Sony
Ult Tower 9AC Party Speaker
$749.99
$809.99
Sony ULT TOWER 9AC Party Speaker – SRS-ULT900AC
The Sony ULT TOWER 9AC (SRS-ULT900AC) is a large-format, AC-powered party speaker made for big rooms, gyms, and events. It delivers 360° Party Sound and Light with an X-Balanced woofer and multiple tweeters, plus simple ULT1 / ULT2 bass modes for either deep low-end or punchy, high-impact bass. With mic and guitar inputs and an optical TV connection, it doubles as a karaoke and event PA solution. AC power only (no battery). :contentReference[oaicite:0]{index=0}
At a glance
Connection: Bluetooth wireless + wired inputs
Power: AC only (no internal battery)
Speaker design: 3-way, multi-driver for 360° sound
Drivers: 1 × X-Balanced woofer, 2 × midrange, 2 × front tweeters, 2 × rear tweeters
Bass modes: ULT1 (deeper low bass) / ULT2 (punchy power bass) via dedicated ULT button
Lighting: 360° multi-color party lights
Inputs: 3.5 mm audio-in, Optical (PCM) TV input, USB-A (music playback)
Mic / instrument: 2 × 6.3 mm (1/4") inputs: MIC1 and MIC2/GUITAR
USB out: USB-A device charging (5V / max 1.5A)
EQ: 10-band custom EQ in Sony Sound Connect app
Mobility: Built-in handle + castor wheels
Dimensions: approx. 410 × 910 × 456 mm (16.2" × 35.9" × 18.0")
Weight: approx. 28.5 kg (62.8 lb)
Some specs may vary slightly by region; above aligns to Sony support + major retail spec sheets.
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Key features
360° Party Sound fills large spaces with consistent coverage front to back.
ULT bass modes switch instantly between:
ULT1: deeper, lower-frequency bass for big low-end feel.
ULT2: stronger sound pressure and punchier bass impact.
TV Sound Booster via Optical In turns it into a serious big-room TV speaker.
Karaoke & guitar ready with dual 1/4" inputs and vocal-friendly tuning.
Party lighting system synced to music for events and performances.
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Compatibility and setup
Use Bluetooth for quick wireless pairing, or connect devices via 3.5 mm audio-in. For TVs or projectors, Optical In (PCM) provides a clean direct link. The rear panel includes two 6.3 mm mic/guitar inputs for karaoke, assemblies, or live performance. USB-A supports music playback from flash drives and can also charge a phone during use. :contentReference[oaicite:3]{index=3}
Best use cases
School assemblies, dances, pep rallies, and gym events
Karaoke nights, talent shows, and performing arts programs
Large classrooms, multipurpose rooms, and auditoriums
TV / projector audio boosting for events or media rooms
Buyer notes
AC power only: Designed for venues with outlets; if you need battery operation, look at the non-AC ULT Tower model. :contentReference[oaicite:4]{index=4}
Big + heavy: Wheels and handle help, but this is a large-space speaker (28.5 kg).
Mic not included: Add compatible wired or Sony ULT wireless mics depending on your setup.
Purchasing for schools and districts
Learning Headphones supports purchase orders, tax-exempt checkout, and volume pricing. If you’re building event kits or auditorium/ gym audio setups, our team can help confirm the right ULT speaker + mic package for your space.