"The sound engineering that went into this small speaker is all about getting bass response that usually needs much bigger drivers and enclosures. JBL tuned the parts inside to make what they call "punchy bass" which means that you can feel the low-end frequencies instead of just hearing the tinny mids and highs. A single driver and passive radiators in the speaker boost the bass without needing extra power or space."
"With moderate volumes, the battery lasts up to seven hours of continuous playback which is enough for most day trips or outdoor activities without having to find an outlet. The Playtime Boost feature adds two more hours by changing the audio processing to use less power. However, you will lose some volume and bass depth in exchange for longer battery life."
JBL Go 4 is on sale for $39, down from $49, representing an all-time low price that suits personal use or budget gifts. Sound engineering focuses on producing bass that typically requires larger drivers and enclosures, using a single driver and passive radiators to boost low-end frequencies for fuller sound from a product under half a pound. Battery life reaches up to seven hours at moderate volumes, with Playtime Boost adding two hours by reducing audio processing at the cost of volume and bass depth. IP67 rating provides waterproofing and dustproofing, and the enclosure uses recycled plastic with a fabric grille.
Read at Kotaku
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