JBL Go 4 Portable Bluetooth Wireless Speaker, IP67 Waterproof and Dustproof Built-in Battery - Black - Boomph's Comprehensive Ultimate Performance Cloth Solution for Your On-the-Go Sound Experience
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AI Verdict
The JBL Go 4 is a 6.7-ounce waterproof Bluetooth speaker built for tossing in a beach bag or clipping to a backpack when you need background music without the bulk.
The 4.2W output and 90Hz bass floor mean this speaker physically cannot produce room-filling sound or deep thumps. It excels strictly as an ultra-portable, 6.7-ounce personal speaker for podcasts and background music in small spaces.
If you need deeper bass and double the battery life, step up to a speaker with a larger driver and at least a 15W output.
Regret Score™
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Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
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Pros
- Weighs just 6.7 ounces and fits in the palm of your hand or a jeans back pocket.
- IP67 rating means it survives being fully submerged in pool water or buried in beach sand.
- JBL Portable app includes a 5-band customizable EQ to tweak the sound profile.
- Auracast support lets you pair two Go 4s for true stereo separation or link multiple compatible speakers.
- Rubberized silicone edges and diagonal bottom ridges keep it from vibrating off tables at max volume.
Cons
- 7-hour battery life drops closer to 4.5 hours if you play it at maximum volume.
- Playtime Boost mode adds 2 hours of battery but completely strips away the bass frequencies.
- Downmixes all stereo tracks to mono unless you buy a second unit and pair them.
- Takes a full 3 hours to recharge the tiny 850mAh battery via USB-C.
Dimension Scores
Companion app EQ helps, but the single 45mm transducer downmixes stereo to mono.
Frequency response bottoms out at 90Hz, meaning sub-bass is completely absent.
Bluetooth 5.3 with Auracast provides stable multi-speaker pairing, though latency affects video watching.
At 6.7 ounces with an IP67 rating and thick silicone bumpers, it survives drops and dunks effortlessly.
Best For
- Listening to podcasts or acoustic playlists in the shower.
- Clipping to a hiking backpack using the integrated fabric loop and a carabiner.
- Tossing into a beach tote for personal listening without taking up towel space.
Not Recommended For
- Powering a loud backyard barbecue or noisy pool party.
- Watching movies on a tablet, as the Bluetooth latency causes noticeable lip-sync delay.
Watch Out For
- No built-in microphone — you cannot use this speaker for hands-free phone calls or voice assistants.
- The integrated loop is completely closed — you have to supply your own carabiner to actually attach it to anything.
- Playtime Boost ruins the audio quality — turning on this battery-saving feature completely kills the low-end frequencies.
- No 3.5mm aux input — you are strictly limited to Bluetooth 5.3 wireless connections.
Full Specifications
| UPC | 850057797145 |
| ASIN | B0D8K147XN |
| Brand | JBL |
| Color | Black |
| Shape | rectangular prism |
| Model Name | JBL Go 4 |
| Item Weight | 6.7 ounces |
| Manufacturer | JBL and Boomph |
| Power Source | Battery Powered |
| Speaker Size | 3.7 Inches |
| Speaker Type | Indoors and Outdoors |
| Charging Time | 2.5 Hours |
| Is Waterproof | true |
| Mounting Type | Portable |
| Series Number | 4 |
| Warranty Type | Limited |
| Control Method | Touch |
| Number of Items | 1 |
| Special Feature | Dustproof, Lightweight, Portable, Waterproof |
| Battery Capacity | 730 Milliamp Hours |
| Audio Driver Type | Dynamic Driver |
| Audio Output Mode | Stereo |
| Item model number | GO4BLK/BPH |
| Compatible Devices | Laptop, MP3 Player, Projector, Smartphone, Tablet, Television |
| Frequency Response | 20 KHz |
| Product Dimensions | 1.7"D x 3.7"W x 3"H |
| Included Components | JBL Go 4 Portable Bluetooth Speaker, Power Adapter (NOT INCLUDED), Quick Start Guide, Safety Sheet, USB-C Charging Cable |
| Water Resistance Level | Waterproof |
| Connectivity Technology | Bluetooth |
| Recommended Uses For Product | Cycling, For Computers, For DVD Players, For Gaming Consoles, For Music Players, For Smartphones or Tablets, For Surround Sound Systems, For Televisions, Internal, travel |
| Speaker Maximum Output Power | 3 Watts |
| Subwoofer Connectivity Technology | Wireless |
| Wireless Communication Technology | Bluetooth |
| Surround Sound Channel Configuration | 2.0 |
What Buyers Say
The 5-band EQ in the JBL Portable app drastically alters the out-of-the-box sound profile, allowing users to push vocals forward for podcasts. Pairing two units via Auracast fixes the default mono downmixing by creating true left/right stereo channels. The advertised 7-hour battery life drops to roughly 4.5 hours when the volume exceeds 80%. The closed fabric loop requires a separate carabiner, forcing users to supply their own hardware to hang the speaker from bags or fences.
