This week's office system:
On the left, a power amp I built using a pair of TDA2030 monoblock boards, powered by a linear 24v DC power supply. I like having a volume control on my power amps (so I can use an active preamp like the Quad 33 I've restored and still retain good range on the preamp volume control), so this one has an ALPS Blue. On the right, my hand built passive preamp. I built this exactly to my needs: an Elma selector gives me 4 inputs, there's a line out and a pre out. Dual mono Khozmo stepped attenuators, with 48 steps, give superb fine volume control and a lovely action, as well as providing balance control. And a stereo/mono toggle switch, because I can't live without a mono switch when I'm listening nearfield to early hard-panned stereo mixes. All hand-wired point to point with some 47 Labs OTA cable I had left over from years ago (which is what I also use as speaker and interconnect cable). High quality gold connections everywhere, ofc. On the shelf below is the NOS Lite DAC AH (8 paralleled TDA-1543 chips). This replaced a 47 Labs Shigaraki DAC which I sold for a crazy amount of money and sounds absolutely fine.
CD transport is still the Shigaraki, which I've had for over 16 years and will see me out (I have two spare transports for it, and it takes literally 10 minutes to replace a transport, so it's easily maintained). The Pro-Ject DAC is used for a Yamaha streamer and my laptop.
Turntable is the Leno GL75 I've recently restored. The poor Thorens TD-150 isn't getting much of a look-in at the moment.
Phono stage is a Pro-Ject Phono Box DS2, which is completely configurable from the front panel (I swap cartridges a lot, so this is handy), and sounds terrific for the money (Pro-Ject's, ahem, project range is confusing, but they make good phono amps). I preferred it to some much more exotic (i.e., expensive) alternatives (I'm looking at you, Chord Huei and GoldNote PH10).
This week's speakers are Stirling Broadcast 60th Anniversary LS3/5as in DIY cabinets (I didn't build these). Speaker stands are last weeks speakers (DIY Jordan single driver transmission lines, which I *did* build), which get the LS3/5as to the ideal height. Easter card made by my daughter when she was much younger.
Next week will probably be a 2 WPC Elekit DIY valve power amp, the Quad 33, and the Jordan speakers. Unless the weather gets hot, because the Class A Elekit runs very hot.