getting:
Basic Model: Presence Deluxe Mk III
Dual Mono Construction using Copper Plated Steel Chassis
• Step Attenuators, Ladder Type using individual resistors (see below), designated as LTH 92
• SPS 2.0 External Power Supply w/ detachable umbilical cord
The First Sound that is on loan from a friend...standard silver face plate and knobs.
Interior of chassis (photo from a review)
MkIII-S upgrade
• MPDA (multi-phase differential array) developed by Shunyata Research. A sophisticated and innovative proprietary power line noise reduction filter array. Uses advanced 30 element surface mount components that significantly reduce power line noise.
• PSDS (power supply delivery system) An advanced system utilized for the power supplies..
• Upgraded main circuit boards
• Upgraded power supply circuits boards
• Additional 500 extra steps in the craftsmanship of this upgrade
MKIII-SI Upgrade
• As above with the addition of proprietary component filters that isolate electrical noise.
Paramount Special Edition upgrade
As the Presence Deluxe MKIII-SI with the addition of:
• LTV 92 Step Attenuators, Ladder Type attenuators using naked Vishay Resistors
• Upgraded (Stage 3) Capacitors using AudioCap copper capacitors
• Expanded power supply capacitors
• Special Edition grounding topology
Volume attenuator
Interior copper chassis
My unit will be a black chassis with gold knobs, for an MBL-vibe.