https://www.amazon.com/Rolls-DA134-4-Channel-Distribution-Amplifier/dp/B00BYNGUME

(x4) https://www.amazon.com/Hosa-TRS-201-Insert-Cable-Meter/dp/B000068O1J

https://www.sweetwater.com/store/detail/SLA4--art-sla-4-4x140w-power-amplifier

https://www.sweetwater.com/store/detail/GPro4--gator-g-pro-4u-19-pro-series-rack-case

plug the iPod into the Rolls, use 4 of those cables to plug into each channel of the amp, and think about upgrading to 10AWG or 8AWG speaker wire. I didn't post a link because you can find so many good brands yourself. the case is optional, and you might have to buy rack screws, but they're cheap and definitely worth it. plus you can carry the amp around at your convenience. hope that helps