Audio Fix / setup help

NAD C 389 / NAD C 399: pair a phone with the chassis Bluetooth receiver

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.

Manufacturer-documented Reviewed 2026-11-10 · Revision 1

Follow these checks in Audio Fix →

When this guide applies

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.

Connection scope: Bluetooth. Symptom: My devices won’t pair or reconnect.

This is a documented check, not a diagnosis of your equipment. The model name does not confirm the selected input, mode, software or connected partner.

If your exact model or a required setting is unknown, use the “I don’t know” branch below. Do not apply a similarly named model’s instructions.

Checks and possible outcomes

Start at scope. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.

scope

Confirm the exact setup

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.

Look for: Continue only when all stated prerequisites are known.

  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10
  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10

a1

Choose the receiving role

In Settings read Bluetooth Mode and choose Sink for incoming phone music. This differs from Source, which sends amplifier audio to another device. Do not apply this chassis route when MDC2 BluOS-D is installed.

Look for: Sink is the intended available mode.

  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10
  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10

a2

Connect from the phone

Open the phone’s Bluetooth device list and select this amplifier’s own identity. The manuals use C389BT/C399BT as examples; confirm the actual unit instead of selecting a neighbour’s device.

Look for: The amplifier displays the connected source identity.

  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10
  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10

a3

Compare a familiar track quietly

Start ordinary phone playback and observe sound at the already checked low amplifier level. Preserve the actual result without clearing all saved pairings.

Look for: Observe the incoming phone music on the intended system.

  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10
  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10

result

Check the actual result

Is the intended phone connected to this amplifier in Sink mode and playing quietly?

Look for: A changed setting is not proof of a physical repair.

  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10
  • Manufacturer-documented NAD C 389 / NAD C 399 — original manufacturer instructions ↗C 389/C 399 owner manuals p.16, Bluetooth Mode and Sink — Without MDC2 BluOS-D, Bluetooth Mode selects receiving (Sink) or transmitting (Source). Pairing a phone uses Sink; a connected source identity is shown on the amplifier.Only NAD C 389 / NAD C 399 and the stated connection role. Unknown hardware options, partner compatibility or menu state must stop. · Source checked 2026-11-10

Possible result

Checks completed — report the actual outcome

The stated observation was confirmed. Completion is not automatically Solved, an Audio Review physical test or a hardware diagnosis.

steps completed

Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

    Possible result

    Keep the observation for support

    Record the model, connection role and last visible result. Do not reset equipment, open its case, defeat protective limits or install an update to compensate for an unknown state.

    next support

    Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

      Possible result

      Confirm the unknown detail first

      An unknown detail is not a diagnosis. Check the exact manufacturer instructions before continuing.

      insufficient data

      Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.

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