Short answer: the Bose Soundlink Flex. It ranks #34 of 136 medium speakers by sound quality at $84.99; the Sony XB23 ranks #64 and costs $100, which makes this an easy call rather than a real tradeoff.
What the Bose Soundlink Flex offers: IP67 rated; rugged enough to survive drops from several feet and floats. Around 12 hours of battery at moderate volume. Watch for: Not stereo. Warm sounding with overly boosted bass which drowns out midrange detail
What the Sony XB23 offers: Reasonably neutral. IP67 rated with a strap hook for backpacks. USB-C charging; up to 12 hour battery life. Watch for: Bass drops off a ton at high levels. Reduces its own volume over time when turned to max
Buy the Bose Soundlink Flex. It ranks higher for sound quality than the Sony XB23 and costs less, so there is no real case for the other one.
There is a real gap in water resistance: the Bose Soundlink Flex at IP67 (brief submersion) against the Sony XB23, which has IPX4 (splashing).
Specifications Side By Side
| Bose Soundlink Flex | Sony XB23 | |
|---|---|---|
| Price | $84.99 | $100 |
| Ranked | #34 of 136 in Medium Size Portable Bluetooth Speakers | #64 of 136 in Medium Size Portable Bluetooth Speakers |
| App | Yes | Yes (Sony Music Center) |
| Bass Extension (-10dB) | 56Hz | 67Hz |
| Battery Life | 12 hours (Manufacturer specified) | 12 hours (Manufacturer specified) |
| Built in Microphone | Yes | Yes |
| EQ | No | Yes (3-band: bass, mid, treble) |
| IP Rating | IP67 | IPX4 |
| Bluetooth Latency | 33ms | - |
| Max Volume | 96dB | 95dB |
| Party Mode | Yes (Bose Party mode) | Yes (Party Connect up to 100 speakers) |
| Power Input | USB-C | - |
| Stereo | No | - |
| Omnidirectional | No | No |
| TWS | Yes | - |
| Weight | 1.3 lbs / 589 g | 1.3 lbs / 580 g |
| Bluetooth Version | 4.2 | 5.0 |
| Dimensions | 7.9" x 3.5" x 2" (201 x 90 x 52 mm) | 3" x 8.6" x 3" (76 x 218 x 76 mm) |
| Drivers | 1x 60mm full-range driver + 2x passive radiators | 2x 42x51mm X-Balanced racetrack drivers + 2x passive radiators |
| Digital Aux Input | No | No |
| Output Power | - | 8W RMS |
| Bluetooth Codecs | - | SBC, AAC, LDAC |
Related Speaker Comparisons
More useful head-to-heads from the same speaker class:
- JBL Charge Essential 2 vs Xiaomi Sound Outdoor
- Bose Soundlink Flex 2nd gen vs Tribit Xsound Surf
- JBL Flip 6 vs JBL Flip 4
- Bose Soundlink Flex vs Minirig Mini 2
- Bose Soundlink Flex vs Ultimate Ears Roll 2
Prices on this page were last checked August 27, 2026 at 10:09 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Speakers In Full
Bose Soundlink Flex: $84.99 Amazon eBay
Pros: IP67 rated; rugged enough to survive drops from several feet and floats. Around 12 hours of battery at moderate volume.
Cons: Not stereo. Warm sounding with overly boosted bass which drowns out midrange detail
Full Bose Soundlink Flex review and specifications →
| App | Yes |
|---|---|
| Bass Extension (-10dB) | 56Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Latency | 33ms |
| Bluetooth Version | 4.2 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 7.9" x 3.5" x 2" (201 x 90 x 52 mm) |
| Drivers | 1x 60mm full-range driver + 2x passive radiators |
| EQ | No |
| IP Rating | IP67 |
| Max Volume | 96dB |
| Omnidirectional | No |
| Party Mode | Yes (Bose Party mode) |
| Power Input | USB-C |
| Stereo | No |
| TWS | Yes |
| Weight | 1.3 lbs / 589 g |
- Links
- Reviews, Comparisons and Sound Samples
- Joy & Oluv’Sone: Bose Soundlink Flex 2nd gen vs Flex More from Oluv’Sone →
- Alan Ross Reviews: Bose Soundlink Flex Review! vs JBL Flip 6 and JBL Charge 5. Travel heaven?? 🤞 More from alanrossreviews →
- Joy & Oluv’Sone: Bose Soundlink Flex 2nd gen vs Flex
- Alan Ross Reviews: Beats Pill vs Harman Luna vs Bose Flex vs Soundcore Motion Plus
- Alan Ross Reviews: Tribit Xsound Mega vs the world! (JBL Charge 5, Bose Flex, Sony XB33, LG PL7) 👍
- Alan Ross Reviews: Bose Soundlink Flex vs Soundcore Boost vs Bogasing M4 - cheap or Bose?
