ARMNHMR at The Observatory OC in Santa Ana

ARMNHMR takes over The Observatory OC in Santa Ana on Saturday, October 17, for an early-evening bass show that runs from 5pm to 11pm. The flyer bills it as HMRTIME SoCal, and it's one of the more interesting LA EDM events this fall for anyone who likes their drops with a melody attached.

Who's Playing

ARMNHMR is a duo working the emotional end of bass music. Their sets move between future bass, dubstep and trap, and the hook is how much space they leave for big, cinematic chord progressions before the low end hits. If you've caught them at a festival, you know the crowd tends to sing along to the builds as loudly as it reacts to the drops.

Support comes from Emorfik, Usaybflow and Rossy. The flyer pairs Emorfik and Usaybflow as a back-to-back set, which is usually where the looser, more playful moments of a night like this happen. Rossy rounds out the support slots. Show up early. Openers on bass bills like this one often play harder than you'd expect, because they only get an hour.

The Venue

The Observatory sits at 3503 S Harbor Blvd in Santa Ana, a short hop off the 405. It's been a go-to room for Orange County's electronic crowd for years, with an indoor hall and an outdoor festival grounds space next door. The HMRTIME flyer points to the Observatory Festival Grounds, so plan for an open-air show and bring a layer. October evenings in Santa Ana cool off fast once the sun drops.

Practical Info

• When: Saturday, October 17, 2026, 5pm to 11pm
• Where: The Observatory OC, 3503 S Harbor Blvd., Santa Ana 92704
• Ages: 18+, per Insomniac's event listing
• Tickets: Sold through Ticketmaster. Insomniac hadn't posted a price when we checked, so confirm the current tier on the ticket page before you head out.

Getting There

From central LA it's roughly 35 to 40 miles down the 5 or the 405, and Saturday traffic can easily stretch that past an hour. Leave by 3:30pm if you want to catch the first set. Rideshare drop-off works well on Harbor Blvd, and the 11pm finish means you'll beat most of the late-night freeway closures on the way home.

If you're building out a weekend of EDM Los Angeles and Orange County shows, see the rest of our EDM listings or browse more things happening around greater LA. The last song hits at 11, early enough to grab tacos on Harbor before the drive back.