MLaffThis is designed for headphones. As long as your RCA source is from a computer, phone, TV or CD player, you're fine with just this. The only thing you need a preamp for would be a turntable.
MLaffShould work just fine with the L/R Analog input on your sound bar, depending on what you are listening to music from?
What are you playing your music with exactly?
FOBeanI'm playing music now with my phone connected to a fii0 a5 amplifier....it's portable. I wanted to buy a better amp but I don't know how they hook up.....can i hook it up to this sound bar and then play music through the soundbar bt? I see amplifier's everywhere for sale but no instructions on what you hook them up to....
MLaffThis amplifier is meant for output to headphones. It only has two sets of RCA-type inputs, but no preamp outputs. The amplifier has left and right RCA inputs, to connect to the sound output from a source device like a CD/DVD/Bluray player. Your sound bar has inputs, but I don't see outputs on it.
A source device that will work with this amp will have outputs in the form of RCA (looks like the red/white connectors on your sound bar), or possibly a headphone output where you could connect an adapter that converts the headphone output of your source to male RCA jacks. I hope that helps.