Audio Fix / setup help

Arcam AVR31: give a verified analogue source the correct ADC input range

Arcam AVR31 — give a verified analogue source the correct ADC input range. Confirm the actual setup and observed response before reporting an outcome.

Manufacturer-documented Reviewed 2026-11-09 · Revision 1

Follow these checks in Audio Fix →

When this guide applies

Known high-level line source, incorrect low input range, no unknown voltage or cartridge source.

Connection scope: Analog line / headphone audio. Symptom: Playback sounds distorted.

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 step-0. Follow the link that matches what you actually observe. Alternative branches are not a single sequence of actions.

step-0

Does the source documentation confirm maximum output above the current trim but no greater than 4 Vrms?

Unknown source voltage or a raw cartridge signal stops here.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented Arcam AVR31 official manual ↗PDF pages 33 — Input Trim selects the maximum analogue input level before the ADC path clips:1, 2 or 4 volts RMS. It is an input-sensitivity control, separate from monitor loudness.Documented line-level source exceeds the current ADC input trim but not 4 Vrms; processed analogue path, not Stereo Direct. · Source checked 2026-11-09

step-1

Is the intended processed analogue input selected with Stereo Direct off?

A digital source or bypassed processing path is a different issue.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented Arcam AVR31 official manual ↗PDF pages 33 — Input Trim selects the maximum analogue input level before the ADC path clips:1, 2 or 4 volts RMS. It is an input-sensitivity control, separate from monitor loudness.Documented line-level source exceeds the current ADC input trim but not 4 Vrms; processed analogue path, not Stereo Direct. · Source checked 2026-11-09

step-2

Is Input Trim currently 1 or 2 Vrms, with distortion on loud passages?

Do not lower a known-correct 4 Vrms range or infer input overload merely from speaker loudness.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented Arcam AVR31 official manual ↗PDF pages 33 — Input Trim selects the maximum analogue input level before the ADC path clips:1, 2 or 4 volts RMS. It is an input-sensitivity control, separate from monitor loudness.Documented line-level source exceeds the current ADC input trim but not 4 Vrms; processed analogue path, not Stereo Direct. · Source checked 2026-11-09

step-3

May this input sensitivity change with playback stopped and listening levels low?

Retain the previous range; the reproduced level may change.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented Arcam AVR31 official manual ↗PDF pages 33 — Input Trim selects the maximum analogue input level before the ADC path clips:1, 2 or 4 volts RMS. It is an input-sensitivity control, separate from monitor loudness.Documented line-level source exceeds the current ADC input trim but not 4 Vrms; processed analogue path, not Stereo Direct. · Source checked 2026-11-09

step-4

Set only this input Input Trim to 4 Vrms

Do not raise source output or disable a maximum-volume safety setting.

Look for: Perform only the stated operation and confirm whether it was possible.

  • Manufacturer-documented Arcam AVR31 official manual ↗PDF pages 33 — Input Trim selects the maximum analogue input level before the ADC path clips:1, 2 or 4 volts RMS. It is an input-sensitivity control, separate from monitor loudness.Documented line-level source exceeds the current ADC input trim but not 4 Vrms; processed analogue path, not Stereo Direct. · Source checked 2026-11-09

step-5

Does the same loud passage reproduce without the previous input distortion?

A different range is not a measured distortion result or proof of a damaged component.

Look for: Confirm the stated setup or observation. Unknown stops safely.

  • Manufacturer-documented Arcam AVR31 official manual ↗PDF pages 33 — Input Trim selects the maximum analogue input level before the ADC path clips:1, 2 or 4 volts RMS. It is an input-sensitivity control, separate from monitor loudness.Documented line-level source exceeds the current ADC input trim but not 4 Vrms; processed analogue path, not Stereo Direct. · Source checked 2026-11-09

Possible result

Checks completed — report what happened

Completion is not an automatic solved result. Report your actual outcome; no Audio Review physical test or measured repair is claimed.

steps completed

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

    Possible result

    Stop and retain the actual observations

    A required fact or response was not confirmed. Consult the exact product/partner documentation or official support. Do not escalate to a reset, update installation, internal repair or unsafe wiring change.

    next support

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

      Possible result

      A required fact is unknown

      Confirm the actual model, source, partner capability and current state before continuing. Do not guess a menu or interrupt a live session/update.

      insufficient data

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

        All Audio Fix guides → · TV & Audio Finder →

        Scroll to Top