JBL is known for pro audio and Bluetooth speakers, but the company also has a history of making sound bars geared toward movie bombast at the expense of musical refinement. The SB450 continues in this vein, thanks in part to a booming subwoofer that sounds (and looks) enormous by sound bar standards.

Beyond that big box, the SB450 adds a couple of features missing from previous sound bars. The most obvious is the four HDMI ports that will pass 4K signals, but the sound bar will also enable Bluetooth restreaming to other JBL devices.

Despite its big sound the $500 the JBL comes up a little short against competitors such as the Vizio SB4551-D5 and the LG Sh7B, which offer better overall performance and features.
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https://www.cnet.com/reviews/jbl-cinema-sb-450-review/