My main system is a space I built in a loft above my garage. It's fully horn loaded from 20->20K Hz with built in bass horns driven with VTL MB-125 mono amps and the 3-way mains driven with SET 300B amps with Western Electric 300B tubes.
System and room are built for analog playback. 3-way mains are fully time aligned. Due to the length of the bass horns there is a 5-6msec offset below ~65 Hz. In human hearing the small of an offset in that range is rarely perceptible, but digital time correction is not an option in a full analog system.
Front end currently includes my Super Nova Vacuum Platter TT with Triangle Art Osiris arm (table can also mount my SME type IV arm, but not currently mounted) and my BE 12C broadcast deck with Karmadon replica of the classic Gray research 108 viscous damped arm.
Phono stage is currently a Pro-Ject Tube box DS2 which is able to take multiple inputs and tunable for gain and loadings between MM and MC cartridges.
Pre amp is older Conrad Johnson Premier 17 that is upgraded with their teflon caps.
Power for the room is a couple of dedicated circuits with isolated grounding and additional power conditioning.
Main speakers include Cogent DS 1448 midbass and DS-1428 midrange field coil compression drivers and Fostex T-925a horn tweeters. Mains sensitivity is ~115db 1w/1m. Bass horns are built into the room and put out ~ 106 db 1w/1m below 80Hz down to 20 hz.
Room includes extensive millwork for diffraction. The record cases have upholstered backs with the space behind them stuffed with R-39 insulation: they are effectively bass traps. A heavy rug and some absorptive panels for first reflections and additional ceiling diffraction complete a room with very rapid decay times and few modes from reflections.
I cannot overstate how important good room treatment is for best playback. A well treated room will make mediocre equipment sound good while an unterted space can render the best equipment unlistenable.