TABLE OF CONTENTS

Overview

This tutorial will walk you through the steps to adjust sub output latency, ensuring perfect synchronization between your subwoofer and main speakers.

The WiiM Amp, WiiM Amp Pro, WiiM Amp Ultra, and WiiM Ultra feature Sub Out, allowing you to connect both your main speakers and subwoofer. To optimize your audio experience, ensure that your subwoofer is perfectly synchronized with your 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 the subwoofer.

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.