I bought both of these new and used them in a home setting for a matter of a couple of weeks while playing with some active setups. The ART Cleanbox Pro comes with the original box - $45 The ART Splitbox 4 has no packaging - $30 https://www.avshop.ca/sound-amp-pa-audio/audio-accessories/level-matching-transformers/art-cleanbox-pro-dual-channel-level-converter https://www.avshop.ca/sound-amp-pa-audio-mixers-utility-mixers/art-splitmix4-4-channel-passive-splitter-mixer