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About this item BEST MIDRANGE BLUETOOTH SPEAKER: CNET Best of 2025. If you don’t take our word for it, trust…
Introduction
Looking for a Bluetooth speaker that packs a punch without breaking the bank? The Sony ULT Field 5 Wireless Portable Bluetooth Speaker (model SRSULT50B in black) has been making waves as the CNET Best Midrange Bluetooth Speaker of 2025. Priced at around $135, it boasts a stellar 4.6 out of 5-star rating from over 2,931 Amazon reviews. With features like IP67 waterproofing, enhanced bass via the ULT button, up to 25 hours of battery life, and party-ready 360° lighting, this speaker promises to elevate your music experience whether you’re at the beach, poolside, or hosting a backyard bash.
In this comprehensive review, we’ll dive deep into its performance, build quality, sound profile, and real-world usability. Drawing from expert testing insights, customer feedback, and hands-on comparisons, we’ll help you decide if the Sony ULT Field 5 is the ultimate portable audio companion for your needs. Keywords like “best waterproof Bluetooth speaker” and “Sony ULT Field 5 review” are buzzing for good reason—let’s explore why.
Product Overview
The Sony ULT Field 5 is designed for those who demand rugged durability and booming sound in a portable package. Measuring roughly the size of a large water bottle with a substantial 7-pound build, it features a shoulder strap for effortless carrying, making it ideal for outdoor adventures. Its IP67 rating ensures it’s fully dustproof, waterproof (submersible up to 1 meter for 30 minutes), and rustproof, perfect for harsh environments like beaches, pools, or rainy campsites.
Audio-wise, the speaker employs a 2-way active design with a dedicated woofer and tweeter, delivering enhanced power and sound pressure. The standout ULT button instantly boosts bass for that deeper, richer thump, while a 10-band equalizer in the Sony Music Center app lets you fine-tune clarity, depth, and balance. Connectivity includes Bluetooth 5.2 with support for high-quality codecs like LDAC for audiophiles, plus Party Connect to link up to 100 compatible Sony speakers for immersive multi-room sound.
Battery life shines with up to 25 hours of playback, and quick charging provides 2 hours from just 10 minutes—great for on-the-go users. Ambient 360° party lights sync with your music, adding vibe without overwhelming. At $135, it undercuts premium rivals like JBL or Bose while offering pro-level features. Available in black, it’s a sleek, matte-finished beast ready for action.
Pros
The Sony ULT Field 5 excels in several key areas, earning its high ratings from users and experts alike. Here are the top advantages:
- Exceptional Bass and Sound Quality: The ULT button delivers pulsating, enhanced bass that’s richer and more controlled than many competitors. Customers rave about its natural sound on high-bitrate files via LDAC, with crisp highs and balanced mids—ideal for EDM, hip-hop, or rock.
- Rugged IP67 Durability: Fully waterproof, dustproof, and rustproof, this speaker thrives in extreme conditions. Reviewers confirm it survives pool splashes, beach sand, and rain without a hitch, backed by sturdy rubber ends for drop protection.
- Impressive 25-Hour Battery with Quick Charge: Long sessions are no problem, with real-world tests matching Sony’s claims. The 10-minute quick charge for 2 hours of play is a lifesaver for spontaneous parties.
- Portable Design with Shoulder Strap: At 7 pounds, it’s hefty but the integrated metal-ended strap makes carrying a breeze, like a personal boombox for hikes or tailgates.
- Customizable Audio via 10-Band EQ and Party Connect: The app’s EQ allows precise tweaks, while linking multiple units creates stadium-like sound—perfect for larger gatherings.
- Vibrant 360° Party Lights: Subtle, music-synced lighting enhances the atmosphere without being garish, adding fun to nighttime events.
- Great Value at $135: Outperforms pricier JBL Flip 7 or Bose options in bass and battery, per user comparisons, making it a budget-friendly powerhouse.
Cons
No speaker is perfect, and the ULT Field 5 has a few drawbacks worth noting for balanced decision-making. While its strengths dominate, here’s where it falls short:
- Bulky Size and Weight: At 7 pounds and larger dimensions, it’s not as pocketable as slimmer models like the JBL Flip series. Some users find it verges on “too big” for everyday carry, better suited for shoulders than pockets.
