The Sony SRS-ULT10 is the entry point into Sony's ULT POWER SOUND series, priced at Rs. 9,990 in Mumbai. It is a compact, portable Bluetooth speaker built around a single principle: delivering strong bass output from a small form factor. If you are looking for a reliable, carry-everywhere speaker with punch above its size class, the ULT10 is worth a close look.
Key Specifications
- Driver: Full-range driver with passive radiator
- ULT Button: Hardware bass boost button with two levels
- Bluetooth Version: 5.3 with SBC and AAC codec support
- Battery Life: Up to 16 hours at moderate volume
- Charging: USB-C
- Water and Dust Resistance: IP67 — fully waterproof and dustproof
- Weight: Approximately 680 g
- Dimensions: Compact cylindrical body, easy single-hand grip
- Connectivity: Bluetooth, USB-C (charging and audio)
- App Support: Sony Music Center app for EQ
- Speakerphone: Built-in microphone for calls
Sound Quality — What We Like
The SRS-ULT10 delivers bass that surprises for its size and price. The passive radiator on the back of the unit adds low-end weight that you do not typically expect from a speaker in the Rs. 10,000 segment. The ULT button is the core feature — press it once for a moderate bass lift (ULT1), press again for a more aggressive boost (ULT2). For Bollywood remixes, hip-hop, and dance music, ULT2 mode genuinely transforms the listening experience.
Midrange reproduction is clear and vocal-forward, which makes it a good companion for podcasts, audiobooks, and spoken-word content alongside music. Treble is present without harshness at moderate volumes. At maximum volume, some compression is noticeable — this is expected at the price and size.
The soundstage is mono by design — there is no stereo separation from a single unit. Sony does offer a stereo pairing mode if you own two ULT10 units, but as a standalone speaker it delivers a single point of sound. For a bedroom, kitchen, or office desk in a Mumbai flat, this is perfectly adequate.
Build Quality and Design
The ULT10 has a cylindrical build with a fabric grille and rubberised top and bottom caps. It feels solid and well-finished for the price. The IP67 rating is the standout durability feature — this speaker can handle Mumbai monsoon conditions without any concern. Splashes, rain, and even brief submersion are not a problem.
At 680 g, it is genuinely portable. It fits in a bag side pocket and is easy to carry to a park, terrace, or office. There is no dedicated carry strap, but the size makes one unnecessary for most users.
Battery Life
16 hours of battery life at moderate volume is strong for the price. In real-world use at moderate to high volumes, expect 10 to 12 hours — enough for a full workday of background music or two evenings of use before charging. USB-C charging is fast and convenient.
Who Should Buy the Sony SRS-ULT10
The SRS-ULT10 is the right speaker for buyers who want a compact daily-carry Bluetooth speaker under Rs. 10,000, value bass performance over a flat reference sound, need genuine IP67 waterproofing for use during Mumbai's monsoon season, and prefer Sony build quality and warranty support over lesser-known brands.
It is not the right choice if you need loud output for a large room or outdoor gathering — for that, the SRS-XV500 or SRS-ULT70 are the right step up. The ULT10 is a personal-use speaker, not a party speaker.
ULT10 vs the Competition at Rs. 10,000
At this price, the ULT10 competes with the JBL Go 4 and Tribit StormBox Micro. Compared to these, the ULT10 offers better bass depth via the ULT button, a more premium build finish, and the Sony brand's established warranty and service network in India. The JBL Go 4 is more compact but noticeably less powerful. The ULT10 wins on output and bass performance at the cost of a slightly larger form factor.
Where to Buy in Mumbai
The Sony SRS-ULT10 is available at Sony Mony Electronics, an authorised Sony dealer in Mumbai. Purchasing from an authorised dealer ensures genuine Sony India warranty and access to Sony's authorised service centres across the city.
Visit sonymony.co.in to check current stock and pricing, or come into our store in Mumbai. At Rs. 9,990, the SRS-ULT10 is one of the best compact Bluetooth speakers in its price range in 2026 — genuinely punchy, waterproof, and built to last.