At first glance, it may be difficult to tell the difference between the Double K Airmax Dryer and the Double K Extreme Dryer, but there are significant differences in the two models that you should know.
First off, the motor/fan assemblies in both models are different. The Double K Extreme Dryer has a more powerful 5.7 inch diameter motor/fan assemblies while the Double K Airmax dryer has only a 5.1 inch diameter motor/fan assembly.
When it comes to measuring the power on these motor/fan assemblies, power is defined by the motor generated torque. Both the Double K Airmax and Extreme produce approximately 123 CFM free air, but the Double K Extreme does so at a much lower speed of 22,500 RPM vs the Double K Airmax at 32,000 RPM.
Both the Double K Extreme and Airmax produces about the same amount of air pressure or vacuum, but since the Double K Extreme utilizes the larger 5.7 inch motor/fan assembly, it achieves this without working as hard, which causes the motor to last longer.
In the Double K Airmax Dryer, the density at the brush to commutator contact point is much higher compared to the Double K Extreme. This causes both the commutator and brushes in the Airmax to wear much quicker, thus leading to more replacements.
The Double K Extreme Dryer has a modest increase in practical air volume over the Double K Airmax, while the Airmax has a slight increase in temperature over the Extreme. Because of these advantages over each other, the Double K Extreme has a slight advantage in penetrating dense undercoats, while the Double K Airmax has a slight advantage in colder more humid conditions.
At the end of the day, the primary difference between the Double K Airmax and Double K Extreme is the general life expectancy of the motor. Other notable differences are that the Extreme comes with a 10 ft hose while the Airmax comes with a 6ft hose. The Extreme also weighs a couple more pounds over the Airmax.