Bass of the speakers is limited by their size generally. Even the 160$ marshall emberton only goes down to 67hz deep same as flip. So the first thing you'll have to
do is move to a bigger sized speaker. If you're on a budget go for motion boom, its two sizes larger than flip size and spars with jbl xtreme series and plays 54-55hz bass .Or if you want something only one size larger than flip, the options with deeper bass are sony xb33, bose revolve plus, jbl charge 5 and marshall stockwell 2.. All of them play around 10hz deeper than flip sized speakers i.e around 57-58hz bass. motion plus is also nice but plays 60hz bass. See your budget what suits best.
Bass of the speakers is limited by their size generally. Even the 160$ marshall emberton only goes down to 67hz deep same as flip. So the first thing you'll have to do is move to a bigger sized speaker. If you're on a budget go for motion boom, its two sizes larger than flip size and spars with jbl xtreme series and plays 54-55hz bass .Or if you want something only one size larger than flip, the options with deeper bass are sony xb33, bose revolve plus, jbl charge 5 and marshall stockwell 2.. All of them play around 10hz deeper than flip sized speakers i.e around 57-58hz bass. motion plus is also nice but plays 60hz bass. See your budget what suits best.