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# Installation Guide (NAS-sourced)

Real installation content found in NAS manuals this pass, organized by category. Supplements (does not replace) `` and `` , which were built from local .

## Amplifier (FC-1, FH-4, FS-1, FM-1)

Real Packing List confirmed for FC-1: FC-1 Amplifier, User Manual (EN+CN), 20A Fuse x2, PH 5pin Cable, Self Tapping Cross Screws x4. FM-1: negative ground 12V DC operation only; protection circuit on overheat/short; never use higher-amperage fuse.

## Speaker (FAK-165) -- first real Speaker installation content in this project

FAK-165 is a 2-way component kit: Amplifier Left/Right Channel Output wires into a **passive Crossover unit**, which then splits to the Woofer (+/-) and Tweeter (+/-). Real mounting dimensions: Woofer 159mm cutout diameter, 167mm width, 71mm mounting depth, 144x84mm bolt pattern; Tweeter 52mm face, 46.5x18x26mm body depth.

## Subwoofer (FED-1000) -- active subwoofer wiring differs from passive

FED-1000 has both High Level and Low Level inputs (0.9V / 300mV sensitivity respectively), an onboard Low Pass Filter (50-150Hz) and Bass Boost (0 to +12dB) control, and its own 25A fuse -- wire it like a powered amplifier, not a passive speaker.

## Electronic/Accessory (FCC-90A)

Digital Power Capacitor -- install as close as possible to the amplifier for maximum performance, but isolated from amplifier heat. REM (ON/OFF) terminal connects to the car radio's automatic antenna connector (0.5mm² cable) for auto on/off switching.

## Firmware upgrade (FP-8V5/FP-10V5, FP-8A/FP-12AD) -- see

USB-based, no PC required: copy update.ufw to a USB drive, plug into the DSP's U-DISK port while powered on, wait for 6 "Dong" tones confirming success.