JBL Charge 6 vs Bose SoundLink Flex (2nd Gen)

Sourced-draft comparison. Verdict: DEPENDS. Charge 6 for runtime, volume, and power bank; Flex for packability and IP67 float. Manufacturer claims and published themes — not a lab test.

Evidence grade: sourced draft

JBL Charge 6 · ASIN B0DPKYBDDJ
Bose SoundLink Flex (2nd Gen) · ASIN B0D6WD2QSQ

TL;DR

DEPENDS — Charge 6 = runtime + volume + power bank; Flex = packability + IP67 float.

SOURCED DRAFT — manufacturer claims and published review themes. Actually Worth It has not run owned SPL or battery lab tests on either speaker. We do not invent prices, star ratings, or customer quotes.

JBL Charge 6 (White listing)
ASIN B0DPKYBDDJ. We do not list a price here because Amazon prices move constantly. Blue listing ASIN B0DXKMD2NH.
Check price on Amazon
Bose SoundLink Flex (2nd Gen), Black
ASIN B0D6WD2QSQ. We do not list a price here because Amazon prices move constantly.
Check price on Amazon

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Who it’s for

Charge 6: outdoor use (JBL IP68 + 1 m drop), a built-in power bank, Auracast pairing, and long hangs (up to 24 hours plus 4 hours Playtime Boost, JBL spec sheet).
Flex: a smaller speaker than Charge 6 (Bose: 2.06" H × 7.93" W × 3.56" D, 1.291 lb), IP67 that floats, and pair-two Stereo Mode or Party Mode via the Bose app.

Who it’s not for

Universal-winner hunters. There is no “best overall” here.
Ultralight packers who need Charge-class output (Charge 6 is about 2.11–2.18 lb per JBL) — or all-day backyard volume on Flex (Bose: up to 12 hours typical, about 3 hours at max).
Anyone who needs an aux jack. Charge 6: USB-C in/out, no aux/USB-A. Flex: no audio cable / no aux (Bose).

Decision-changing specs

Manufacturer claims and published themes. We did not measure these. No owned SPL or battery lab.

Price

JBL Charge 6: No dated MSRP on this page — check the current price on Amazon
Bose SoundLink Flex (2nd Gen): No dated MSRP on this page — check the current price on Amazon

Playtime

JBL Charge 6: Up to 24 hours plus 4 hours Playtime Boost, dependent on volume/content (JBL spec sheet)
Bose SoundLink Flex (2nd Gen): Up to 12 hours at typical levels, about 3 hours at max (Bose). TechGearLab measured 10.5 h in their test (their number, not ours).

IP

JBL Charge 6: IP68 (lab: up to 1.5 m freshwater, 30 min) and drop-proof from 1 m (JBL)
Bose SoundLink Flex (2nd Gen): IP67, floats (Bose)

Power bank

JBL Charge 6: Yes — USB-C in/out (JBL)
Bose SoundLink Flex (2nd Gen): Not listed as a power bank on the Bose.com specs used here

Size

JBL Charge 6: Cylinder class; confirm dimensions on the JBL Charge 6 spec sheet. We do not invent mm figures.
Bose SoundLink Flex (2nd Gen): 2.06" H × 7.93" W × 3.56" D (Bose)

Weight

JBL Charge 6: About 2.11–2.18 lb (0.96–0.99 kg) per JBL
Bose SoundLink Flex (2nd Gen): 1.291 lb (Bose)

Output theme

JBL Charge 6: 45 W total: 30 W woofer + 15 W tweeter RMS; 53×93 mm woofer, 20 mm tweeter; 56 Hz–20 kHz (−6 dB) (JBL). We did not measure SPL.
Bose SoundLink Flex (2nd Gen): No manufacturer wattage listed on the Bose.com specs used here. TechGearLab: sound-for-size (their framing, not our lab).

