TLDR: The most dependable answer to how to connect multiple retro consoles to one modern tv is to group consoles by video format, route each compatible group through an AV switch, and feed the selected analog signal into one retro-gaming scaler. The scaler then sends HDMI to the television. Keep consoles that already output HDMI on a separate HDMI switch or separate TV inputs.
Do not begin by buying the biggest switch you can find. First list what each console actually outputs: composite, S-Video, RGB, component, VGA, or HDMI. Then choose a scaler that accepts the formats you intend to use. Your switches, cables, and adapters must pass those formats without converting them unnecessarily.
The basic connection chain
For a collection of analog consoles, the cleanest general arrangement is: consoles to compatible AV switch, AV switch to scaler, scaler to HDMI input on the TV. The switch selects the console; the scaler converts and processes its analog video for the modern display.
If the collection uses several signal families, build separate branches. An RGB SCART switch can serve RGB consoles, while a component switch serves consoles using YPbPr component video. Those branches can feed separate inputs on a multi-format scaler, provided the scaler documents support for them.
Consoles or FPGA systems with native HDMI do not need to pass through the analog scaler. Connect them to an HDMI switch, an AV receiver with suitable HDMI inputs, or unused inputs on the television. Combining analog and HDMI hardware at the TV is often simpler than forcing every device through one box.
| Console output | Typical routing | What to verify |
|---|---|---|
| Composite video | Composite AV switch to compatible scaler | Input count, stereo audio and correct composite support |
| S-Video | S-Video switch to compatible scaler | True S-Video switching and the correct connector wiring |
| RGB over SCART | RGB-capable SCART switch to scaler | RGB support, sync compatibility and cable wiring |
| Component YPbPr | Component switch to scaler | Supported resolutions, audio routing and RCA labeling |
| Native HDMI | HDMI switch or separate TV input | Resolution support, HDCP needs and enough HDMI ports |
Inventory the consoles before choosing hardware
Write down the exact console, regional model and cable currently attached to it. Two consoles from the same generation may not provide the same stock video outputs, and a modified system may behave differently from an unmodified one. Regional cable standards also matter, particularly in a setup that mixes SCART-oriented and RCA-oriented equipment.
Record four details for every device: the best output you can realistically use, the cable you already own, the resolutions or scan types it produces, and whether audio travels in the same cable. “Realistically” is important. A console may support better video after modification, but that does not mean a modification is the right first step for a working living-room setup.
- Console and regional hardware revision
- Stock or modified video output
- Current cable and connector type
- Composite, S-Video, RGB, component, VGA or HDMI signal
- Mono, stereo or separately routed audio
- Need for a CRT, capture device or second display output
This inventory reveals the minimum number of switch branches and scaler inputs you need. It also prevents a common mistake: buying equipment according to plug shape rather than signal type.
Choose the scaler before the analog switch
The scaler is the center of the analog side of the system. Decide which video formats it must accept before purchasing switches. A switch does not usually make an incompatible signal compatible; its main job is to select and pass one source at a time.
Retro scalers are designed around the unusual signals produced by classic hardware. When comparing them, inspect the official input specifications, supported scan types, audio handling, output modes and firmware documentation. RetroTINK, for example, maintains official product support and firmware resources for its video-processing devices. RetroTINK’s support documentation is the appropriate place to check current instructions for a specific device.
The Open Source Scan Converter provides another useful example of why input and display compatibility must be checked separately. Its documented inputs include SCART, component and VGA, and its reference material covers 240p, 480i and 480p sources. The same reference warns that television compatibility can vary with the selected output mode. The OSSC compatibility reference is therefore more useful than assuming every HDMI television will accept every line-multiplied mode.
Before committing to any scaler, check its documentation against your television model and preferred sources. A device supporting a signal on its input does not guarantee that every output mode will work with every display.
Do not confuse the connector with the signal
A connector tells you how equipment plugs together, but not necessarily what video format travels through it. SCART is the clearest example: equipment using a SCART connector may be wired for different video and switching functions. Likewise, an RCA plug can carry composite video, a component channel, analog audio or another signal depending on the equipment.
A passive plug adapter normally changes only the physical connection. It does not turn composite video into RGB, component into HDMI, or an unsupported sync format into a supported one. Active conversion requires electronics, and every added conversion stage creates another compatibility and troubleshooting point.
Use direct, correctly wired cables whenever practical. If conversion is necessary, identify what enters the converter, what leaves it, and whether the destination equipment supports that output. Avoid building an analog-to-digital-to-analog chain simply because the required adapters happen to fit.
Three practical ways to connect multiple retro consoles
Simple composite setup
For consoles already using yellow composite video plus red and white audio, a composite AV switch feeding a compatible scaler is the least complicated shared arrangement. It is a sensible option when easy switching matters more than extracting the cleanest possible picture from every console.
