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Marantz MODEL M1 and Denon Home 350: Select an already installed HEOS analogue source

Marantz MODEL M1 and Denon Home 350: Select an already installed HEOS analogue source. Shared exact-model procedure, with model-specific prerequisites retained.

Manufacturer-documented Reviewed 2026-11-09 · Revision 2

Follow these checks in Audio Fix →

When this guide applies

Exact M1 RCA analogue line input or Home350 3.5mm AUX IN, already correctly connected to a known line-level source playing at a safe low level. Select the correct existing HEOS room/input; no cartridge phono input assumption, wiring or group changes.

Connection scope: Analog line / headphone audio. Symptom: There is no playback sound.

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

Is the source already correctly attached to the selected M1 RCA analogue line input or Home350 3.5mm AUX IN, playing at a safe low level, while HEOS is controlling another source or room?

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented Marantz MODEL M1 official Owner’s Manual ↗PDF pages 24: Playing an external device — For installed external sources, HEOS Home > Sources > Inputs selects the unit and physical input. Start playback on that source. MODEL M1 analog RCA is a line input, not a raw phono stage.Exact MODEL M1, not another Marantz amplifier’s remote or Bluetooth transmitter. · Source checked 2026-11-09
  • Manufacturer-documented Denon Home 350 EU Owner’s Manual ↗Selecting a room p18; Playing music from AUX p33 — Select the intended room, then Inputs in HEOS for an already attached 3.5 mm AUX source. Begin with source level medium-low; excessive input level can distort.Exact Home 350 EU, existing external analogue source and cable already installed correctly. · Source checked 2026-11-09

a1

Select the exact HEOS room

In HEOS Rooms select the exact M1 or Home350 that physically receives this already installed cable. Leave other rooms and groups untouched.

Look for: Perform this one check and observe the actual response.

  • Manufacturer-documented Marantz MODEL M1 official Owner’s Manual ↗PDF pages 24: Playing an external device — For installed external sources, HEOS Home > Sources > Inputs selects the unit and physical input. Start playback on that source. MODEL M1 analog RCA is a line input, not a raw phono stage.Exact MODEL M1, not another Marantz amplifier’s remote or Bluetooth transmitter. · Source checked 2026-11-09
  • Manufacturer-documented Denon Home 350 EU Owner’s Manual ↗Selecting a room p18; Playing music from AUX p33 — Select the intended room, then Inputs in HEOS for an already attached 3.5 mm AUX source. Begin with source level medium-low; excessive input level can distort.Exact Home 350 EU, existing external analogue source and cable already installed correctly. · Source checked 2026-11-09

a2

Select its installed input

Use the matching installed HEOS source page: for M1, Home > Sources > Inputs; for Home350, Inputs under Music. Choose this player’s actual analogue/AUX input. Stop if hidden, ambiguous or the actual menu does not match.

Look for: Perform this one check and observe the actual response.

  • Manufacturer-documented Marantz MODEL M1 official Owner’s Manual ↗PDF pages 24: Playing an external device — For installed external sources, HEOS Home > Sources > Inputs selects the unit and physical input. Start playback on that source. MODEL M1 analog RCA is a line input, not a raw phono stage.Exact MODEL M1, not another Marantz amplifier’s remote or Bluetooth transmitter. · Source checked 2026-11-09
  • Manufacturer-documented Denon Home 350 EU Owner’s Manual ↗Selecting a room p18; Playing music from AUX p33 — Select the intended room, then Inputs in HEOS for an already attached 3.5 mm AUX source. Begin with source level medium-low; excessive input level can distort.Exact Home 350 EU, existing external analogue source and cable already installed correctly. · Source checked 2026-11-09

result

Check the actual result

Is the existing analogue programme now heard from the intended M1 or Home350 at the safe level?

Look for: Choose only a detail you can confirm.

  • Manufacturer-documented Marantz MODEL M1 official Owner’s Manual ↗PDF pages 24: Playing an external device — For installed external sources, HEOS Home > Sources > Inputs selects the unit and physical input. Start playback on that source. MODEL M1 analog RCA is a line input, not a raw phono stage.Exact MODEL M1, not another Marantz amplifier’s remote or Bluetooth transmitter. · Source checked 2026-11-09
  • Manufacturer-documented Denon Home 350 EU Owner’s Manual ↗Selecting a room p18; Playing music from AUX p33 — Select the intended room, then Inputs in HEOS for an already attached 3.5 mm AUX source. Begin with source level medium-low; excessive input level can distort.Exact Home 350 EU, existing external analogue source and cable already installed correctly. · Source checked 2026-11-09

Possible result

Confirm the unknown detail before proceeding

Stop rather than infer an installed cartridge, partner, source level, cable capability, software version or control state.

insufficient data

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

    Possible result

    Keep the actual observation for support

    Record the exact model, source, connection, control state and response. These checks do not diagnose a failed component or prescribe a reset, update, internal repair or mains change.

    next support

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

      Possible result

      Keep the observed result

      This is the outcome observed in this setup, not a guaranteed cure, Audio Review physical test or measurement.

      steps completed

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

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