Extras

JBL Charge 6: Auracast pairing with other JBL speakers; Bluetooth 5.4; 34 Wh battery; ~3 hour charge at 12–20 V / 3 A (JBL)
Bose SoundLink Flex (2nd Gen): Stereo Mode or Party Mode via Bose app; Bluetooth 5.3; USB-C; ~4 hour charge; PositionIQ orientation EQ (Bose)

Cable

JBL Charge 6: USB-C in/out; no aux / no USB-A; reviews note no cable in the box on some packs
Bose SoundLink Flex (2nd Gen): USB-C; Bose: no audio cable / no aux

Spec comparison table: JBL Charge 6 vs Bose SoundLink Flex (2nd Gen)
	JBL Charge 6	Bose SoundLink Flex (2nd Gen)
Price	No dated MSRP on this page — check the current price on Amazon	No dated MSRP on this page — check the current price on Amazon
Playtime	Up to 24 hours plus 4 hours Playtime Boost, dependent on volume/content (JBL spec sheet)	Up to 12 hours at typical levels, about 3 hours at max (Bose). TechGearLab measured 10.5 h in their test (their number, not ours).
IP	IP68 (lab: up to 1.5 m freshwater, 30 min) and drop-proof from 1 m (JBL)	IP67, floats (Bose)
Power bank	Yes — USB-C in/out (JBL)	Not listed as a power bank on the Bose.com specs used here
Size	Cylinder class; confirm dimensions on the JBL Charge 6 spec sheet. We do not invent mm figures.	2.06" H × 7.93" W × 3.56" D (Bose)
Weight	About 2.11–2.18 lb (0.96–0.99 kg) per JBL	1.291 lb (Bose)
Output theme	45 W total: 30 W woofer + 15 W tweeter RMS; 53×93 mm woofer, 20 mm tweeter; 56 Hz–20 kHz (−6 dB) (JBL). We did not measure SPL.	No manufacturer wattage listed on the Bose.com specs used here. TechGearLab: sound-for-size (their framing, not our lab).
Extras	Auracast pairing with other JBL speakers; Bluetooth 5.4; 34 Wh battery; ~3 hour charge at 12–20 V / 3 A (JBL)	Stereo Mode or Party Mode via Bose app; Bluetooth 5.3; USB-C; ~4 hour charge; PositionIQ orientation EQ (Bose)
Cable	USB-C in/out; no aux / no USB-A; reviews note no cable in the box on some packs	USB-C; Bose: no audio cable / no aux

Spec comparison table: JBL Charge 6 vs Bose SoundLink Flex (2nd Gen)

Review themes (published — not our lab)

Trusted Reviews on Charge 6: calls it the speaker to beat in class; notes bass could go deeper and highs could stand out more. That is their framing, not a lab result from this site.
TechGearLab on Flex: praises sound-for-size and durability; notes shorter battery vs some rivals and no aux; they measured 10.5 h in their test (their number, not ours).

The rival is each other — a preference fork (runtime / volume / power bank vs packability / ticket / IP67 float), not a spec knockout. We are not repeating published dollar figures as current prices.

Hidden / recurring cost

USB-C brick: Charge 6 lists a ~3 hour charge at 12–20 V / 3 A (JBL) — do not assume a wall brick is in the box. Flex lists a ~4 hour USB-C charge (Bose). Some Charge 6 packs have no cable in the box (published review note). App lock-in: JBL Auracast pairing with other JBL speakers; Bose Stereo Mode / Party Mode via the Bose app. IP ratings are manufacturer lab claims, not a field test by this site.

Wait for a sale / skip if you own

No sticky dollar figure on this site — use the Amazon check-price links. If you already own either speaker, skip unless runtime + volume + power bank (Charge 6) or packability + IP67 float (Flex) is the reason you would switch. Check color ASINs; limited editions differ.

Verdict

Bottom line

DEPENDS — Charge 6 = runtime + volume + power bank; Flex = packability + IP67 float.

Sources: JBL Charge 6 spec sheet PDF / jbl.com Charge 6 page; Amazon White B0DPKYBDDJ, Blue B0DXKMD2NH; Bose.com SoundLink Flex 2nd Gen; Amazon Black B0D6WD2QSQ; Trusted Reviews (Charge 6); TechGearLab (Flex, including their 10.5 h measurement). This page is sourced draft copy — not a hands-on lab test by Actually Worth It. No owned SPL or battery lab.