Place this twisted wire pair on to the first inverting input terminal (pin 2) on the operational amplifier, and solder the connection.3Connect either a pair of headphones or a pair of balanced 1/4-inch jack cables to outputs 1 and 2 respectively.2Locate your Pioneer stereo's auxiliary input jack.Headphones Similar to Ear BudsWhile ear buds are held in place by resting just within the ear; other similar styles stay in place by slightly different means. If the cable isn't able to plug into a headphones jack, you need to find a set of external speakers that do. Look for lightweight models with a small footprint to make it easy for the kids to carry their own portable DVD players.4Consider a Bluetooth headset with ear buds that wrap around both ears and join at the nape of your neck.5 mm headphone...