Indicates how "easily" the microphone transmits its signal to the equipment (mixer, sound card, amplifier). It is expressed in Ohms (Ω).

• Low impedance (≤ 600 Ω): Stable signal, less noise, ideal for professional equipment and long cable runs.
• Medium impedance (600 – 1,000 Ω): Good balance, common in live and general use.
• High impedance (> 1,000 Ω): More sensitive to loss and noise, usually found in older or specialized equipment.

Max SPL (Maximum Sound Pressure Level) is the maximum sound pressure level (in dB) that a microphone can withstand before it starts to distort the sound.

• High Max SPL (e.g., 140-160dB): Ideal for recording loud sources such as drums, amplified guitar, or live concerts.
• Lower Max SPL (e.g., 120dB): Suitable for vocals and softer recordings.

The higher the Max SPL, the louder the sounds it can capture without distortion.