Technical Glossary

# Technical Glossary

## Terms with real contextual definitions (from )

**REM (Remote Turn-On)** — The unit is turned on by applying +12V to this terminal. Does not carry heavy current — 20 AWG wire is acceptable. _(Source: FX-4 Owner's Manual, Power Connection Leads)_

**ACC mode** — Device power on/off is controlled by the vehicle's ACC voltage. _(Source: FP-8A Owner's Manual, Hardware Interface)_

**HOST mode** — Device turns on via DC signal input from the high-level input, independent of vehicle ACC voltage. _(Source: FP-8A Owner's Manual, Hardware Interface)_

**Bridge Mode** — Combining two amplifier channels into one higher-power output (e.g. FX-4: 440W RMS bridged @4Ω from 2 channels). _(Source: FX-4 Owner's Manual, Product Specifications)_

**AWG (American Wire Gauge)** — Wire thickness standard referenced for power/ground/speaker leads (e.g. #10 AWG minimum for power/ground, #16 AWG for speaker leads). _(Source: FX-4 Owner's Manual, Wiring Instructions)_

**HID-compliant device** — The expected Windows Device Manager entry confirming a DSP unit's USB tuning connection is recognized by the PC. _(Source: FP-8A / FP-12A Owner's Manual, Troubleshooting)_

## Terms observed across the catalog with no local explanatory source

These terms appear in Master Data taglines/descriptions across many SKUs, but no local document in this project explains them in Freude's own words. Definition: PENDING VERIFICATION for each — a textbook definition was deliberately NOT written here, since the task rule is 'không suy đoán' (no speculation) and this pass is scoped to local project data only, not general audio-engineering knowledge.

- Bluetooth
- Class AB
- Class D
- Class-AB
- Class-D
- Crossover
- DSP
- EQ
- OTG
- THD
- USB