WiiM Amp, WiiM Amp Pro, WiiM Amp Ultra, and WiiM Ultra feature a Sub Out port for connecting a subwoofer. WiiM also provides a variety of Sub Out settings for you fine-tune bass performance for the best listening experience.

This article explains what each Sub Out setting does.

Level

Modify the output level to increase or decrease the bass to your preference.

Crossover Frequency

This setting controls the upper limit of the frequencies your subwoofer will handle. You can fine-tune this setting to ensure a smooth transition between your subwoofer and the main speakers.

For smaller speakers, a higher crossover can enhance the bass. Conversely, larger speakers may require a lower crossover to manage mid-bass frequencies, leaving only the low frequencies for the subwoofer.

Phase

If the bass seems out of sync with your main speakers, tweak the phase setting. This can help synchronize the sound between your subwoofer and speakers.

Subwoofer Calibration (WiiM Ultra)

This setting aligns the time delay and level between your subwoofer and main speakers based on the measurement at the listening position, ensuring a synchronized and balanced sound experience.

For more details, see Subwoofer Calibration: One-Tap Sync between Main Speakers and Subwoofer.

Subwoofer & Speaker Sync (WiiM Amp/Amp Pro/Amp Ultra)

This setting aligns the time delay between your subwoofer and main speakers based on the measurement at the listening position, ensuring a synchronized and balanced sound experience.

For more details, see Tutorial: Syncing Your Subwoofer with Main Speakers.

Subwoofer Bypass Mode

This setting sends full-range frequency audio to the subwoofer, providing deeper and richer bass.

Main Speakers Output Bass

This setting sends full-range frequency audio to the main speakers, ensuring that all frequency ranges are well represented and enhancing the overall fullness of your music.

For more details on the Subwoofer Bypass Mode and Main Speakers Output Bass settings, see Subwoofer Advanced Options: Subwoofer Bypass Mode & Main Speakers Output Bass.

Crossover Setting Impact: Setting a crossover frequency would result in the speakers receiving a high passed signal (i.e., from CF freq to 20kHz).

Subwoofer Output: If you're using a subwoofer with the WiiM Ultra, please ensure the subwoofer handles frequencies below the crossover point.