I routinely travel with two small powered satellite and subwoofer speakers but listen between a tablet and a hi-res audio player. The two attributes that were appealing for this product were the ability to share two sources with one target but to have a "master volume control" to adjust the level once everything else was in balance between the speakers and woofers. The construction quality is good and the controls work fine. I wish it was fully enclosed and not constructed in "layers" but that undoubtedly would have increased the price and in all fairness, I haven't encountered any hum, noise or sound degredation with the device inserted. It has fit my needs well.
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