- Alan Ross Reviews: Tribit Stormbox Flow has deeper bass than the Bose Flex but………..
- Jay’s Straight Up Reviews & More: Tribit Stormbox Flow vs Soundcore Motion 300 (LDAC) 😵 Budget Bose Soundlink Flex “Inspired” Speakers More from JaysStraightUpReviews →
- Oluv Patreon: Soundcore Motion 300 = Bose Soundlink Flex = Earfun UBoom L?
- Alan Ross Reviews: Bose Soundlink Flex or JBL Flip 6 (eq adjusted) or Denon Envaya - best speaker for travel!
- Alan Ross Reviews: Bose Soundlink Flex or Beosound A1 (1st gen) - ultimate compact speaker 😇
- Alan Ross Reviews: Bose Soundlink Flex or JBL Flip 6 (eq adjusted) or Denon Envaya - best speaker for travel!
- Jay’s Straight Up Reviews & More: Tribit Stormbox Flow vs Soundcore Motion 300 (LDAC) 😵 Budget Bose Soundlink Flex “Inspired” Speakers
- Patricio Benadon: Bose SoundLink Flex vs. Mini 2 SE. Music audio quality sound test. Listen 4 different genres!
- Patricio Benadon: Bose SoundLink Flex vs. Mini 2 SE. Music audio quality sound test. Listen 4 different genres!
- Danny Pops: BEST Bose Speaker?? Bose Soundlink Flex vs micro, Color II, and revolve + More from DannyPops →
- Alan Ross Reviews: Bose Soundlink Flex vs Minirig MK3 and Marshall Emberton - best bluetooth speaker?
- Joy & Oluv’Sone: JBL, Bose, B&O, Sonos, Earfun, SoundCore… which portable speaker sounds best?
- Alan Ross - The Anti Shill!: Small speaker, mighty sound, The Flex gen 2 shatters physics!
- Reddit Search for Bose Soundlink Flex Review
- Head-to-Head Comparisons
- Bose Soundlink Flex vs Bose Soundlink Flex 2nd gen
- Bose Soundlink Flex vs JBL Charge Essential 2
- Bose Soundlink Flex vs Tribit Xsound Plus 2
- Bose Soundlink Flex vs Teufel Rockster XS
- Bose Soundlink Flex vs Soundcore Motion 100
- Bose Soundlink Flex vs Tribit Stormbox Pro
- Bose Soundlink Flex vs Soundcore Boom 3i
- Bose Soundlink Flex vs Xiaomi Sound Outdoor
- See all 77 comparisons
Sony XB23: $100 eBay
Pros: Reasonably neutral. IP67 rated with a strap hook for backpacks. USB-C charging; up to 12 hour battery life.
Cons: Bass drops off a ton at high levels. Reduces its own volume over time when turned to max
Full Sony XB23 review and specifications →
| App | Yes (Sony Music Center) |
|---|---|
| Bass Extension (-10dB) | 67Hz |
| Battery Life | 12 hours (Manufacturer specified) |
| Bluetooth Codecs | SBC, AAC, LDAC |
| Bluetooth Version | 5.0 |
| Built in Microphone | Yes |
| Digital Aux Input | No |
| Dimensions | 3" x 8.6" x 3" (76 x 218 x 76 mm) |
| Drivers | 2x 42x51mm X-Balanced racetrack drivers + 2x passive radiators |
| EQ | Yes (3-band: bass, mid, treble) |
| IP Rating | IPX4 |
| Max Volume | 95dB |
| Omnidirectional | No |
| Output Power | 8W RMS |
| Party Mode | Yes (Party Connect up to 100 speakers) |
| Weight | 1.3 lbs / 580 g |
- Links
- Reviews, Comparisons and Sound Samples
- Alan Ross Reviews: Sony XB23 vs JBL Flip 5 v Tribit Maxsound Plus More from alanrossreviews →
- Alan Ross Reviews: Huawei Sound Joy vs Sony xb23 - worse or worser? 🤭
- Alan Ross Reviews: Sony XB23 vs XB33 - specs and measurements
- GYMCADDY: Sony XE200 Review And Compared to Sony XB23 - It Got The XE300 Treatment More from GYMCADDY →
- Reddit Search for Sony XB23 Review
- Head-to-Head Comparisons