Bluetooth® audio streaming and telephony support The three full-range, multi-channel GTR amplifiers (102, 104 and 7535 models) feature Bluetooth® connectivity for wireless audio streaming from phones and other devices. You can receive phone calls through your car audio system, just by touching a button on an included control panel. Clari-Fi™ audio restoration technology Clari-Fi™, a proprietary DSP technology, is incorporated in the GTR-102, GTR-104 and GTR-7535 amplifiers, analyzes music files and improves highly compressed digital music files in real time. A predictive algorithm restores audio content that is discarded in the compression process. Clari-Fi™ works with all playback devices and audio sources. It extends high-frequency bandwidth, restores the natural warmth of vocals and widens the sound stage. In short, Clari-Fi™ gives your digital music back its soul. Party Mode wireless pairing The GTR-102, GTR-104 and GTR-7535 amplifiers offer Party Mode, a multi-pairing capability that enables Bluetooth® devices to stream audio individually. When Party Mode is selected from the cabin-mounted control panel, anyone in the car can drive the music. Cabin-mounted control panel The GTR-102, GTR-104 and GTR-7535 multi-channel amps come with a wired control panel that incorporates an omni-directional microphone and puts a range of functions at your fingertips. You can activate Bluetooth® pairings, accept and end phone calls, select Party Mode and cancel Clari-Fi™. Class D amplification Every GTR amplifier, including the full-range models, is a Class D. These high-efficiency, low-heat amps generate a lot of power without drawing much current, and feature small footprints. Full-range line outputs The full-range GTR amplifiers (GTR-102, GTR-104 and GTR-7535) include full-range line outputs. This enables them to pass the audio signal to additional amps that power subwoofers, increasing your system configuration options. Upgradable firmware GTR amplifiers incorporate a mini-USB port that enables you to easily upgrade firmware. ADAS Input The full range GTR amps feature an ADAS input which overrides the audio signal when connected to ADAS accessories. In addition, ADAS alert routing location can be assigned during amplifier setup using the panel mounted control.