Product Overview
The JBL Go 4 is a compact wireless speaker designed for portable audio playback from Bluetooth-enabled devices. This black version is identified by model number JBLGO4BLKAM and uses a single 45 mm full-range transducer powered at 4.2 watts RMS. Its small enclosure measures approximately 3.7 inches wide, 3.0 inches high, and 1.7 inches deep.
The speaker uses Bluetooth 5.3 and supports A2DP and AVRCP profiles for wireless audio playback and media control. An IP67 environmental rating provides documented resistance to dust and temporary water immersion under the conditions defined by that rating. A built-in rechargeable lithium-ion polymer battery provides up to seven hours of normal music playback, depending on volume and program material.
The Go 4 also supports Auracast-compatible speaker connections and can pair with another Go 4 for stereo playback. Configuration and equalizer adjustments are available through the JBL Portable app. An integrated carrying loop is built into the enclosure, while USB-C is used for charging. The speaker does not require a wired audio source for normal operation.
Product Information
Identification
| Field | Value |
|---|---|
| Brand | JBL |
| Manufacturer | HARMAN International Industries, Incorporated |
| Category | Portable Bluetooth Speaker |
| Series | JBL Go |
| Model | JBLGO4BLKAM |
| MPN | JBLGO4BLKAM |
| UPC | 050036399289 |
| ASIN | B0CTNWBT1Z |
Physical
| Field | Value |
|---|---|
| Color | Black |
| Dimensions | 94.3 × 75.7 × 42.2 mm (3.7 × 3.0 × 1.7 in) |
| Weight | 0.19 kg (0.42 lb) |
| Shipping Weight | 0.32 kg (0.69 lb) gross packaged weight |
| Size | Ultra-portable |
Product Identifier Summary
A model number identifies a particular product configuration and can help distinguish color, regional, or hardware variants within the same product family. An MPN, or manufacturer part number, is assigned by the manufacturer for inventory, service, documentation, and product identification.
A UPC is a standardized retail product code commonly used for inventory and barcode identification in North America. An EAN performs a similar identification function in markets that commonly use the European Article Number system. A GTIN is the broader global identification framework that includes formats such as UPC and EAN.
An ASIN is a catalog identifier used within a specific online product database and can distinguish individual product listings or variations. ISBN identifiers apply to books and certain published media and are not applicable to this portable speaker.
Common Uses
The JBL Go 4 is commonly used for portable music, podcasts, spoken-word audio, and other Bluetooth audio from compatible phones, tablets, and computers. Its compact dimensions make it suitable for desks, bedrooms, hotel rooms, backpacks, and other locations where a small standalone speaker is practical.
Its documented dust and water resistance also supports use around pools, beaches, campsites, patios, and other outdoor environments when operated within the limitations of the IP67 rating.
Maintenance and Care
Keep the USB-C charging connection clean and free from moisture, dirt, and foreign material. Allow the speaker and charging area to dry before connecting a charging cable after exposure to water.
Avoid abrasive cleaners, solvents, and cleaning methods that could damage the enclosure or fabric covering. Store the speaker away from excessive heat and recharge the battery periodically when the product will remain unused for an extended period.
Safety Information
The JBL Go 4 has an IP67 ingress-protection rating. This classification covers dust protection and temporary water immersion under standardized test conditions, but it does not make the speaker suitable for every type of liquid exposure or prolonged underwater operation.
The manufacturer specifies a maximum operating temperature of 45°C. The speaker contains a rechargeable lithium-ion polymer battery and should not be exposed to fire, excessive heat, puncturing, crushing, or unauthorized battery modification.
The charging connector should not be used while wet. Users should follow the supplied safety sheet and charging instructions when operating or charging the speaker.
Technical Specifications
| Specification | Value |
|---|---|
| Transducer | 45 mm (1.75 in) |
| Rated Output Power | 4.2 W RMS |
| Frequency Response | 90 Hz–20 kHz |
| Signal-to-Noise Ratio | Greater than 85 dB |
| Bluetooth Version | 5.3 |
| Bluetooth Profiles | A2DP 1.4, AVRCP 1.6 |
| Bluetooth Frequency Range | 2400 MHz–2483.5 MHz |
| Bluetooth Transmitter Power | 9 dBm EIRP or less |
| Bluetooth Modulation | GFSK, π/4 DQPSK |
| Ingress Protection | IP67 |
| Battery Type | Lithium-ion polymer |
| Battery Capacity | 3.23 Wh, equivalent to 3.8 V / 850 mAh |
| Charging Time | Approximately 3 hours at 5 V / 1 A |
| Music Playback Time | Up to 7 hours, dependent on volume and audio content |
| Playtime Boost | Up to 2 additional hours |
| Charging Connection | USB Type-C |
| Multi-Point Connection | Supported |
| Auracast | Supported |
| Maximum Operating Temperature | 45°C |
| Packaging Dimensions | 125 × 103 × 56.5 mm (4.9 × 4.0 × 2.2 in) |
Product History
The JBL Go 4 was publicly introduced in January 2024 as part of an updated group of JBL portable speakers that also included the Clip 5 and Xtreme 4. The new generation added Auracast connectivity, JBL Portable app support, revised styling, and updated wireless capabilities compared with the earlier Go 3.
