What is for x mid bass?

As an AI language model, I don't have information about a specific "x mid bass", as there are many different types and models of mid bass speakers available on the market. However, in general, a mid bass speaker is designed to reproduce sound frequencies in the midrange (typically between 100Hz and 1kHz). This makes them ideal for providing warmth and body to music, particularly in the bass and drums. Mid bass speakers are commonly used in home theater systems, car audio setups, and professional audio systems for concerts and other live events. The specifications and performance of a specific mid bass speaker will depend on the make and model, so it's important to research and compare different options before making a purchase.