Selecting the right monitor is crucial for an authentic and enjoyable arcade machine experience. The choice impacts everything from visual fidelity to gameplay feel. The most important factors to consider are the display technology, response time and input lag, aspect ratio and resolution, connectivity and compatibility, and overall durability.

Firstly, you must decide between a classic CRT (Cathode Ray Tube) monitor or a modern LCD (Liquid Crystal Display). CRT monitors are the original choice for classic arcade cabinets and are prized for their perfect black levels, vibrant colors, and authentic scanline effect. They offer a true retro experience but can be heavy, require more maintenance, and are difficult to source. Modern LCDs are lighter, more energy-efficient, and readily available. However, to avoid a poor experience, you must seek out models specifically designed for gaming with high refresh rates and low response times to minimize motion blur.

This leads directly to the next critical factor: response time and input lag. For fast-paced arcade games, a slow response time can create noticeable motion blur, making gameplay difficult. Input lag, the delay between your control input and the action on screen, is even more critical. High input lag can make games feel unresponsive and sluggish. Look for a monitor with a response time of 5ms or lower and ensure it has a dedicated "Game Mode" to minimize processing-induced input lag.

The aspect ratio and native resolution are also key. Classic arcade games were designed for the 4:3 aspect ratio. Using a modern widescreen (16:9) monitor will result in stretched visuals or black bars on the sides. For authenticity, a 4:3 monitor is ideal. If using an LCD, its native resolution should match the output of your game system to avoid scaling, which can introduce lag and blurry graphics.

Furthermore, ensure the monitor has the correct connectivity. Classic arcade PCBs often use standard VGA or even older CGA/EGA signals with 15kHz frequencies. Many modern LCDs cannot sync with these low-frequency signals. You may require a special scaler or converter, such as an OSSC or GBS-Control, or opt for a modern LCD that supports these signals natively.

Finally, consider the monitor's physical durability and mounting options. Arcade machines are often subject to movement and vibration. The monitor must be securely mounted to withstand this environment. Also, consider the bezel—the frame around the screen—as you may need to customize it to fit your cabinet properly. By carefully weighing these factors—display technology, performance, aspect ratio, connectivity, and build—you can choose a monitor that perfectly preserves the magic and excitement of the arcade era.