The D&B Audiotechnik Z1650.000 44S is a passive loudspeaker perfect for various audio setups. It features two 4.5” neodymium LF drivers and two 1.25' HF dome tweeters for great sound. It can be used as a stand-alone or with subwoofers. The optional back box allows for easy ceiling or wall mounting. Ideal for audiophiles and those seeking high-quality audio in different spaces. Dimensions are 390 x 128 x 150 mm (15.3 x 5 x 5.9″) without backbox and 480 x 140 x 180 mm (18.9 x 5.5 x 7.1″) with backbox. Weight is 3.6 kg (8 lb) without backbox and 6.2 kg (13.7 lb) with backbox.