Choose a switch with enough inputs, stereo audio support and a clear manual selector. Leave at least one spare input if the collection is likely to grow. This setup will not match the clarity available from RGB or component-capable consoles, but it avoids replacing every cable and rebuilding the system at once.
RGB-focused SCART setup
An RGB-focused collection can use correctly wired RGB SCART cables from each console into a purpose-built SCART switch, followed by one RGB connection to a compatible scaler. Confirm the sync formats accepted by both switch and scaler rather than relying on the word “RGB” alone.
Automatic source selection is convenient, but retain a manual override. The Games Care Smart RGB Switch manual documents eight SCART inputs, two SCART outputs, automatic and manual selection, and support for several signal types. It also notes that automatic switching can fail when the required switching connection is absent from the cable. That is a cable-dependent limitation, not necessarily a failed switch.
Mixed-signal hub
A larger collection may need an RGB switch and a component switch, with composite or S-Video handled through another suitable input path. Each switch output connects to the corresponding input on a multi-format scaler. The scaler’s HDMI output then becomes the only analog-console connection occupying the TV.
This arrangement costs more and creates additional cable management, but it preserves the better native output available from each console. It is usually preferable to converting every source down to composite or converting each console separately to HDMI with unrelated adapters.
If the scaler lacks enough simultaneous inputs, use the television or AV receiver as the final switch. For example, one scaler can serve RGB sources through HDMI 1 while a second scaler or component solution uses HDMI 2. A single TV input is convenient, but it is not worth introducing poor conversions merely to achieve it.
Plan for 240p, 480i and 480p
Classic consoles do not all produce the same kind of video. Many earlier systems and games use low-resolution signals commonly described as 240p, while later consoles may switch between 240p, 480i and 480p depending on the game and settings. Your scaler must handle the modes produced by the consoles you intend to connect.
Pay special attention to games that change resolution between gameplay and menus. The signal chain may need a moment to resynchronize when the mode changes. Whether that transition is smooth depends on the source, processor, selected output mode and television, so avoid assuming one published compatibility result applies to every display.
Once the hardware is connected, test representative software from each console. Include a game that uses the console’s common mode and, where applicable, one that switches modes or supports progressive scan. Enable the television’s game or low-latency picture mode if available, then compare scaler output settings for stable synchronization and comfortable play.
Handle audio, power and daily usability
Video compatibility gets most of the attention, but audio routing can make or break the finished setup. Verify whether the scaler embeds analog audio into HDMI or expects a separate audio path. If sound goes to an AV receiver or powered speakers, make sure switching the picture also switches the corresponding audio.
Label both ends of every cable with the console and signal type. Keep video cables away from crowded power adapters where practical, and avoid putting the entire collection on one undersized power strip. The consoles do not all need to remain powered merely because they are connected.
Manual switching is not a failure. A clearly labeled selector can be more predictable than automatic detection, especially in a mixed collection with unusual cable wiring. Place the selector where it can be reached without pulling the cabinet away from the wall.
Common mistakes to avoid
- Buying a switch before confirming which signals the scaler accepts
- Assuming matching plugs guarantee compatible video
- Sending every console through composite when better stock outputs are readily available
- Using several low-cost format converters in series instead of one suitable retro scaler
- Ignoring audio until the video chain is complete
- Buying exactly enough ports and leaving no room for another console
- Assuming every scaler output mode works on every HDMI television
- Changing cables, switch settings and scaler settings simultaneously while troubleshooting
When something fails, simplify the path. Connect one console directly to the scaler with a known-compatible cable, then connect the scaler to the TV. Once that works, add the switch. This isolates the console, cable, switch, scaler and television instead of treating the entire cabinet as one mystery.
Purchase checklist
- List every console, region and hardware modification
- Identify the best practical output for each system
- Select a scaler that accepts all required analog formats
- Confirm handling of the resolutions and scan types your consoles produce
- Choose switches that pass the required signals without conversion
- Check sync requirements for RGB equipment
- Count inputs and reserve at least one spare port where practical
- Confirm mono or stereo audio routing from source to HDMI or speakers
- Keep native HDMI systems outside the analog chain
- Check current manuals and firmware notes before purchasing
- Confirm that the retailer’s return policy allows compatibility testing with your TV
Build the smallest signal chain that fits the collection
The right setup is not the one with the most converters or the most expensive switch. It is the shortest dependable chain that preserves each console’s useful output while remaining easy to operate.
Start by inventorying the consoles and grouping them into composite, S-Video, RGB, component and HDMI families. Choose the analog scaler next, add compatible switches ahead of it, and test one branch at a time. That produces a system you can troubleshoot, expand and actually use instead of a cable cabinet that only its builder understands.