- Bass-Heavy Profile May Not Suit All: The ULT boost can overpower mids and vocals for purists or acoustic fans. Without EQ tweaks, it might sound boomy on lower-quality streams.
- Lights Can’t Be Fully Disabled: The ambient lighting, while cool for parties, dims but doesn’t turn off completely, potentially annoying in quiet settings or bedrooms.
- No Built-in Microphone for Calls: Unlike some rivals, it lacks a speakerphone, limiting hands-free use during calls or voice assistants.
- App Dependency for Full Features: EQ and advanced controls require the Sony Music Center app, which can be finicky on older phones or drain battery if left open.
Customer Reviews Analysis
With a 4.6-star average from 2,931 reviews, the Sony ULT Field 5 garners overwhelmingly positive feedback, but let’s break it down honestly.
Positive Highlights (Majority of 5-Star Reviews): Users consistently praise its sound quality, with audiophiles highlighting LDAC support for “rich, full, and natural” playback from high-res sources like ripped CDs or DSD files. One reviewer called it a “portable Bluetooth speaker for the discerning listener,” noting its non-boomy bass, powerful amp, and all-day battery. Portability shines via the strap, and comparisons favor it over JBL Flip 7 (better sound, cheaper) and Bose SoundLink Micro (superior volume and bass). Battery life exceeds expectations, lasting “several days with multiple hours,” and lights add “surprise value” without flashiness. Party Connect and IP67 features seal deals for outdoor enthusiasts.
Common Complaints (Lower-Star Reviews): Despite the high average, some note its size as a portability limiter—”verges on too big to carry everywhere.” Bass emphasis draws minor gripes for non-bassheads, though EQ mitigates this. A few mention no call functionality and occasional Bluetooth hiccups in crowded areas. Interestingly, some “negative” reviews in aggregates seem misplaced positives, underscoring the product’s broad appeal. Durability tests well, but one user wished for lighter weight. Overall, 80%+ are 4-5 stars, with value driving repeat buys.
Trends show it’s a hit for parties, showers, pools, and travel, outperforming expectations at $135.
Frequently Asked Questions
Here are answers to the most common queries about the Sony ULT Field 5 based on specs, tests, and reviews:
- How long does the battery last? Up to 25 hours at moderate volume without ULT mode; real-world use hits 20+ hours. Quick charge: 10 minutes for 2 hours.
- Is it truly waterproof? Yes, IP67 rating means submersible in 1m water for 30 minutes, dust-tight, and rustproof—great for pools or rain, but avoid prolonged submersion.
- Can you pair multiple speakers? Absolutely, Party Connect links up to 100 compatible Sony speakers for stereo or multi-room setups via the app.
- Does it support high-quality audio codecs? Yes, Bluetooth 5.2 with LDAC, SBC, and AAC for hi-res streaming from Android devices or wired input.
- What’s the return policy or warranty? Amazon’s standard 30-day returns apply; Sony offers a 1-year limited warranty. Check for defects like rare pairing issues.
Who Should Buy This Product
The Sony ULT Field 5 is tailor-made for:
- Bass Lovers and Party Hosts: If you crave rumbling lows and immersive lights for gatherings, this is your go-to.
- Outdoor Adventurers: Hikers, beachgoers, and campers need its IP67 toughness and strap for all-weather reliability.
- Audiophiles on a Budget: LDAC and 10-band EQ deliver premium sound under $150, beating many midrange rivals.
- Families or Groups: Long battery and Party Connect make it ideal for pool parties, BBQs, or road trips.
Skip it if you want ultra-compact size (try Sony ULT Field 1), call integration, or neutral sound without bass emphasis.
Final Verdict
The Sony ULT Field 5 earns its CNET accolade as the best midrange Bluetooth speaker of 2025, blending rugged portability, thunderous bass, and smart features at an unbeatable $135 price. Its 4.6-star rating from thousands reflects genuine delight in sound, battery, and durability, with minor cons like size easily overlooked for most. Compared to JBL or Bose, it offers superior value and bass without sacrificing quality.
Recommendation: Buy It. Perfect for anyone seeking a versatile, party-ready powerhouse. If your lifestyle involves music on the move, this speaker will rumble your world—your neighbors (and ears) won’t complain.
