Audio
Meyer Sound UP-4slim troubleshooting
The Meyer Sound UP-4slim problems live-event techs bring to Ask Roadie most (also called UP-4slim-WP). Pick your symptom, or describe your own in plain words, and get the likeliest fix first, with the manual page when there is one.
Common UP-4slim errors & problems
What techs run into most, and what's usually behind it. The step-by-step fix for your exact unit is in Ask Roadie.
- Step-by-step fixGet the fix →
How many UP-4slims can I put on one MPS supply channel / how much current does it draw?
Likely cause: Per-box current figures let you load supply channels without sagging the 48 V rail.
- Step-by-step fixGet the fix →
Is there a firmware update for the UP-4slim?
Likely cause: Meyer self-powered loudspeakers ship with fixed factory processing; there is no field-updatable image on the loudspeaker itself.
- Step-by-step fixGet the fix →
LED is solid red but the speaker still plays (at reduced level)
Likely cause: The UP-4slim stores DC and tolerates up to a 30% voltage drop; below ~25 V it flags undervoltage red and output collapses.
- Step-by-step fixGet the fix →
LED is yellow (solid or flashing) during a show
Likely cause: Yellow appears when signal rises ~2 dB above the limiter threshold or on thermal protection; both intentionally reduce gain to protect drivers and amp.
- Step-by-step fixGet the fix →
No audio; on power-up the LED flashes multiple colors or goes solid red and stays that way
Likely cause: A stuck fault indication after the boot self-test means the onboard DSP/amp detected an unrecoverable error rather than a wiring issue.
- Step-by-step fixGet the fix →
Rear LED is solid green — is the speaker OK?
Likely cause: Green indicates all three amp channels nominal, heat sink below 50 C, and signal below the limiter threshold.
- Step-by-step fixGet the fix →
RMS is not showing the UP-4slim / no monitoring data
Likely cause: RMS telemetry is carried by the RMS-equipped power supply, so a non-RMS supply or unaddressed node shows nothing.
- Step-by-step fixGet the fix →
Thin, phasey, or reversed-sounding output between boxes; or worried about wiring damage
Likely cause: IntelligentDC carries 48 V and balanced audio on one connector; swapped DC pins risk hardware damage, swapped audio pins invert polarity and cause cancellation.
- Step-by-step fixGet the fix →
Weak low end or output a couple dB low over a long cable run
Likely cause: IntelligentDC stores DC to ride light-gauge/long runs, but excessive resistance still lowers rail voltage and output.
Not on the list? Describe it your way, or paste the error code off the display. Ask Roadie works the problem with you until it's fixed or you have a clear next move.
How Ask Roadie helps with the UP-4slim
- 1. Pick the Meyer Sound UP-4slim. It's already in the list.
- 2. Describe what you're seeing. In your own words, or the error code off the screen.
- 3. Get the likeliest fix first. Steps in order, the manual page when there is one, and a note when other techs have confirmed it.
- 4. Still broken? Tap 👎 and it keeps going from where you left off.