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DIY Bluetooth speaker build, advice please Answered

Hi all
Apologies for the newbie questions, I've decided to build my first portable speaker system. I was hoping to make my own version of the 'Vintage Audio Suitcase Speaker' e.g. www.vcase.com.au

I have found some second hand 6.5 inch 'Response' woofers for a cheap price and I have two spare satellite speakers from my Logitech Z-5500 system. Suitcase should be relatively easy to source.

What I'm struggling with is the amp and battery choice. I'd like this to be able to run for a few hours on battery, and be easy to recharge via mains or USB. I don't mind spending a bit of money on the amp as I'd like this to last a good few years.

The tricky part is, with my current speaker plan, it would need to run 4 speakers that are rated at 70wrms each. Plus the Logitechs are 8 ohm and the Response woofers are 4 ohm. Is this possible?

Advice much appreciated.

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