Samsung HW-LST70T vs Samsung Q990B comparison definitely makes sense. Based on our rating, HW-LST70T has a total rating of 6.4 out of 10 versus 9.8 for Q990B.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the Samsung HW-LST70T has 3.0 versus 11.1.4 for the Samsung Q990B. The output power is different and equal to 210 (overall) W for the HW-LST70T versus 656 (overall) W for the Q990B. Only the Samsung HW-LST70T has a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The Samsung HW-LST70T got our rating of 6 out of 10, and the Samsung Q990B 10 for its audio features and specs.
Spotify is available on each of the soundbars.
These models have the ability to connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. The Samsung HW-LST70T has 1/0 HDMI inputs/outputs versus 2/1 of the Samsung Q990B. Only the Q990B supports HDMI Audio Return Channel (ARC). Both soundbars have a USB connector. For connectivity, the HW-LST70T received a rating of 6/10 versus 10/10, respectively. App control is available in every soundbar. A built-in microphone is present in each model. Multi-room is only available for the Samsung HW-LST70T.
Only the Q990B has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the Q990B. For multichannel surround Samsung HW-LST70T got a rating of 5, and Samsung Q990B 10 out of 10.