Overview

The WiiM Amp, WiiM Amp Pro, and WiiM Amp Ultra feature Sub Out, allowing you to connect an active subwoofer for a 2.1 setup. For the best listening experience, proper synchronization between the subwoofer and the main speakers is essential.

To simplify this process, these WiiM devices now support the Subwoofer & Speaker Sync feature, making it easier to seamlessly align your subwoofer with the main speakers.

Understanding Subwoofer Delay

If your subwoofer performs digital signal processing (DSP), it most likely imposes a delay. Unfortunately, this delay cannot be reduced. To compensate, you can add a delay to the main speakers using the WiiM Home App.

If your subwoofer does not impose a noticeable delay but is placed farther from your main listening position than your main speakers, you should apply a delay value for your main speakers.

Adjust Subwoofer & Speaker Latency

Go to the Device tab > Device Settings > Sub Out >Subwoofer & Speaker Sync in the WiiM Home app.

Then, choose Automatic Sync or Manual Sync to align your subwoofer and main speakers.

Automatic Sync Instructions

Best for: Most users seeking a quick, hassle-free setup.

How it works: Uses your phone's microphone to measure latency automatically.

  1. Select Start Automatic Sync.
  2. Prepare the Environment
    • Ensure the room is quiet
    • Rotate phone 180° (microphone pointing toward speakers)
    • Hold it at ear height.
    • Sit in the sweet spot.
  3. Audio Check: Tap Play Sound to ensure it's clearly audible.
  4. Start Measurement: Tap Start Measurement. Test tones will play from both speakers and subwoofer.
  5. Complete Sync: When "Sync Complete" appears, tap Done to apply the results.
ℹ️ Note:
  • If you want to adjust latency further after auto-adjustment, you can follow the Manual Sync Instructions below.
Manual Sync Instructions

Best for: Audiophiles who prefer fine-tuning or noisy environments.

How it works: Allows manual adjustment to set the exact delay in milliseconds.

  1. Select Manual Delay Adjustment.
  2. Select Device: Choose the Subwoofer or Main Speakers tab.
  3. Adjust Latency: Use the slider or +/- buttons to set the delay (0 ms to 200 ms).
★ Tip:
  • If the subwoofer is too fast, increase its latency.
  • If the main speakers are too fast, increase their latency.