Laptop Speakers Drawing a Lot of Power
Look on the datasheet for the PAM8302A IC.
It is designed for 4 ohm or 8 ohm speakers and usually a 5V supply. Then its output with fairly low distortion is 2.2W into 4 ohms or 1.4W into 8 ohms. It is class-D so it has high efficiency. The datasheet shows a supply current of 550mA at 2.2W into 4 ohms with a 5V supply. Maybe your current meter is too slow to measure peak current.

But you connected TWO speakers instead of one speaker so maybe you overloaded the amplifier module.

A large speaker is usually much louder than a small speaker so maybe the large speaker power was less and maybe it was 8 ohms that uses half the power of a 4 ohm speaker.