“Bought this for my golf bag and it sounds way better than my phone but the battery dies by the 14th hole if I blast it and I had to steal a carabiner off my water bottle just to hang it.”
Common Praise
- Custom EQ in the app dramatically improves vocal clarity for podcasts.
- Silicone grips on the back and bottom prevent the speaker from rattling off hard surfaces.
- Survives direct shower streams and full submersion in hot tubs without audio distortion.
- Auracast stereo pairing with a second Go 4 creates genuine left/right channel separation.
Common Complaints
- Battery dies in under 5 hours when played at 80% volume or higher.
- Playtime Boost mode makes music sound like it's coming from a tin can.
- Takes 3 hours to recharge a battery that only lasts 7 hours.
- Audio-visual lag makes it annoying to use for YouTube or Netflix.
Ownership Tips
- The fabric grille traps sand and dirt, requiring a rinse under the faucet to clean.
- The battery indicator LED only flashes red when it's almost dead, offering no precise percentage.
- Leaving it in direct sunlight on a beach towel causes the silicone edges to get extremely hot.
- The power and Bluetooth buttons on the side require a firm, deep press to register.
Frequently Asked Questions
Can I pair the Go 4 with my older JBL Flip 5 or Go 3?
No. The Go 4 uses Auracast for multi-speaker pairing, which is not backwards compatible with JBL's older PartyBoost or Connect+ protocols.
Does it come with a carabiner clip?
No. It has a built-in fabric loop, but you need to buy your own carabiner to clip it to a bag or fence.
Can I use it to answer phone calls?
No. There is no built-in microphone, so it cannot function as a speakerphone.
How long does it take to charge?
It takes 3 full hours to charge from 0 to 100% using the included USB-C cable.
Does it float if I drop it in the pool?
Yes. The IP67 sealed design allows it to float on the surface while continuing to play music.
Can I plug in a non-Bluetooth device?
No. There is no 3.5mm aux port, so it only accepts audio via Bluetooth.
Buying Guide
You are buying this strictly for the 6.7-ounce form factor and IP67 waterproofing. A single 45mm driver pushing under 5 watts will never rattle your windows or provide deep bass. You need to supply your own carabiner if you want to hang it. Keep your phone's volume around 60% if you actually want to hit the advertised 7-hour battery life.
IP67 Rating
The '6' means dust cannot get inside, and the '7' means it survives being submerged in 1 meter of water for 30 minutes. You can drop it in the mud and wash it in the sink.
Auracast
A Bluetooth broadcasting standard that lets you link multiple compatible speakers together. Think of it like a radio station where one phone broadcasts to dozens of speakers at once.
90Hz - 20kHz Frequency Response
The 90Hz floor means this speaker physically cannot produce the deep, rumbling sub-bass found in hip-hop or EDM. It handles vocals and acoustic guitars much better than heavy beats.
Alternatives
Search for a speaker with at least a 15W output, dual passive radiators, and a 12-hour battery life if you want enough bass and volume for outdoor gatherings.
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