Which term describes the standard level for analog audio output from consumer electronics?

Which term describes the standard level for analog audio output from consumer electronics?

• A. Microphone level
• B. Line level
• C. Speaker level
• D. Headphone level

Answer: (B)

Line level is the standard analog audio output level used between consumer electronics. It’s higher than microphone level, which is too weak to travel cleanly between devices, and lower than speaker level, which is a high-power signal meant to drive speakers. Line level is the normal signal a CD player, audio interface, or DAC sends to an amplifier or receiver, so the next device can accommodate it without distortion or excessive noise. In practical terms, consumer line level is around 0.316 V RMS (roughly −10 dBV), with professional gear aiming for about 1.23 V RMS (+4 dBu). This level strikes a balance: it travels well through cables without too much loss or noise, yet isn’t so strong that it would require heavy attenuation or risk distortion in subsequent stages. Headphone outputs and microphone inputs serve different purposes and aren’t standardized the same way, reinforcing why line level is the described standard for analog audio output between consumer devices.

Line level is the standard analog audio output level used between consumer electronics. It’s higher than microphone level, which is too weak to travel cleanly between devices, and lower than speaker level, which is a high-power signal meant to drive speakers. Line level is the normal signal a CD player, audio interface, or DAC sends to an amplifier or receiver, so the next device can accommodate it without distortion or excessive noise. In practical terms, consumer line level is around 0.316 V RMS (roughly −10 dBV), with professional gear aiming for about 1.23 V RMS (+4 dBu). This level strikes a balance: it travels well through cables without too much loss or noise, yet isn’t so strong that it would require heavy attenuation or risk distortion in subsequent stages. Headphone outputs and microphone inputs serve different purposes and aren’t standardized the same way, reinforcing why line level is the described standard for analog audio output between consumer devices.