First, delivery took only 10 days. Highly recommended seller! Thank you so much. As for the performance, i tried 18 volts and amp is really loud. Bluetooth connects fast. One minor noticeable flaw is that left channel seem have a bit of lower volume whether using auxiliary input or bluetooth. But power wise, it packs a punch for such a small amp. I just love it! Thank you so much.
For the price the sound is fine.