@sqitis As I recall way back the F1 package upgrade well over a decade ago was originally inspired and offered by Upscale Audio. Unless you send in your unit and pay Cary for the upgrades, intel may not be shared. Different people there. I have the SLP-98L with all the upgrades in mine w/Grayhill switch. Here is what i have from my notes, and a site visit today to validate what’s listed right now for the new unit upgrades. A really good tech in your region can upgrade these with good parts too.
I’d recommend using a local tech, if you can. Save on shipping costs to pay for even better upgrade parts, and reduce risk of back-and-forth shipping damage
IIRC, the original F1 inspired package offered, went something like this:
- Jensen oil and copper capacitors, Hexfreds in the power supply, Kimber cable wired for one of the inputs, real WBT speaker terminals, Grayhill selector switch, +F1 colors.
Today, the new units offered show similar upgrade options minus flashy paint:
- Silver or Black color, Hexfred Rectifiers x4, One Kimber wired input, Mundorf MCAP EVO Silver-Gold coupling caps, MCAP EVO Silver.Gold.oil for output capacitors. (not seeing Grayhill switch listed).
If you have a unit now or buy a used one, you could try first by upgrading the caps and install your favorite 6SN7 tubes in it. Double box/pack well if you ship it in!