| Device | Playability | Quality | Risk | |--------|-------------|---------|------| | Smartphone (direct) | No (line level too low) | N/A | N/A | | Home stereo receiver | Yes (but dangerous) | High | Very high (ground loops) | | Dedicated TENS unit with audio-in (e.g., ElectraStim Flick) | Yes | Medium | Low (current limited) | | DIY StereoStim box (e.g., "Midistim" design) | Yes | High (if built right) | Medium (requires electronics skill) | | E-Stim Systems 2B (with audio link cable) | Yes | Very high | Low (built-in limiters) |
: Every body reacts differently to frequencies. Spend time "calibrating" your device to a specific track before settled in for a full session. electro stim audio files