Sony ULT Field 5 Wireless Portable Bluetooth Speaker, IP67 Waterproof, Dustproof, and Rustproof with Enhanced Bass, 25 Hour Battery, 360° Party Light, and Shoulder Strap (SRSULT50B), Black

Great powerful speaker
I was pleasantly surprised by this speaker. The sound quality is real good for a portable speaker. I’m going to consider it portable because it has a well thought out strap and you can take it places with you. It is kind of heavy and large, but the dimensions are in the product description so nothing that I didn’t already know. The build quality of this speaker is top notch. When you hold it in your hand you feel like you got something for your money. The materials look and feel good, and the bass speakers in the end are well protected and punchy. I use this on a sailboat, pontoon boat, camping trips, and in the backyard. It just works and sounds great everywhere. I have gotten it wet and used it in very dusty environments with no issues. As far as sound goes, I’m not sure you could beat it with a speaker the same size or price. It is crisp and bass sounds good. At 100% volume it gets a little out of control but that is almost every speaker on the market. The battery life is all day with no issues. It has never died and I have used it for 10+ hours straight.

It can survive submersion and a rubberized watertight door on the back protects the ports.
This is a super amazing portable, mid-range bluetooth speaker. It sounds crisp and offers features such as the ULT sound boosting software, water resistance, while also boasting 68H of use using Stamina mode, which turns off ULT modes, EQ effects, and lighting to maximize longevity.Definitely give this speaker a try at your next gathering in a public park or patio with your friends and family -end. Overall a well-rounded speaker for the price range.

Great Room Energy, Modest Open-Air Projection
Review – Sony ULT Field 5 (2 Months of Use)First Impressions & ContextFor its price and size, the sound performance (power and overall quality) is above what I initially expected. However, it weighs close to 8 pounds. Carrying it short distances is fine, but for longer walks or if you’re already carrying other items, the weight becomes noticeable.My first impression was actually underwhelming, but that was influenced by context. I tested it in the same small room where I use a 5.1 home theater system (Sony STR-K5 750W 5.1 Home Theater System with a large subwoofer). I am used to that level of low-end presence in a confined space, so my expectations were biased.Real-World Use CaseMy goal was simple: energize a 10–15 m² indoor space with around 6 people. For that purpose, it performs well.Indoors, once you push it past 50% volume, it feels powerful and engaging. Below 30–40%, it does not feel particularly strong. It needs some volume to “wake up.”Outdoors is a different story. Sound disperses quickly without walls to reflect it, and the perceived impact drops significantly. While it still works for a table or small group setup, it does not project that “wow” presence from a distance. At around 20 meters, you won’t feel much presence. If your goal is to impress people in an open area, this may fall short.Sound PerformanceULT Mode:I mostly use ULT 2 because it delivers the extra punch I was looking for. ULT 1 feels more controlled, but ULT 2 brings the energy.Bass:For its size and price, bass performance is strong—especially in ULT 2. In small rooms, it can be surprisingly impactful. In open spaces up to around 10 meters, it still performs decently, but beyond that, the impact fades.Highs:Sony has improved here. Highs and lows blend well, and the sound does not feel muddy or overly bass-heavy. The tuning is balanced, though there is still room for refinement at higher volumes.I have not pushed it to 100% volume yet, but based on other user feedback, distortion seems well controlled.BatteryBattery life meets expectations. I use the 90% charge protection feature and typically listen around 60% volume. With that setup, it easily lasts through a full day outing. No complaints here.Portability & BuildBuild quality feels solid and premium. The weight suggests there is serious hardware inside. Materials and assembly feel compact and well put together.That said, portability is relative. The shoulder strap helps, but at nearly 8 pounds, it’s not something you casually carry long distances without noticing.App & ConnectivityThe Sony app is simple, clean, and functional. It does what it needs to do without unnecessary complexity.Pairing was slightly confusing at first. I initially paired it under a Google account with multiple devices, and later had trouble connecting a different device. I ended up doing a factory reset, which solved the issue. This may have been user error rather than a speaker problem.Latency has not been noticeable when watching videos, so synchronization seems solid.LightsIn a dark room, the 360° party lights do add some atmosphere and can enhance the overall experience. They are not overly aggressive and complement the music nicely. That said, I personally do not use them often, mainly to preserve battery life. They are a nice feature to have, but not essential for my typical use.Amazon Delivery & PackagingThe delivery experience was excellent. The unit arrived in perfect condition, very well packaged, with no dents or visible damage to the box. Everything was intact and properly protected. Overall, the shipping and handling were exactly what you would expect from Amazon—smooth and reliable.Final ThoughtsI chose this over the JBL Xtreme 4, and for my specific indoor use case, it has been a good choice. However, if your main goal is strong outdoor projection and noticeable presence at a distance, you may want to consider something larger.Indoors, it performs confidently. Outdoors, it becomes more modest—more of a “table speaker” than a crowd-puller.Overall, I would describe my experience as positive but situational. It delivers strong performance for its size, but expectations need to match realistic acoustic limitations.

Little speaker packs a mighty punch
This speaker is banging! I love the strap, great design choice for portability. The sound quality is amazing. The app has cool features that make it more personal experience. I bring this everywhere we go, my friends all want one too now!!!

Excellent!!I am an audiophile! Having said that, I pay attention to all things sound quality related. If you are like me,MP3 files etc don’t cut it. This model was made for the demanding listener. Not all Bluetooth codecs are the same My FiiO M11+ portable player has Ldac and a 3.5Line output. Both of these feature are able to be utilized on the Sony ult field 5. I play dsd and ripped cd files from my FiiO to the Sony. The sound of the Sony is often described as bass heavy. Nonsense. This speaker on the ult2 setting is rich full and natural.The speaker walks the fine line between just enough bass to sound natural,(bigger drivers) and reasonablePortability. The amplifier has decent power output to get to enthusiastic loudness, but still sounds very natural at modest levels as well, and a substantial sized lithium battery to have long all day listening sessions. Like other reviews have pointed out, the colour changing lights are a surprise. They are not too flashy, or over done. They add to the experience.The carry strap is very well made with the ends being metal and not plastic. The sound quality is very well tuned and musical. It is not boomy overblown bass.If you play lesser quality low bitrate files on a lesserQuality Bluetooth codecs, then perhaps you will have a different sound.But careful examination of this models features and build quality and its weight,(7lbs) will tell you the type of audio quality to expect at high bitrate playback over Ldac Bluetooth or direct line input, which is necessary for excellent sound quality. This is a portable Bluetooth speaker for the discerning listener.Well done Sony!

Una maravilla de audio, si bien el precio compensa el tamaño está increíble para una reunión o para escucharla en solitario, se adapta a cualquier tipo de música y la app cuenta con una sección para crear un ecualizador a gusto del usuario. No deja nada a expectativa y suena espectacular con cable o bluetooth. Sin duda mi próxima adquisición será la Ult 7.

Sony is Sony. Amazing premium product ULT FIELD 5 VERY VERY NICE SOUND SYSTEM. IN PORTABLE. Value for money. 👍👍👍👍👍👍👍👍