A:Answer Hello Mlkay, thank you for your message. As a part of the normal characteristics of the Bluetooth® technology, there might be a slight delay on the sound coming from the speaker compared to the sound coming from the connected Bluetooth device. During playback, the sound may play slower than the video. Comparison Power Output between both Audio devices are as follow: For GTK-XB7BC Power Output (rated): Left/Right Channel: 130 W + 130 W (at 3 ohms, 1 kHz, 1% THD)
RMS output power (reference): Left/Right Channel: 235 W + 235 W (per channel at 3 ohms, 1 kHz, 30% THD) and for LBTGPX555 Front speaker Power Output (rated): 350 W + 350 W (at 4 ohms, 1 kHz, 1% THD) RMS output power (reference): 600 W + 600 W (per channel at 4 ohms, 1 kHz)
Subwoofer RMS output power (reference): 600 W (4 ohms, 100 Hz). Oscar.