Best for Backwards compatibility
Bang & Olufsen Beosound A1 Speaker 3rd Gen
4.6 feature score
Highest scored product for this feature based on supporting review evidence.
Best Portable Bluetooth Speakers for Backwards compatibility
Backwards compatibility Decision Dashboard
Safest pick
Sony ULT Field 5 Speaker
4.3 feature score
Balances feature score, supporting reviews, and overall product strength.
Most evidence
JBL Charge 6 Portable Bluetooth Speaker
9 supporting reviews
Has the broadest review evidence for this feature.
Best overall product
Tribit StormBox Micro 3
4.3 overall score
Strongest overall product among items with scored evidence for this feature.
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Backwards compatibility is a strength for stereo pairing because the third-generation speaker can pair with a second-generation A1.
Pros: Wired input, Water resistance rating
Cons: AirPlay compatibility, Wi-Fi streaming reliability
Backward-style ecosystem compatibility was supported through Party Connect mentions that included older Sony models such as XG500, XG300, XE-series, XP-series, and other ULT speakers.
Pros: Dust resistance rating, Water resistance rating
Cons: Smart assistant integration (Alexa, Omnidirectional sound
Backwards compatibility is decent, with familiar Roam sound/features and evidence that original Roam units can pair or remain compatible in some contexts.
Pros: Dust resistance rating, Water resistance rating
Cons: Multipoint connectivity, Google
PartyCast compatibility extends across supported Soundcore speakers, though at least one review notes it is not cross-brand compatible.
Pros: Bluetooth range, Loudness / maximum volume
Cons: Smart assistant integration (Alexa, Voice assistant responsiveness
Backwards compatibility is mixed, with app support limited to later Tribit products but TWS pairing extending to at least some newer different Tribit models.
Pros: Price / value for money, Value for money
Cons: Dust resistance rating, Audio format support
Backward pairing behavior is reported inconsistently: some sources state pairing with Wonderboom 3 is supported, while at least one review claims stereo pairing only works with another Wonderboom 4.
Pros: Water resistance rating, Dust resistance rating
Cons: Wired input availability, Speakerphone quality
Backwards or legacy use is helped by AUX input, but old and new Katch units cannot be paired together.
Pros: Battery life (if portable), Cabinet construction / bracing
Cons: App reliability, Dust resistance rating
Can be grouped with older Sonos speakers, but cannot form a dedicated stereo pair with the original Move.
Pros: Dynamic headroom, Battery life (if portable)
Cons: Speakerphone quality, Chromecast compatibility
Backwards compatibility is weak: reviewers note it cannot pair with the Micro 2 or other Tribit models in TWS mode.
Pros: App reliability, Water resistance rating
Cons: Wired input, Backwards compatibility
Backwards compatibility is mixed: the lack of wired audio hurts older-device use, and one reviewer notes the older Willen had stack features this version lacks.
Pros: Charging time, Bluetooth range
Cons: Wired input, Power bank function
A recurring complaint is that Gen 2 cannot stereo-pair with the original Flex, which reduces upgrade appeal for existing owners.
Pros: Water resistance rating, Dust resistance rating
Cons: Wi-Fi streaming reliability, Wired input availability
Auracast gives the Grip modern JBL pairing options, but reviewers repeatedly note it will not pair with older PartyBoost JBL speakers.
Pros: Water resistance rating, Dust resistance rating
Cons: Smart assistant integration (Alexa, Wired input
Backwards compatibility is a weakness because reviews state it is not compatible with PartyCast-only devices and cannot pair with some older Soundcore PartyCast models.
Pros: Water resistance rating, Dust resistance rating
Cons: Wired input, Speakerphone quality
Backwards compatibility is limited because one reviewer said it cannot pair with older JBL PartyBoost speakers.
Pros: Water resistance rating, Dust resistance rating
Cons: Wired input, Speakerphone quality
Backwards compatibility is a common complaint: multiple reviews stress it will not pair in the usual way with older JBL speakers that rely on PartyBoost, including the Charge 5.
Pros: Dust resistance rating, Water resistance rating
Cons: Wi-Fi streaming reliability, Smart assistant integration (Alexa
Backwards compatibility is a repeated weakness because Flip 7/Auracast does not pair with older PartyBoost Flip speakers.
Pros: Privacy and data, Dust resistance rating
Cons: Smart assistant integration (Alexa, Speakerphone quality
Backwards compatibility is weak where discussed because one review says it cannot pair with older Boom-series models.
Pros: Float capability, Water resistance rating
Cons: Speakerphone quality, Power bank function