I'd like to attempt a hifi amp build. If this forum is only appropriate for guitar amps, I completely understand and will refrain from posting here, please let me know. I've completed several successful guitar amps now, but for whatever reason I feel a bit uncertain about a hifi amp project. So I'm going to try something simple and see how my knowledge will transfer. This will be from the perspective of a guitar amp maker dipping into the hifi world. Build Objectives - I play my music off my computer. I run it into an audio interface for Digital to Analog conversion. Then I run that into a solid state receiver. I run that into a pair of Overnight Sensation bookshelf speakers that I built a while back. https://www.parts-express.com/overnight-sensations-mt-speaker-kit-pair--300-706. - I want a device that can replace the solid state receiver I'm using. - I want to draw on my guitar amp experience as much as possible - meaning 12A*7 tubes in the preamp feeding SE EL84 or 6V6's in the power section. - Simple PTP wiring. Not interested in a kit as I can source my own parts. - Budget friendly. Circuit At this point my biggest question is about what type of circuit I should use. I found a nice list of schematics here - http://diyaudioprojects.com/Schematics/. I also made a reddit post looking for input here: https://www.reddit.com/r/diytubes/comments/antdqg/diy_hifi_amp_build_need_circuit_advice/ I got a lot of good input. I'm treating this as a little bit of an experiment. I really don't have a lot of experience in the hifi audiophile world with nice gear. I perceive I could quickly start spending a lot of money on this project, which I don't really want to do. Perhaps I'm shooting myself in the foot, but I'm going to try and be pretty frugal on this build. One decision I'm going to make off the bat is to use a power transformer I have sitting on the shelf. In my experience it is best to start with the power supply and work backwards from there. The PT I have in mind is labeled 40-16519. I found some information on that PT here - https://www.amplifiedparts.com/products/transformer-fender-replacement-power-330-0-330-v-120-ma and it is described as being a Deluxe Reverb PT. This provides the following specs: In a hifi amp everything is in stereo - so I'm thinking a stereo Single Ended 6V6 output section could be ideal. My perception is that the output section of a tube amplifier really won't differentiate that much between a guitar amp and a hifi amp - but I could be wrong. I've been reviewing many hifi schematics and find they tend to be more robust in the power supply in terms of filtering to reduce noise. They also tend to use negative feedback or other design choices to keep things clean - especially in the preamp. Lastly I would estimate that the output transformer and speakers used are HUGELY different. Looking further I discovered a nice schematic here - http://diyaudioprojects.com/Schematics/SE-6V6-Amp-Lacewood-Schematic/ I may make some modifications. I'm thinking a 12AX7 instead of 6SN7 just for familiarity and I already have a stock of 12AX7's. Probably a volume control on the input. I may tweak the rectifier and filtering a bit too. Any input or advice going into hifi would be very welcome. Away we go!