Not sure how they do it, but this amp packs a lot of performance and quality for the price. If you are hesitant to purchase because you haven’t heard of the brand or think the price is too low, don’t hesitate and just order. This brand went from unknown to a strong preference after my experience. Packaging and accessories were of good quality and instructions were clear. The amp powered my speakers very well and didn’t output any undesirable buzzing or excessive heat. The amp is very lightweight and versatile enough to mount in many locations as well. It would easily fit under a seat, though I mounted mine in the trunk.