How the Signal
Gets to the Glass
Twenty-five consoles, thirteen Sony professional monitors, and not one scaler in the building. Here is the actual path a picture takes from a cartridge to a broadcast tube — cable by cable, box by box.
Every article about professional monitors, this site's included, spends its time on why: why RGB beats composite, why a BVM shows you the truth. Almost none of them tell you how — what you actually buy, what plugs into what, and what happens when you try to put eight consoles on two screens. That gap is the reason a lot of people own one PVM and one modded console and still have them sitting in different rooms.
So here is the whole thing, unglamorous parts included. Two rooms, two nearly identical chains, and one deliberate omission that shapes everything else.
The chain, end to end
Game room
Eight consoles, two big PVMs, one switcher doing all the work.
Garage arcade — the broadcast pair
The same idea again, in the room where the serious glass lives.
Garage arcade — the LMD wall
A completely separate system, and the one people ask about first.
The switcher is the whole trick
The single component that makes a collection this size usable is the GSCARTSW — an eight-input, two-output RGB SCART switcher, and there is one in each room. Eight consoles stay permanently plugged in. It auto-switches: power on the Saturn and the Saturn takes the screen, no button, no menu, no crawling behind a rack. That sounds like a convenience feature. It is actually the difference between a collection you play and a collection you look at.
Two outputs, two monitors, one per screen. That is why each room has its own switcher rather than one big one feeding the house — a second unit is cheaper than the cable run, and it means the garage never has to wait for the game room.
SCART goes in, BNC comes out
Here is the join that trips people up. The console world speaks SCART — a fat European connector carrying RGB and audio in one plug. The Sony professional world speaks BNC — individual coaxial connectors, one per signal, twist-locked, because a broadcast engineer is not interested in a cable that can fall out. A PVM has no SCART socket and never will.
The bridge is a SCART to 4 BNC breakout cable — red, green, blue and sync on four BNCs, with an audio pair broken out alongside. The ones in use here come in both male and female SCART variants, depending on which end of the chain they land on. That single cable type is what makes the whole collection possible; without it the two halves of this hobby simply do not connect.
Sync goes straight through. No stripper, no LM1881, no sync-on-green workaround — the composite sync riding on the SCART cable goes into the monitor's sync BNC as-is, and these monitors lock onto it without complaint. Professional Sony gear is far less fussy about sync than internet folklore suggests.
The audio nobody plans for
The AMS-100s sitting on top of the monitors are not decoration. They are fed from the same breakout cables — the audio pair that comes off the SCART side, running into the audio monitor rather than into the CRT's small internal speaker. It is the correct period arrangement, it is how a real edit bay was laid out, and it sounds dramatically better than any CRT speaker ever did.
This is the part most home setups skip, and it is worth not skipping. You go to enormous trouble to get the video signal pristine, then listen to it through a two-inch driver behind a metal grille. The audio path deserves the same attention as the video one.
The wall is a different animal
The LMD rack does not run on any of the above. It is component video, not RGB SCART, and it is fed from a single source through a CE Labs AV901-HD distribution amplifier — one input, nine outputs, unity gain into 75 ohm terminations. A distribution amp is not a splitter; a passive splitter halves your signal every time it divides, and by the ninth monitor there would be nothing left. A DA buffers and re-drives, so the last screen in the chain looks like the first.
What feeds it is deliberately mundane: a receiver playing video off a USB stick, with a PS2 switchable in when someone wants to actually play something. The effect is the point — every LMD in the rack showing the same frame at the same instant, which is precisely what these monitors did in the machine rooms they came from.
The cabinets are not part of any of this
Worth saying plainly, because it is the question that follows: none of the arcade cabinets touch the switchers, the breakout cables or the distribution amp. Each one is a closed, original system — its board drives its own monitor inside its own cabinet, the way it left the factory. They are not all JAMMA and they were never rewired to feed the rack.
That is deliberate. A cabinet that has been opened up and re-plumbed into a modern signal path is a cabinet that has stopped being the thing it was. The monitor fleet exists to serve the consoles; the cabinets serve themselves.
What it costs you
Honesty about the trade: this setup is analog end to end, which means it is fussy in ways a modern one is not. Cables are specific and mostly not available at retail. Every console needs the right RGB cable for that console, and some of them need modding before they output RGB at all — the NES never did officially, which is why the top loader here carries an NESRGB board. Nothing here will ever appear on a flat panel without adding exactly the kind of box this setup refuses to use.
What you get in return is a picture with nothing between the console and the tube, and a room where you press a power button and a game is on screen a second later. For a collection meant to be played rather than displayed, that trade has never once looked like the wrong one.
Curious what the monitors on the other end of these cables actually are? PVM vs. BVM covers the difference, and the fleet roster lists every unit. The consoles doing the sending are on the consoles page.