Sony
Sony Ult Tower 9 Party Speaker
$899.99
Sony ULT TOWER 9 Wireless Party Speaker – SRS-ULT900
The Sony ULT TOWER 9 (SRS-ULT900) is a large-format, battery-powered party speaker built for big spaces like gyms, multipurpose rooms, auditoriums, and outdoor events. It delivers 360° Party Sound and Light with an X-Balanced woofer and multi-tweeter layout, plus a dedicated ULT button that toggles two bass modes for either deep low-end feel or punchy, high-impact sound. With mic and guitar inputs and an optical TV connection, it doubles as an event PA, karaoke system, and boosted TV speaker. :contentReference[oaicite:0]{index=0}
At a glance
Connection: Bluetooth wireless + wired inputs
Power: Internal rechargeable battery
Battery life: Up to ~25 hours playback*
Quick charge: ~10 min charge = up to ~3 hours playback
Speaker design: 3-way, multi-driver for 360° coverage
Drivers: 1 × X-Balanced woofer, 2 × midrange, 2 × front tweeters, 2 × rear tweeters
Bass modes: ULT1 (deep low bass) / ULT2 (punchy power bass)
Lighting: 360° multi-color party lights
Bluetooth: Version 5.3
Supported codecs: SBC, AAC, LDAC
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 (phone/tablet power)
App: Sony Sound Connect (10-band EQ, lighting, Party Connect)
Mobility: Built-in handle + castor wheels
Dimensions: approx. 410 × 910 × 456 mm (16.1" × 35.8" × 18.0")
Weight: approx. 28.5 kg (62.8 lb)
*Battery life varies by volume, lighting use, and playback source.
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Key features
360° Party Sound spreads audio evenly across large rooms so everyone hears it clearly.
ULT bass modes switch instantly:
ULT1: deeper, lower-frequency bass for a big low-end “feel.”
ULT2: stronger sound pressure and punchier bass for high-energy events.
X-Balanced Speaker Unit + multi-tweeter array produces powerful bass without muddying vocals.
TV Sound Booster via Optical In delivers a major jump in audio for assemblies or movie nights.
Karaoke & guitar ready with dual 1/4" inputs and easy level control.
360° Party Lights synced to music to energize performances and events.
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Compatibility and setup
Pair wirelessly over Bluetooth for fast setup, or connect devices through the 3.5 mm audio-in. For TVs/projectors, use Optical In (PCM). The rear panel includes two 6.3 mm mic/guitar inputs for karaoke, speeches, or live performance. USB-A supports music playback from a flash drive and can 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
Outdoor events where AC power isn’t guaranteed
Large classrooms, multipurpose rooms, and auditoriums
TV / projector audio boosting for movie nights or presentations
Buyer notes
Battery-powered model: This version is portable with onboard battery. If you want a lower-cost AC-only unit, that’s the SRS-ULT900AC. :contentReference[oaicite:4]{index=4}
Big and heavy: Built for large spaces; wheels and handle make transport easier.
Mics optional: Add compatible wired mics 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.