Opened-box, ex-display and customer-returned units that have been checked and confirmed working, but can no longer be sold as brand new. Each listing describes the condition of the specific unit and what comes in the box, so nothing about its history is left to guesswork. Recent listings have included a Sennheiser SK100 G4 bodypack transmitter in the GB range (606 to 648 MHz), an Audio Technica PRO45 cardioid hanging microphone and a pair of Biamp Apart MASK6C 6.5-inch IP64 installation speakers in white.

B stock suits buyers who care about function over packaging: fixed installs, additions to hire stock and the spares shelf. Read the condition notes on each listing before ordering, since they describe the exact unit for sale rather than a generic product.