The Good The Griffin AirCurve Windshield Mount securely holds an iPhone 4 or 4S in place while driving. The passive amplifier boosts audio output without obstructing the dock connector.
The Bad The semipermanent mounting options can be difficult to adjust once placed and limit intervehicular portability more than a simple suction cup.
The Bottom Line The Griffin AirCurve Windshield Mount is low-tech, but high-quality, noticeably boosting the volume of a cradled iPhone's speaker.
Griffin AirCurve Window Mount - car holder
The AirCurve ships in four glossy, black parts: the dock itself, a 3.5-inch plastic arm that connects to the dock with a ball-in-socket joint, and a pair of plastic mounting clips for windshield and dashboard mounting.
The AirCurve grips the iPhone with two, spring-loaded arms, which hold the handset in place over a pair of rubber hollow contact points. Between those lower contact points is space enough to connect the iPhone's dock connector for charging. One of the contact points (left) covers the iPhone's internal microphone, allowing sound to pass to the phone unmolested. The other (right) contact funnels sound from the phone's speaker into the AirCurve's passive amplifier.
The passive amplifier is old and low-tech -- almost 135-year-old low-tech. Essentially, it works like the horn on a 19th century phonograph, accepting the sound at the narrow end of a hornlike passage, snaking through the body of the AirCurve, and channeling it out of the wide opening just to the right of the phone mount.