Zen A2B vs Kicker Key

[RowsKing]

Besides cost why is one better than the other? I’ve been to 2 different car audio installers and both said I should be going the Nav-tv Zen A2B route instead of the Kicker key. They say it’s a cleaner sound. Can anyone give me some insight?

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[Copperhorse73]

Looks like it’s only for the B&O system on the lux package, and i think the Key interface is built only for the 4 channel systems