SendyAudio Pigtail Adaptor (6N-OCC) 3.5mm male to 4.4mmBAL female
This is a gorgeous 3.5 to 4.4mm adapter. Definitely on the expensive side, but if you already have money in your cables and you need a 4.4mm adapter, you don't want to put something ordinary on there. This dresses up any cable.
This pigtail adaptor is beautifully made, stylish, and allows the sound of your other equipment to come through with no coloration. It's a little pricey, but it's of a very high quality. I'm very happy with this purchase.