Understanding Speaker Hiss

Speakers hissing when not playing audio can be attributed to several factors, not just a single cause. Here's a breakdown of the key contributors to this issue:

Common Sources of Speaker Hiss

1. Amplifiers:

   • Many amplifiers amplify not just audio but also electrical noise.
   • Cheap amplifiers often add their own noise, particularly noticeable when the volume is up and nothing is playing.
   • Solution: Investing in a better quality, low-noise amplifier, or using good active speakers or separate amps with passive speakers can help reduce hiss.

2. Ground Loop:

   • Occurs when two devices are plugged into separate outlets and connected with a cable, e.g., a computer and speakers.
   • This creates a loop that can carry unwanted electricity, causing hums.
   • Solution: Use a power strip to connect all devices to the same outlet to minimize ground loops.

3. Radio Frequency Interference:

   • Poorly shielded audio products can pick up RF interference, such as from Bluetooth devices or dimmer switches.
   • Solution: Identify problematic equipment through trial and error or use RF filtering products.

Media Noise

• Analog Media:
  • Vinyl records and cassette tapes are naturally prone to hiss and crackling due to their physical nature.
  • Solution: Use quality equipment and maintain it well, or use post-processing solutions to clean up the sound.

Digital Solutions

• External DACs and Amps:
  • For reducing electrical noise from source devices like computers, consider using external digital-to-analog converters (DACs) and amplifiers.

Additional Resources

• Explore solutions for unwanted hissing and noise further by checking additional resources or videos on exterior DACs and amps for minimizing interference.

This guide provides insight into common issues and solutions, aiding in the reduction of unwanted speaker hissing.