tubes 4 hifi
 "the path of least resistance is through a vacuum"

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SP14 preamp 2016 build photos

stuff the PCB with the resistors and diodes first

then add the tube sockets and capacitors and other parts

add the B+ and filament jumpers on the bottom side

optional Mundorf silver-oil output caps added to finished board

power transformers mounted to chassis bottom plate

rear panel with RCA grounds bussed together

closeup detail of output jacks and buss ground

closeup of optional Grayhill sealed selector switch

locking pins added to Grayhill selector at 12 and 5 positions

front panel with controls installed

grounds connected on master volume control

front panel controls wired but selector switch wiring not finished

closeup detail of gain/volume control wiring

fuzzy photo of selector wiring and source-tape switch

filaments and LED wired to bottom of PCB (and bypass cap on B+ added)

rear panel wiring done, power transformer connections to PCB

front panel wiring done (better photo of selector wiring)

power switch and LED (epoxy added to LED) . . . . . . . . . . .rear power connector and fuse wiring

tape in - tape out (orange right channel) - output2 - output1 (orange K40Y, white Mundorf)

finished preamp front panel

finished preamp rear panel

return back to SP14 main page

here are some photos to help you identify the parts to build the SP14

here's a link to the Don Sachs page who builds custom SP14s for premium customers check out HIS reviews!
Here's what Don has to say about the preamp . . . This is the finest preamp that I have ever heard!

inquire about any other options or modifications you might want via email . . . .

send email to ROY at:

 tubes 4 hifi
 "the path of least resistance is through a vacuum"