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Sony · ULT FIELD 1
Sony ULT FIELD 1 (SRS-ULT10) portable wireless Bluetooth 5.3 speaker featuring a dedicated ULT POWER SOUND bass boost button, 83 × 42 mm woofer and 16 mm tweeter with dual passive radiators, IP67 waterproof/dustproof/rustproof and shockproof body, and up to 12 hours of battery life.
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Product story
The Sony ULT FIELD 1 (SRS-ULT10) is a compact, rugged portable Bluetooth 5.3 speaker featuring Sony's ULT POWER SOUND bass boost mode, a true 2-way 83 × 42 mm woofer + 16 mm tweeter acoustic array, dual side passive radiators, and an IP67 waterproof, dustproof, rustproof, and shockproof enclosure with up to 12 hours of battery life.
By pairing a dedicated 16 mm high-frequency dome tweeter with an 83 × 42 mm racetrack woofer and dual side-firing passive radiators, the SRS-ULT10 maintains crisp vocal articulation and treble detail alongside deep low-end extension across the 20 Hz – 20,000 Hz range. Pressing the physical ULT hardware button on the top control strip boosts low frequencies and acoustic pressure for outdoor spaces, while Sony's Sound Diffusion Processor expands sound dispersion around the speaker. Inside the Sony Music Center mobile app, users can also adjust a customizable 3-band equalizer (Bass, Mid, Treble) or link two ULT FIELD 1 units wirelessly via Stereo Pair for discrete left and right stereo channels.
Built for outdoor recreation, travel, and humid monsoon climates, the 650-gram (206 × 77 × 76 mm) chassis is rated IP67 against dust ingress and water immersion up to 1 meter for 30 minutes, treated for saltwater rust resistance, and shock-tested to MIL-STD-810H Method 516.8 standards (surviving 1.22-meter drops onto 5 cm thick plywood). Its cylindrical body is engineered to sit horizontally or stand vertically to save desk or counter space, and includes a detachable multi-way woven strap for hanging from a backpack, tent loop, or handlebar.
Powered by an internal rechargeable lithium-ion battery, the ULT FIELD 1 delivers up to 12 hours of wireless playback and recharges via a sealed USB Type-C (5V/1.5A) port. Connectivity covers Bluetooth 5.3 (SBC and AAC codecs; A2DP, AVRCP, HFP, HSP, and SPP profiles) with Google Fast Pair support on Android smartphones, plus an integrated omnidirectional microphone with Echo Cancelling for clear hands-free phone and video calls.
Before ordering from any seller in the BiponiBD catalog, confirm the exact color finish and manufacturer part code in stock (such as Off-White , Black , Forest Gray, or Orange), verify the included USB-C cable and multi-way strap, and review seller warranty coverage.
Official references: Sony Official ULT FIELD 1 (SRS-ULT10) Specifications.
Helpful answers
Product-specific answers maintained with the catalog information.
Sony manufactures the ULT FIELD 1 (SRS-ULT10) in Black, Off-White, Forest Gray, and Orange with identical acoustic hardware. Buyers should confirm the exact colorway and part code (such as SRSULT10/W for Off-White or SRSULT10/B for Black) with the merchant before ordering.
Yes. In addition to its IP67 waterproof, dustproof, and saltwater-rustproof rating, the ULT FIELD 1 has passed MIL-STD-810H Method 516.8 Shock testing (dropped from 1.22 m onto 5 cm plywood).
Yes. Two ULT FIELD 1 units can be linked wirelessly via Stereo Pair to function as dedicated left and right stereo channels.
Using a 5V 1.5A USB Type-C adapter, the internal battery charges to full capacity for up to 12 hours of standard playback.
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