Audio Fix / setup help
JBL Bar 500MK2 / Bose Smart Ultra / Polk MagniFi Max AX SR: remove a confirmed TV-speaker echo on an already working soundbar path
The same programme audibly plays from TV speakers and the connected soundbar; the exact TV has a documented bar-only destination.
Manufacturer-documented Reviewed 2026-11-09 · Revision 1
Follow these checks in Audio Fix →When this guide applies
JBL Bar 500MK2 / Bose Smart Ultra / Polk MagniFi Max AX SR. The same programme audibly plays from TV speakers and the connected soundbar; the exact TV has a documented bar-only destination.
Connection scope: HDMI / ARC / eARC audio · Optical digital 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
Is the same programme audibly playing from both the TV internal speakers and the soundbar?
Crackling, protection or a soundbar that never plays is not this duplicate-output echo.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Does the exact TV manual document disabling its speakers while retaining the current wired external-audio destination?
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented JBL Bar 500MK2 official manual ↗PDF pages 20 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Bose Smart Ultra Soundbar official manual ↗PDF pages 52, 62 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Polk MagniFi Max AX SR official manual ↗PDF pages 34 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
step-1
Does the exact TV manual document disabling its speakers while retaining the current wired external-audio destination?
Do not borrow a Samsung/LG/other television menu or assume that mute leaves the external output unchanged.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Is that existing soundbar path already stable at a comfortable level?
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented JBL Bar 500MK2 official manual ↗PDF pages 20 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Bose Smart Ultra Soundbar official manual ↗PDF pages 52, 62 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Polk MagniFi Max AX SR official manual ↗PDF pages 34 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
step-2
Is that existing soundbar path already stable at a comfortable level?
This flow does not establish a new ARC/eARC/optical connection.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Do you want only the soundbar to reproduce this programme?
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented JBL Bar 500MK2 official manual ↗PDF pages 20 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Bose Smart Ultra Soundbar official manual ↗PDF pages 52, 62 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Polk MagniFi Max AX SR official manual ↗PDF pages 34 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
step-3
Do you want only the soundbar to reproduce this programme?
Intentional dual-output features are a preference; retain the TV previous setting.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Use the exact TV documented control to disable its internal speakers while retaining that external destination
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented JBL Bar 500MK2 official manual ↗PDF pages 20 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Bose Smart Ultra Soundbar official manual ↗PDF pages 52, 62 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Polk MagniFi Max AX SR official manual ↗PDF pages 34 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
step-4
Use the exact TV documented control to disable its internal speakers while retaining that external destination
No universal menu name is assumed. Leave soundbar source, source format and cables unchanged.
Look for: Perform only the stated operation, then confirm it was possible.
- If I completed this → Does the same programme now play from the soundbar without the duplicate-TV echo?
- If I could not do this → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented JBL Bar 500MK2 official manual ↗PDF pages 20 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Bose Smart Ultra Soundbar official manual ↗PDF pages 52, 62 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Polk MagniFi Max AX SR official manual ↗PDF pages 34 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
step-5
Does the same programme now play from the soundbar without the duplicate-TV echo?
This observation does not diagnose electrical distortion or prove a measured timing result.
Look for: Confirm the actual prerequisite or observation. Stop safely if unknown.
- If Yes, confirmed → Checks completed — report the actual result
- If No → Stop at the unconfirmed condition
- If I do not know / cannot check → A required fact is unknown
- Manufacturer-documented JBL Bar 500MK2 official manual ↗PDF pages 20 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Bose Smart Ultra Soundbar official manual ↗PDF pages 52, 62 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
- Manufacturer-documented Polk MagniFi Max AX SR official manual ↗PDF pages 34 — For echo/distorted simultaneous TV playback, the manufacturer directs disabling the TV internal speakers using the actual TV instructions.Already working wired soundbar path; no format, input assignment, CEC or cable change. · Source checked 2026-11-09
Possible result
Checks completed — report the actual result
Completion does not automatically mean the problem is solved. Report what actually happened; no 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 at the unconfirmed condition
A required setup or response was not confirmed. Retain the actual observation and consult the exact source/partner manual 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, connection, partner capability and state before continuing. Do not guess a menu, interrupt an installation or modify a live source by trial and error.
insufficient data
Reaching this result does not mean the issue is solved. Only your own feedback can report improvement.