The Go 4 became commercially available during 2024. It belongs to JBL’s long-running Go family of compact Bluetooth speakers. The JBL Go 5 was introduced in 2026 as the subsequent generation in the series.
Key Features
- Compact single-driver portable speaker design.
- Bluetooth 5.3 wireless audio connectivity.
- IP67-rated protection against dust and water exposure.
- Integrated carrying loop for portable use.
- Auracast support for compatible multi-speaker connections.
- Ability to pair two Go 4 speakers for stereo playback.
- JBL Portable app support for firmware functions and equalizer adjustment.
- Playtime Boost mode for extending battery operation.
- USB-C battery charging.
- Construction incorporates post-consumer recycled plastic and recycled fabric in specified components.
Package Contents
- JBL Go 4 portable speaker
- USB Type-C charging cable
- Quick Start Guide
- Warranty Card and Safety Sheet
Compatibility
The JBL Go 4 works with Bluetooth audio sources that support compatible Bluetooth profiles, including many smartphones, tablets, laptops, and computers. Normal wireless audio playback does not require the source device to use the JBL Portable app.
The JBL Portable app provides additional configuration, firmware, and equalizer functions on supported mobile devices. Auracast functionality requires other compatible Auracast-enabled speakers or transmitting equipment.
Two JBL Go 4 speakers can be linked for stereo playback. Compatibility with older JBL proprietary speaker-linking systems should not be assumed unless explicitly documented for the other device.
Frequently Asked Questions
How can the black JBL Go 4 model be identified?
The black North American version covered on this page uses model and manufacturer part number JBLGO4BLKAM. The model designation is useful when checking accessories, support documents, warranty information, or replacement products.
Can the JBL Go 4 connect to a smartphone?
Yes. It can receive audio from compatible smartphones using Bluetooth. Pairing is performed through the Bluetooth settings of the source device.
Can it connect to two source devices?
The Go 4 supports Bluetooth multipoint functionality, allowing compatible source devices to maintain connections according to the speaker’s supported connection behavior.
Can two JBL Go 4 speakers play together?
Yes. Two Go 4 units can be paired for left-and-right stereo playback. The model also supports Auracast connections with compatible speakers.
Is an app required to use the speaker?
No. Basic Bluetooth pairing and playback can be performed without an app. The JBL Portable app is used for additional functions such as equalizer adjustments, firmware updates, and supported speaker features.
Can the speaker be used near water?
The enclosure carries an IP67 rating, providing defined protection against dust and temporary water immersion. The charging port should be dry before a charging cable is connected.
Does the JBL Go 4 have an auxiliary audio input?
No analog auxiliary input is documented for this model. Bluetooth is the primary audio connection, while the USB-C port is used for charging.
How should the speaker be cleaned?
Surface dirt can be removed carefully without abrasive chemicals or aggressive cleaning methods. Particular attention should be given to keeping the charging connector free of moisture and debris.
Does the Go 4 support equalizer adjustment?
Yes. Compatible versions of the JBL Portable app provide preset and customizable equalizer controls for adjusting frequency balance.
What warranty documentation is supplied?
A warranty card and safety sheet are included with the product. Warranty eligibility and coverage depend on region, seller status, purchase documentation, and the applicable manufacturer’s terms.
Buying Considerations
The Go 4 is designed around portability rather than high acoustic output or extended low-frequency reproduction. Its physical size, single compact transducer, and battery capacity should be considered when comparing it with larger portable speakers.
Users who need extended listening periods should also consider the documented battery runtime and charging time. Actual operating time varies with playback volume, audio material, wireless conditions, and use of features such as Playtime Boost.
Multi-speaker users should verify the connection technology of existing speakers. Auracast compatibility does not imply compatibility with every older JBL wireless linking system.
The precise model number should be checked when comparing color variants because regional and color-specific part numbers can differ within the Go 4 family.
Customer Feedback Summary
This section summarizes recurring themes found in publicly available customer and product feedback. These observations are generalized opinions and are not verified technical specifications.
Portability is one of the most frequently noted strengths. Users commonly describe the speaker as easy to carry in a bag or small space, while the integrated loop and water-resistant construction are often viewed as useful for travel and outdoor use.
Feedback about audio quality commonly notes that the Go 4 produces clear and comparatively substantial sound for its physical size. The app-based equalizer and straightforward Bluetooth connection are also recurring positive themes.
Common limitations relate to the constraints of the compact enclosure. Deep bass reproduction is more limited than on larger speakers, and users seeking higher output for large spaces may find the speaker’s scale restrictive. Battery duration is also shorter than that of many physically larger portable speakers. Playtime Boost can extend operation, but the mode changes audio processing to conserve power.
Related Products
- JBL Go 3 – earlier generation in the compact Go speaker family.
- JBL Go 5 – subsequent generation of the Go portable speaker series.
- JBL Clip 5 – compact portable speaker with an integrated carabiner-style attachment.
- JBL Flip series – larger portable Bluetooth speakers designed for greater output and longer listening sessions.
- JBL Xtreme series – larger battery-powered portable speakers intended for higher-output applications.
Last Updated
August 17, 2026
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