Audio Fix
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Documented checks for headphones, speakers, receivers, amplifiers, DACs, interfaces and turntables. Choose the exact model, symptom and connection. Free to use. No account required.
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Scope and coverage
Choose your exact model to see current coverage. The library currently contains 2700 guides for 327 exact reviewed models. Other reviewed models remain searchable and receive an honest “no matching guide” result when no procedure applies.
The checks use manufacturer or platform documentation. Separately labelled owner reports help us choose useful checks and explain real-world uncertainties; they do not prove a cause or a cure. These procedures are not our physical tests, even where a linked review is hands-on. If a required menu, version or condition is unknown, follow the unknown branch.
Manufacturer-documented
Pair a phone with the chassis Bluetooth receiver. Exact NAD C 389 or C 399 without an installed MDC2 BluOS-D module. The supplied Bluetooth antenna is already fitted, the owner wants phone-to-amplifier playback and levels are low.
Read the guide →Manufacturer-documented
recognise Temporary Display rather than a power failure. C 389 or C 399 continues playing normally after the display and power LED go dark, with no warning or installation in progress.
Read the guide →Manufacturer-documented
release a confirmed Mute state at a safe volume. Exact NAD C 389 or C 399, normal operation with the intended input already selected and Mute explicitly shown. No protection warning or unknown fixed-volume cinema chain.
Read the guide →Manufacturer-documented
restore a deliberately disabled speaker output. The owner confirms a correct, already installed speaker pair on C 389 or C 399, Speaker is Off, and the volume is low. No protection fault, wiring uncertainty or headphone-only intention.
Read the guide →Manufacturer-documented
Reveal Bass and Treble hidden by Tone Control Off. Exact C 389 or C 399 with otherwise working playback. Bass/Treble controls are absent and the owner agrees to enable tone processing while preserving the current values and a low listening level.
Read the guide →Manufacturer-documented
Send a known amplifier input to Bluetooth headphones. Exact C 389 or C 399 without MDC2 BluOS-D, a fitted antenna and known Bluetooth headphones ready for pairing. The owner accepts changing the Bluetooth role; headphone level is low before connection.
Read the guide →Manufacturer-documented
Cancel an unintended sleep countdown that fades playback. Follow the exact documented checks and retain the observation.
Read the guide →Manufacturer-documented
NAD C 700 V2 — Check an encoded TV output on the HDMI eARC input. Follow the exact documented route and keep the actual result.
Read the guide →Manufacturer-documented
NAD C 700 V2 — Check whether a configured volume ceiling is being reached. Follow the exact documented route and keep the actual result.
Read the guide →Manufacturer-documented
Read the installed iOS Controller version against documented initial C 700 V2 support. No software installation.
Read the guide →Manufacturer-documented
Compare a newly unwanted tone boost with the prior bypassed state. Follow the exact documented checks and retain the observation.
Read the guide →Manufacturer-documented
NAD C 700 V2 — Compare one added delay when video audio is early. Follow the exact documented route and keep the actual result.
Read the guide →Manufacturer-documented
NAD C 700 V2 — Enable an already installed subwoofer route from a known disabled state. Follow the exact documented route and keep the actual result.
Read the guide →Manufacturer-documented
Use this exact amplifier front menu for a read-only current IP Address observation.
Read the guide →Manufacturer-documented
NAD C 700 V2 — Restore visibility of a known hidden input. Follow the exact documented route and keep the actual result.
Read the guide →Manufacturer-documented
NAD C 700 V2 — Select an already connected source from the front menu. Follow the exact documented route and keep the actual result.
Read the guide →Manufacturer-documented
NAD C 700 V2 — Teach a chosen IR handset button to reduce volume. Follow the exact documented route and keep the actual result.
Read the guide →Manufacturer-documented
NAD C 700 V2 — Wake a confirmed vacation-mode unit without a reset. Follow the exact documented route and keep the actual result.
Read the guide →Manufacturer-documented
adjust grouped-source lip sync only in the correct direction. Exact M10 V3 distributes a known video source to grouped BluOS players. Sound arrives early, the input is identified and its A/V Mode control is available. Late or uncertain audio must not be given more delay.
Read the guide →Manufacturer-documented
check the TV-return role and PCM requirement. Exact NAD M10 V3 receives a TV’s ARC/eARC audio. Both HDMI roles are known, audio level is low and no speaker protection indication is present.
Read the guide →Manufacturer-documented
complete an intended first wired BluOS setup. Exact M10 V3 is genuinely unconfigured, an authorised DHCP home router and official BluOS app are available, and the owner explicitly accepts that initial configuration checks and may automatically install firmware. Do not begin if that consequence is not accepted.
Read the guide →Manufacturer-documented
distinguish USB storage from a computer USB-DAC input. Exact M10 V3 and the external port label are identified. The question concerns a computer USB-audio connection, not playback from a USB flash drive.
Read the guide →Manufacturer-documented
match an MM turntable’s output to Phono or Line. Exact M10 V3 and a turntable’s cartridge/output mode are positively known from its own instructions. Pause playback, reduce volume and power off associated equipment before changing RCA connections.
Read the guide →Manufacturer-documented
wake a player that is deliberately in Vacation mode. Exact M10 V3 was previously configured in BluOS and is now confirmed in Vacation mode with solid amber NAD logo. This does not cover an update, red fault indication or unknown network setup.
Read the guide →Audio Fix follows structured steps with sources attached to each claim. Forum experiences are labelled User-reported and kept separate from the evidence supporting an instruction. Unknown details remain unknown. Finishing the steps is separate from reporting that a problem is solved. A changed or withdrawn guide cannot silently resume an old procedure.
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