The answer — one pick, priced
Get the
Soundcore Boom 2 Plus
$80 under your budget
The backyard-and-pool speaker: IPX7 and it floats, 20 hours, 140W of BassUp 2.0 and a 10W power bank — back on Amazon at $170, down from ~$250 direct.
Fit ledger — need → measured evidence
■ The catch — co-equal billing, always
It is a big portable speaker, not a party speaker. At 7.7 lbs and 140W of Anker's own boosted maximum it fills a patio and a small backyard — it will not fill a garage or cover 50 people the way a 240W wheeled PartyBox does. There is no mic and no instrument input, so karaoke and a live guitar are simply out.
Dealbreaker? PartyBox Stage 320 at ~$550 adds wheels, mic and guitar inputs ↓
■ Every product has a catch. Verdicts that hide it are how bad buys happen.
Don't buy this if…
- you need a smaller portable Bluetooth speaker under $100 for personal/travel use, not partiesBluetooth speaker under $100 verdict →
- you want a mid-priced portable speaker under $300 for one or two listeners, not party volumeBluetooth speaker verdict →
- you need the loudest portable speaker for max-volume contests or DJ-level SPL, not balanced party sound
- you need a fixed outdoor speaker system for permanent installation around a patio or poolWaterproof outdoor speaker verdict →
Wrong product for you is still a bad buy. These are the cases where we'd send you somewhere else.
Runners-up — if your needs differ
Adjacent verdicts — other needs, same method
Different budget, different household, different job — each of these is already researched, priced and verified. Take the one that matches your need.
Traps — this verdict avoids
Why the Soundcore Boom 2 Plus is right for you
It avoids every trap below — and for family of 4, under $250, it is the pick because it delivers:
"Watts" means nothing here
Every brand quotes a different measure. Marshall reports total amplifier output (400W), JBL reports system RMS (160W-400W), Klipsch reports 80W RMS, Soundcore reports a BassUp-boosted maximum (140W), and Sony and Ultimate Ears publish no wattage at all. A 400W Marshall and a 400W JBL are not the same speaker. Where a reviewer publishes measured SPL, use that instead: RTINGS measures the $80 Klipsch Gig XXL above 100 dB, and the JBL Boombox 4 is rated at 105 dB.
The battery figure is measured at half volume
Quoted runtimes assume roughly 50% volume with the lights off. Run a real party — high volume, bass boost, LEDs on — and battery life drops 40-60%, so a 30-hour Sony is a 15-hour Sony. Battery speakers also get audibly quieter as the pack drains. One exception on this page: Klipsch quotes the Gig XXL's 8 hours at full volume, which is the honest way to publish it. For anything longer than an evening, plan on AC power.
IPX4 is not an outdoor rating
IPX4 means splash-resistant only — the JBL PartyBox 520, Stage 320, PartyBox 110 and UE HYPERBOOM are all IPX4 and do not belong in rain or near a pool. IP67 survives 1 m of submersion for 30 minutes; IP68 goes deeper. And the Klipsch Gig XXL publishes no IP or water rating at all on Klipsch's own spec page — treat it as an indoor or covered-patio speaker.
Provenance — 10 sources, dated
Winners are picked from the full research dossier at knowledgelib.io. Prices, stock and listings are re-verified monthly.