We had this removed from a dealer’s showroom where it was showcased with other inwall/inceiling speakers as demo speakers for the prospective customer to listen. The drivers found on the speakers are where the value is. The tweeter is a 1″ silk dome while the woofer is a 6.5″ carbon fiber cone. Frequency range is 43 Hz to 20 kHz with a nominal impedance of 8 ohm and a sensitivity of 90 dB. Dimension of the speaker is 8 1/4″ x 12 3/16″ x 3 3/8″. Cutout dimensions are 6 3/4″ x 10 5/8″. Speaker can be either mounted inwall or inceiling. We have the grille covers for it and will securely packed them for safe shipping. See our other listing for a single S623T which you can combine together to make it 3 channel.