Which is better for movies?

The LG S90TR. Its rear speakers and subwoofer create real surround, and it supports DTS:X as well as Dolby Atmos. The Arc is a 5.0.2 bar, so effects stay up front.

Do I need a subwoofer with the Sonos Arc?

Not required, but the Arc has no separate sub, so deep bass is limited. Sonos sells a Sub you can add, which raises the total cost.

Which has better bass?

The LG S90TR, because it includes a dedicated 8-inch wireless subwoofer. The Arc relies on built-in woofers.

Does the Sonos Arc support DTS?

No. It handles Dolby Atmos but not DTS or DTS:X. The LG S90TR supports both.

Which is easier to set up?

The Sonos Arc, since it is one bar with no rear speakers or subwoofer to place. The LG needs outlets for the sub and both rear speakers.

Is the LG S90TR worth it over the Arc?

If you want full surround and DTS:X, yes. The LG has ranged from $779.99 to $799.99 since October 30, 2026; compare that to the Arc's live price before buying.

LG S90TR Soundbar vs Sonos Arc

Buy the LG S90TR if you want a full 7.1.3 system with wireless rear speakers and a big subwoofer for movie immersion. Buy the Sonos Arc if you want a simpler one-piece bar with built-in Alexa and Google Assistant and a cleaner wall-mounted look. The LG has ranged from $779.99 to $799.99 since October 30, 2026; no current price was given for the Arc here, so check its live price before deciding.

Ask our shopping agent

It checks today's price at every store, compares the alternatives and answers in about a minute.